Bill Bur gleichnochmal dazu, wie man mit Frauen/seiner Freundin streitet:
Im wesentlichen der Gedanke, der Fels in der Brandung zu sein. David Deida hatte schon mal ähnliches geraten.
Bill Bur gleichnochmal dazu, wie man mit Frauen/seiner Freundin streitet:
Im wesentlichen der Gedanke, der Fels in der Brandung zu sein. David Deida hatte schon mal ähnliches geraten.
Comedian Bill Bur zum Mutterjob:
Haare sind interessant, weil sie in vielen Kulturen in einer engen Verbindung mit Schönheit stehen und die Behaarung sich zwischen den Geschlechtern unterscheidet.
Dabei ist zwischen Haupthaar, Gesichtsbehaarung und Körperbehaarung zu unterscheiden.
1. Haupthaar
Beim Haupthaar, dass beim Menschen eine beachtliche Länge im Vergleich zu anderen Tieren erreichen kann, ist zunächst erst einmal anzumerken, dass es sich durchaus als „Costly Signal“ anbietet. Am Haar kann man über den Wuchs, den Glanz, die Pflege vieles über den Ernährungsstand und den Gesundheitszustand des Trägers innerhalb der letzten Monate oder Jahre erkennen. Schönes, gesundes, glänzendes langes Haar wird daher in den meisten Kulturen gerade bei Frauen als Attraktivitätsmerkmal geschätzt.
Bei Männern gelten die gleichen Betrachtungen. Sie haben allerdings den „Vorteil“, dass ihr Ernährungszustand und insbesondere auch die Fähigkeit zusätzliches Essen zu besorgen oder Rivalen abzuschrecken bzw. die Frau zu beschützen, weit zuverlässiger über Muskeln vermutet werden kann, die ebenfalls einen gewissen Rückblick zulassen. Hinzu kommt, dass langes Haar bei Männern im Kampf hinderlich sein kann. Dies macht lange Haare zwar auch bei Männern attraktiv, aber weniger bedeutsam als bei Frauen. Es kann ein guter Indikator sein, eine Überbewertung könnte aber nachteilhaft sein.
2. Körperbehaarung
Die Körperbehaarung dürfte bei den Menschen verschwunden sein, weil Haarlosigkeit Parasiten schlechtere Chancen bietet, sich einzunisten. Nach einer Theorie übernahm beim Menschen die Sprache schnell die soziale Rolle, die Fellpflege bei anderen Primaten hat. Der Mensch wurde dadurch anfälliger für Parasiten und wurde sein Fell los, um sich vor diesen zu schützen. Beünstigt wurde dies dadurch, dass der Mensch intelligent genug und handwerklich geschickt genug war, um sich einen anderen Körperschutz über Kleidung aus den Fellen anderer Tiere zuzulegen, die man leichter säubern und tauschen konnte.
Haarlosigkeit war demnach ein evolutionär geförderter Zustand, was auch erklären dürfte, warum es eine Enthaarungsindustrie gibt. Allerdings bietet Haar eben auch noch einen gewissen Schutz vor Kälte, Regen und anderem ungemach. Um so mehr die Menschen diesen ausgesetzt waren um so mehr Haar brauchten sie. Da Männer auf der Jagd eher Wind und Regen ausgesetzt waren, haben sie mehr Körperbehaarung behalten als Frauen. Hierfür spricht auch, dass die Körperbehaarung erst mit der Geschlechtsreife zunimmt, wenn Kinder eher Aufgaben übernehmen, die sie aus dem Schutz der Unterkunft/Höhle/Gemeinschaft entfernen. Damit ist Haarlosigkeit gleichzeitig ein Zeichen von Jugend, was in Verbindung mit anderen Attraktivitätsmerkmalen für sexuelle Reife, etwa Brüsten bei Frauen, eine sininvolle Selektion sein kann und dazu führt, dass Frauen um schön zu sein nahezu ihren gesamten Körper rasieren.
Gerade über die unterschiedliche Anpassung an die Rollen und die Steuerung über Testosteron würde dann zudem auch der Weg zu einer sexuellen Selektion der Haarlosigkeit des Körperhaars bei der Frau entstehen.
Ich könnte mir in diesem Zusammenhang auch vorstellen, dass der Haarentfernungskult bei Frauen vielleicht auch Ursache einer recht einfachen Programmierung des „Haarlosigkeitsmerkmals“ bei Männern ist. Diese könnte beispielsweise lauten „Volles Haar auf dem Kopf, darunter wenn sonstige Fruchbarkeitszeichen vorhanden sind, so wenig wie möglich“. Blendet man moderne Methoden der Haarentfernung aus, dann ist das keine schlechte Regel für die Auswahl langfristig fruchbarer Partner. Dem entgegen stehen dann ausbremsende Vorteile bei den Frauen, die die Selektion hin zur Haarlosigkeit wieder einschränken. Das wäre an den Armgelenken und im Schritt die höhere Verdunstung von Feuchtigkeit aufgrund der größeren Oberfläche (ein Grund warum Schamhaare kraus sind), die Krankheiten vorbeugt.
3. Gesichtshaar
Es fällt auf, dass Männer eine imposante Gesichtsbehaarung haben, Frauen aber nicht. Dies gilt dabei insbesondere für Kaukasier und weniger für Asiaten oder Afrikaner.
Jetzt liegt es nahe einen solchen Bartwuchs als Ausdruck der Männlichkeit zu sehen und damit als Attraktivitätsmerkmal.
Dagegen spricht aber, dass sich die Männer in vielen Gegenden rasieren. Ein Vollbart gilt heute in wenigen Teilen der Welt als sexy. Allenfalls Dreitagebärte haben eine gewisse Attraktivität.
Wenn aber der Bart ein abgespeichertes Attraktivitätsmerkmal wäre, dann gäbe es wohl schlechtere Zeiten für Rasierklingenhersteller.
Ich würde daher vermuten, dass der Bart nicht im Rahmen der sexuellen Selektion entstanden ist, sondern eher Schutzfunktion hatte.
Dies wird dadurch wahrscheinlicher, dass gerade bei den Menschen, die lange Zeit in kälteren Gegenden gewohnt haben, der Bart am dichtesten ist. Danach wäre der Bart ein Zeichen für die Arbeitsteilung zwischen Mann und Frau.
Frauen, die der Witterung weniger ausgesetzt waren, konnten sich hingegen erlauben, auch das Gesichtshaar zu verlieren. Damit war wiederum der Weg zu einer sexuellen Selektion eröffnet, da Frauen bei denen der Testosteronanteil hoch war, Gesichtsenthaarung entwickeln, was aber auf eine geringe Fruchtbarkeit schließen läßt. Wohl ein Grund, warum Frauenschnurrbärte nicht als sexy gelten, was bei einer gesellschaftlichen Erklärung ja durchaus nicht auszuschließen wäre.
Folgt man dem Modell, nach dem die sexuelle Identität durch pränatale Hormone herausgebildet wird, dann wäre von Folgenden auszugehen:
Im menschlichen Gencode sind bei jeden Menschen die wesentlichen Baupläne für Mann und Frau vorhanden. Lediglich einige Besonderheiten für den Mann sind auf dem Y-Chromoson enthalten, beispielsweise der Bauplan für die Hoden.
Welcher Bauplan letztendlich abgesehen von den Primären Geschlechtsorganen ausgeführt wird, wird nach dem Testosteronspiegel bestimmt, wobei dieser bezüglich des Gehirn an der Blut-Hirn-Schranke über bestimmte Rezeptoren in Östrogen umgewandelt wird. Da normalerweise die Hoden dafür sorgen, dass der Fötus genug Testosteron bekommt, um die Schwelle zu überschreiten, die für die Ausführung des Programms Mann erforderlich ist, sind die meisten Männer heterosexuell (und die Frauen mangels einer derart ergibigen Testosteronquelle ebenfalls). Der Fötus enthält zur Entlastung aber auch noch weiteres Testosteron über die Mutter, die dies in ihren Eierstöcken und in ihren Nebennierenrinden herstellt. Entscheidend ist dabei eine sehr enge Phase und der zu diesem Zeitpunkt herrschende Testosteronspiegel. Bleibt Testosteron aus wird üblicherweise das „Standardprogramm“, also weibliche Attraktivitätsmerkmale ausgeführt.
Homosexualität würde dann bestehen, wenn das „falsche“, also nicht zum Phänotyp passende Attraktivitätsmuster ausgeführt wird. Bisexualität würde demnach erfordern, dass etwas von beiden oder beides nebeneinander ausgeführt wurde.
Dies kann auf verschiedenen Gründen beruhen:
1. Männliche Homosexualität:
2. Weibliche Homosexualität:
Für Ergänzungen bin ich dankbar.
Man sieht an dieser Auflistung, dass nicht alle Ursachen ihren Ursprung in den Genen des/der Homosexuellen haben müssen. Deswegen gibt es auch kein „Schwulengen“ oder „Lesbengen“, dass alle Schwulen oder Lesben gemeinsam haben. Es kann aber natürlich Gene geben, die zB bei Männern die Androgenrezeptoren unempfindlicher machen oder bei der Mutter die Ausschüttung von Testostern während der Schwangerschaft reduzieren oder für abweichend arbeitenede Nebennierenrinden sorgen oder dies zumindest begünstigen.
Da die Steuergene bislang noch sehr unerforscht sind, besteht auch hier noch ein gewisses Potential, wobei dies dann evtl. auch nur wieder im Zusammenspiel mit weiteren Faktoren zum Tragen kommt. Ist beispielsweise der Schwellenwert bei einem Mann leicht hinaufgesetzt, aber noch innerhalb der Toleranzen, dann wirkt er sich nur aus, wenn die Mutter in der entscheidenden Phase weniger Testosteron bereit stellt oder evtl. auch nur wenn der Fötus und die Mutter jeweils etwas weniger Testosteron bereit stellen. Ein solches Gen könnte beispielsweise lesbische Mädchen auf der einen Seite vermeiden und in den meisten Fällen folgenlos sein, aber gleichzeitig bei dem Zusammenspiel bestimmter Faktoren eher zu schwulen Jungs führen. Das Gen ist natürlich auch andersherum vorstellbar und würde dann eher schwule Jungs vermeiden, aber im Zusammenspiel mit höheren Werten eher zu lesbischen Mädchen führen.
Es würde sich dann um auf ein bestimmtes Geschlecht ausgerichtete Chancenoptimierung bei der Fortpflanzung handeln.
Einige dieser Möglichkeiten wurden bereits erforscht, etwa die CAH-Mädchen, deren Nebennierenrinden mehr Testosteron produzieren und die daher häufiger lesbisch sind. Oder Schwule mit einer geringeren Testosteronproduktion.
Andere gibt es vielleicht nicht oder sie werden noch entdeckt. Es handelt sich insoweit um auf der Theorie aufbauende Möglichkeiten.
Aus der „Bachlorette“ Show:
Er zeigt schön verschiedenste Grundsätze, von der Anziehung einer gewissen Gleichgültigkeit bis hin zu hohen Ansprüchen, sozialer Dominanz, Alphamannverhalten, Neggs, Inner Game etc.
Eine weitergehende Besprechung gibt es in dem Artikel „Gold Medal Hamsterization“ bei Gucci Little Piggy.
(Was ein Hamster damit zu tun hat, wird hier erklärt: The typically illogical operation of human brain, especially a woman’s, providing a justifying rationalization for their actions in accordance with evolutionary beneficial strategies for mating or survival, but at odds with societal mores, one’s internal sense of honor and justice, etc.)
Die Seite „Eve bit first“ klärt uns auf, ab wann man bereits ein Vergewaltigungsunterstützer ist.
„A man is a rape-supporter if…
Ja. Kann sehr lustig sein. In den besseren Clubs sehen die Frauen phänomenal aus und können echt tanzen.
Ich bin für Abtreibung, weil ich ein Interesse daran habe, dass Frauen abtreiben, aber auch weil ich dem Fötus in diesem Stadium einen recht geringen Wert zuweise und nicht einsehe, warum eine Frau zwingend daran festgehalten werden muss, die Schwangerschaft aufrechtzuerhalten. Die Verfügbarkeit von Frauen wird meiner Meinung nach dadurch nicht sehr erhöht. Also wohl eher nein.
Religiöse Ansichten dieser Art verbreite ich schon mal nicht. Da ich keine Unterordnung (allerdings auch keine Überordnung) der Frau sehe würde ich den Rest auch nicht annehmen.
Das ein Mann in eine Frau eindringen will erscheint mir jetzt nicht gleich auf eine Vergewaltigung hinzudeuten. Das Eindringen in eine Frau kann meiner Kenntnis nach für beide Personen ganz angenehm sein. Die weibliche Anatomie mit Begriffen des Eindringens beschreiben. Darunter kann ich mir noch nicht so recht etwas vorstellen.
Welche Frauen man attraktiv findet ist ein sehr ergiebiges Gesprächsthema, ob mit Männer oder mit Frauen (die dann auch im Gegenzug gerne sagen können, welche Männer sie attraktiv finden). Da ich ein höflicher Mensch bin sage ich Frauen selten, dass ich sie nicht sexuell anziehend finde, solange sie auch freundlich sind. Natürlich habe ich schon einer Frau gesagt, dass sie nicht mein Typ ist, als False Disqualifer oder Neg.
Etwas zu Einkommen und Attraktivität:
About 64% of men and 51% of women report their income. Figure 5.6 shows how these self-reported income measures are related to the members‘ dating outcomes. Income strongly a®ects the success of men, as measured by the number of ¯rst contact e-mails received. While there is no apparent e®ect below an annual income of $50,000, outcomes improve monotonically for income levels above $50,000. Relative to incomes below $50,000, 18The BMI is de¯ned as BMI = 703 £ w=h2; where w is weight in pounds and h is height in inches. 21 the increase in the expected number of ¯rst contacts is at least 32%, and as large as 156% for incomes in excess of $250,000. In contrast to the strong income e®ect for men, the online success of women is at most marginally related to their income. Women in the $35,000- $100,000 income range fare slightly better than women with lower incomes. Higher incomes, however, do not appear to improve outcomes, and are not associated with a statistically di®erent e®ect relative to the $15,000-$25,000 income range.
Quelle: What Makes You Click: An Empirical Analysis of Online Dating
Und aus eine Stellungnahme einer Forscherin:
Researchers have done this* and find that for men there is no amount of income that the woman in the bottom ten percent in terms of appearance can earn to make men prefer her over women in the top 10 percent. That is, looks really matter to men relative to income. For women though, if the man in the bottom ten percent in terms of looks earns more than $248,500, they will prefer him over the more attractive guy earning $60,000. My students often interpret this result as saying that women really care about money, but that is not what it says at all—$186,000 is a huge difference in income. If women didn’t care about looks and only cared about money, the figure would be much, much lower. This says that despite the impression that on the marriage market women really care about income, the evidence suggest that they also care about looks. They just care about income too.
Und schließlich noch:
Three out of four women said they would not wed someone without a job, and 65 percent would feel uncomfortable tying the knot if they themselves were jobless.
But more than 91 percent of single women said they would marry for love over money.
„It is ironic that women place more weight on love than money, yet won’t marry if they or their potential suitor is unemployed,“ said Meghan Casserly, of ForbesWoman which conducted the survey with the website YourTango.com.
Quelle: Women will wed for love, if partner has job
Bei dem letzten Zitat handelt es sich natürlich nur um eine Internetbefragung, aber ich denke es gibt die Meinungen vieler Frauen recht gut wieder. Das Problem ist eben, dass eine Frau natürlich aus Liebe heiraten würde, auch wenn derjenige kein Geld hat, dass aber gar kein Geld haben (was meist die Folge ist, wenn man keinen Job hat) dazu führt, dass sich Frauen nicht in einen Verlieben, weil es eben einen niedrigen Status signalisieren KANN. Aber eben nicht muss. Eine Frau kann sich sicherlich zu einem arbeitslosen Mann hingezogen fühlen und in ihn verlieben, wenn er anderweitig Status darstellen kann oder sie denkt, dass seine Arbeitslosigkeit nur ein vorübergehender Zustand sein muss (bis er zB mit seiner Band groß rauskommt).
Die Diskrepanz ist also nur eine solche, wenn man nicht versteht, dass Geld nur ein Symbol für andere Attraktivitätsmerkmale ist. Deswegen zieht auch extremer Reichtum bei Frauen mehr als bei Männern, weil es eben Status signalisieren kann.
Ich war kürzlich bei einem befreundeten Ehepaar zu Besuch, die eine etwa 10 Monate alte Tochter haben.
Beide sind Rechtsanwälte und beide in Kanzleien tätig.Ein Beruf, bei dem man wohl kaum davon ausgehen kann, dass die Frau sich leicht unterbuttern läßt.
Seit das Kind auf der Welt ist tritt sie beruflich kürzer. Mit dem Stillen und allem drum und dran geht es eben nicht anders, auch wenn er ihr viel abnimmt, wenn er dann später nach Hause kommt.
Als ich dar war, hatte das Kind etwas Fieber und zudem zahnte es wohl und war demnach recht unwirsch, aber, wie an dem gut entwickelten Organ erkennbar durchaus noch bei Kräften. Sogar sehr bei Kräften, denn sie hatte die Nacht durchgemacht und wenig Tendenzen leiser zu werden.
Die Mutter war recht fertig, aber wenn man das Kind aus ihren Armen nahm, damit sie etwas Ruhe hatte, dann wurde das Schreien lauter und die Pausen dazwischen kürzer. Menschenbabies haben eben auch eine gewisse Prägung auf eine Hauptbezugsperson und das wird schon durch das Stillen meist die Mutter.
Sie wollen noch ein zweites Kind und nach Wunsch der Mutter auch evtl. noch ein drittes. Dann wird sie wohl ganz aufhören zu arbeiten, weil es mit den Kindern zuviel wird. Eine andere Aufteilung können sich beide nicht vorstellen.
Scheint mir nicht untypisch zu sein.
Eine Studie zu unser Wahrnehmung von schönen Leuten:
Two studies examined the influence of a female offender’s level of physical attractiveness on forgiveness. In Study 1, an apology offered to a male participant (role-playing a victim) by an attractive female offender was more effective at increasing forgiveness compared to the same apology offered by a less attractive offender. In contrast, female participants displayed the opposite pattern, responding more positively to the less attractive offender. Study 2 revealed that this effect was mediated by participants‘ judgments about the quality of the apology received. Male participants judged the apology as higher in quality when it was offered by the attractive offender, whereas female participants rated the apology as higher quality when it was offered by the less attractive offender.
Source: „Is beauty a gift or a curse? The influence of an offender’s physical attractiveness on forgiveness“ from Personal Relationships
Würde also bedeuten, dass schöne Frauen sich mehr erlauben können, während Frauen bei schönen Männern skeptischer sind. Das erklärt, die Skeptik vieler weiblicher Leser dieses Blogs 😉
Eine Erklärung wäre, dass Männer bei schönen Frauen nicht viel zu verlieren hatten, weil sie die Kosten einer Schwangerschaft abwälzen können. Die Frauen hingegen hatten, weil der Mann auch für andere Frauen attraktiv war, eher etwas zu verlieren.
Terminator macht auf einige Studien zur Verteilung der Intelligenz innerhalb der Geschlechter aufmerksam:
Brother–sister differences in the g factor in intelligence: Analysis of full, opposite-sex siblings from the NLSY1979 Original Research Article
Intelligence, Volume 35, Issue 5, September-October 2007, Pages 451-456
Ian J. Deary, Paul Irwing, Geoff Der, Timothy C. Bates
Abstract
There is scientific and popular dispute about whether there are sex differences in cognitive abilities and whether they are relevant to the proportions of men and women who attain high-level achievements, such as Nobel Prizes. A recent meta-analysis (Lynn, R., and Irwing, P. (2004). Sex differences on the progressive matrices: a meta-analysis. Intelligence, 32, 481–498.), which suggested that males have higher mean scores on the general factor in intelligence (g), proved especially contentious. Here we use a novel design, comparing 1292 pairs of opposite-sex siblings who participated in the US National Longitudinal Survey of Youth 1979 (NLSY1979). The mental test applied was the Armed Services Vocational Aptitude Battery (ASVAB), from which the briefer Armed Forces Qualification Test (AFQT) scores can also be derived. Males have only a marginal advantage in mean levels of g (less than 7% of a standard deviation) from the ASVAB and AFQT, but substantially greater variance. Among the top 2% AFQT scores, there were almost twice as many males as females. These differences could provide a partial basis for sex differences in intellectual eminence.
Sex-related differences in general intelligence g, brain size, and social status Original Research Article
Personality and Individual Differences, Volume 39, Issue 3, August 2005, Pages 497-509
Helmuth Nyborg
Abstract
The question of a sex difference in intelligence has long divided the experts. IQ researchers sum standardized subtest scores to calculate intelligence in general, and find that males outscore females by about 3.8 points, whereas factor analysts derive the g factor scores from intertest-correlations and find no consistent sex differences in general intelligence. The latter finding is puzzling, as males have larger average brains than females, and brain size correlates .30–.45 with g (and IQ). Males thus “ought” to score a higher g than females.
The present study addressed this paradox by testing four hypotheses: (1) Inadequate analyses explain why researchers get inconsistent results, (2) The proper method will identify a male g lead, (3) The larger male brain “explains” the male g lead, (4) The higher male g average and wider distribution transform into an exponentially increased male–female ratio at the high end of the g distribution, and this largely explains male dominance in society.
All four hypotheses obtained support and explain in part why relatively few males dominate the upper strata in all known societies. The confirmation of hypothesis 3 suggests that the brain size—intelligence–dominance link may be partly biological.
Testing the developmental theory of sex differences in intelligence on 12–18 year olds Original Research Article
Personality and Individual Differences, Volume 36, Issue 1, January 2004, Pages 75-82
Roberto Colom, Richard Lynn
Abstract
The consensus view states that there are no sex differences in intelligence. However, Lynn (1994, 1999) has formulated a developmental theory of sex differences in intelligence that challenges that view. The theory states that boys and girls mature at different rates such that the growth of girls accelerates at the age of about 9 years and remains in advance of boys until 14–15 years. At 15–16 years the growth of girls decelerates relative to boys. As boys continue to grow from this age their height and their mean IQs increase relative to those of girls. This paper presents new evidence for the theory from the Spanish standardization sample of the fifth edition of the DAT. 1027 boys and 924 girls between 12 and 18 years were tested. The general trend shows that girls do better at the younger ages and their performance declines relative to boys among older age groups, which supports the developmental theory. The sex difference for the DAT as a whole for 18 year olds is a 4.3 IQ advantage for boys, very close to the advantage that can be predicted from their larger brain size (4.4 IQ points). The profile of sex differences in abilities among the Spanish sample is closely similar to that in the United States and Britain, which is testimony to the robustness of the difference in these different cultures.
Sex differences in brain size, stature and intelligence in children and adolescents: some evidence from Estonia Original Research Article
Personality and Individual Differences, Volume 29, Issue 3, 1 September 2000, Pages 555-560
Richard Lynn, Juri Allik, Olev Must
Abstract
Sex differences in brain size and stature decrease from the age of 7 through 13–14 years and increase from the age of 15 through 18 years in Estonia, as they do in the United States. Sex differences in intelligence show a somewhat similar decrease and increase although they do not move precisely in synchrony with the morphological trends. The results are interpreted as suggesting that sex differences in maturation determine the magnitude of sex differences in physical and mental development during childhood and adolescence.
Do sex differences in a faceted model of fluid and crystallized intelligence depend on the method applied? Original Research Article
Intelligence, Volume 38, Issue 1, January-February 2010, Pages 101-110
Ricarda Steinmayr, André Beauducel, Birgit Spinath
Abstract
Recently, different methodological approaches have been discussed as an explanation for inconsistencies in studies investigating sex differences in different intelligences. The present study investigates sex differences in manifest sum scores, factor score estimates, and latent verbal, numerical, figural intelligence, as well as fluid and crystallized intelligence as measured by the German Intelligence-Structure-Test 2000-R (IST 2000-R; Liepmann, Beauducel, Brocke, & Amthauer, 2007). The not population-representative sample consisted of 977 German 11th and 12th graders enrolled in a “Gymnasium” (551 female; mean age: M = 16.70; SD = 0.65) who completed the IST 2000-R. Sex differences in fluid and crystallized intelligence were not influenced by the method applied with men performing better than women. However, extent and direction of sex differences in verbal, numerical, and figural intelligence differed by the method applied. Whereas there was a male advantage in all three factors measured as manifest sum scores, women performed better in verbal intelligence as measured by factor scores or as latent variables. Effect sizes of sex differences in numerical and figural intelligence were also greatly reduced when applying the latter two methods. Results are discussed with regard to their theoretical and practical implications.
Factor structure and sex differences on the Wechsler Preschool and Primary Scale of Intelligence in China, Japan and United States Original Research Article
Personality and Individual Differences, Volume 50, Issue 8, June 2011, Pages 1222-1226
Jianghong Liu, Richard Lynn
Abstract
This study presents data on the factor structure of the Wechsler Preschool and Primary Scale of Intelligence (WPPSI) and sex and cultural differences in WPPSI test scores among 5- and 6-year-olds from China, Japan, and the United States. Results show the presence of a verbal and nonverbal factor structure across all three countries. Sex differences on the 10 subtests were generally consistent, with a male advantage on a subtest of spatial abilities (Mazes). Males in the Chinese sample obtained significantly higher Full Scale IQ scores than females and had lower variability in their test scores. These observations were not present in the Japan and United States samples. Mean Full Scale IQ score in the Chinese sample was 104.1, representing a 4-point increase from 1988 to 2004.
A longitudinal study of sex differences in intelligence at ages 7, 11 and 16 years Original Research Article
Personality and Individual Differences, Volume 51, Issue 3, August 2011, Pages 321-324
Richard Lynn, Satoshi Kanazawa
Abstract
This paper presents the results of a longitudinal study of sex differences in intelligence as a test of Lynn’s (1994) hypothesis that from the age of 16 years males develop higher average intelligence than females. The results show that at the ages of 7 and 11 years girls have an IQ advantage of approximately 1 IQ point, but at the age of 16 years this changes in the same boys and girls to an IQ advantage of 1.8 IQ points for boys.
Intelligence and neural efficiency: Further evidence of the influence of task content and sex on the brain–IQ relationship Original Research Article
Cognitive Brain Research, Volume 25, Issue 1, September 2005, Pages 217-225
Aljoscha C. Neubauer, Roland H. Grabner, Andreas Fink, Christa Neuper
Abstract
In the field of physiological study of human intelligence, strong evidence of a more efficient operation (i.e., less activation) of the brain in brighter individuals (the neural efficiency hypothesis) can be found. Most studies in this field have used single, homogeneous tasks and have not examined sex differences. In analyzing the extent of Event-related Desynchronization (ERD) in the EEG during the performance of a verbal and a visuo-spatial task, we recently found that males and females display neural efficiency primarily in the domain where they usually perform better (i.e., verbal in females and spatial in males; cf. A.C. Neubauer, A. Fink, D.G. Schrausser, Intelligence and neural efficiency: the influence of task content and sex on brain–IQ relationship. Intelligence, 30 (2002) 515–536). However, this interpretation was complicated by differences in the complexity of the two tasks. By using a verbal (semantic) and a spatial (rotation) task of comparable complexity in this research, we sought to replicate and extend our earlier findings by additionally considering the individual differences in intelligence structure and the topographical distribution over the cortex. Findings were similar to the previous study: Females (n = 35) display neural efficiency (i.e., less brain activation in brighter individuals) primarily during the verbal task, males (n = 31) in the spatial task. However, the strength of this brain activation–IQ relationship varies with the intelligence factor: In males, the highest correlations were observed for spatial IQ, in females for verbal IQ. Furthermore, the sexes displayed topographical differences of neural efficiency patterns.
Sex differences in mental abilities: g masks the dimensions on which they lie Original Research Article
Intelligence, Volume 35, Issue 1, January-February 2007, Pages 23-39
Wendy Johnson, Thomas J. Bouchard Jr.
Abstract
Empirical data suggest that there is at most a very small sex difference in general mental ability, but men clearly perform better on visuospatial tasks while women clearly perform better on tests of verbal usage and perceptual speed. In this study, we integrated these overall findings with predictions based on the Verbal–Perceptual–Rotation (VPR) model ([Johnson, W., and Bouchard, T. J. (2005a). Constructive replication of the visual–perceptual–image rotation (VPR) model in Thurstone’s (1941) battery of 60 tests of mental ability. Intelligence, 33, 417–430.; Johnson, W., and Bouchard, T. J. (2005b). The structure of human intelligence: It’s verbal, perceptual, and image rotation (VPR), not fluid and crystallized. Intelligence, 33. 393–416.]) of the structure of mental abilities. We examined the structure of abilities after removing the effects of general intelligence, identifying three underlying dimensions termed rotation–verbal, focus–diffusion, and memory. Substantial sex differences appeared to lie along all three dimensions, with men more likely to be positioned towards the rotation and focus poles of those dimensions, and women displaying generally greater memory. At the level of specific ability tests, there were greater sex differences in residual than full test scores, providing evidence that general intelligence serves as an all-purpose problem solving ability that masks sex differences in more specialized abilities. The residual ability factors we identified showed strong genetic influences comparable to those for full abilities, indicating that the residual abilities have some basis in brain structure and function.
Sex, masculinity—feminity, and intelligence Original Research Article
Intelligence, Volume 1, Issue 2, April 1977, Pages 218-233
George S. Welsh, Donald H. Baucom
Abstract
Masculine and feminine subgroups of males and females were selected from samples of high school and college students on the basis of composite scores from several M—F scales. They were compared on intelligence as measured by a verbal test, Terman’s Concept Mastery Test, and a nonverbal test, D-48. Results did not support previous findings of sex differences in intelligence but showed that masculine subgroups of both sexes scored higher of the nonverbal test.
Sex differences in mental rotation and spatial visualization ability: Can they be accounted for by differences in working memory capacity? Original Research Article
Intelligence, Volume 35, Issue 3, May-June 2007, Pages 211-223
Scott Barry Kaufman
Abstract
Sex differences in spatial ability are well documented, but poorly understood. In order to see whether working memory is an important factor in these differences, 50 males and 50 females performed tests of three-dimensional mental rotation and spatial visualization, along with tests of spatial and verbal working memory. Substantial differences were found on all spatial ability and spatial working memory tests (that included both a spatial and verbal processing component). No significant differences were found in spatial short-term memory or verbal working memory. In addition, spatial working memory completely mediated the relationship between sex and spatial ability, but there was also a direct effect of sex on the unique variance in three-dimensional rotation ability, and this effect was not mediated by spatial working memory. Results are discussed in the context of research on working memory and intelligence in general, and sex differences in spatial ability more specifically.
Sex differences on the WISC-R in Mauritius Original Research Article
Intelligence, Volume 33, Issue 5, September-October 2005, Pages 527-533
Richard Lynn, Adrian Raine, Peter H. Venables, Sarnoff A. Mednick, Paul Irwing
Abstract
Sex differences on the WISC-R (Wechsler Intelligence Scale for Children-Revised) are examined in a sample of 1258 11 year olds in Mauritius. Boys obtained a significantly higher Full Scale IQ by 5.8 IQ points. Boys obtained a higher Performance IQ by 6.5 IQ points and a higher Verbal IQ by 1.0 IQ points. On the subtests, girls obtained a significantly higher mean on Coding while boys obtained significantly higher means on Similarities, Picture Completion, Block Design, Object Assembly and Mazes. There was no significant sex difference on Digit Span. Two methods were adopted for determining whether boys had an advantage on Spearman’s g. First, calculated from the first principal component of a principal components analysis, boys had an advantage on Spearman’s g of 6.15 IQ points. Second, using the method of entering the sex difference on each of the subtests as point-biserial correlations, including these in the full matrix of subtest correlations for factor analysis and examining the factor loading of sex on g produced a correlation between sex and g of .224, the equivalent of a sex difference of 6.9 IQ points. Thus the sex difference on the Full Scale IQ was found to be a good approximate measure of the difference in g. The pattern of sex differences in Mauritius is compared with that in eight other countries and found to be generally similar, although the boys’ advantage is greater in Mauritius than elsewhere. The variance in boys is slightly greater than in girls, but is only significant for Block Design.
Intelligence, sex and psychomotor performance Original Research Article
Personality and Individual Differences, Volume 3, Issue 4, 1982, Pages 457-459
Jitendra Mohan, Meena Sehgal, Anuradha Bhandari
Abstract
This experiment investigated the effect of intelligence and sex on two simple psychomotor performance tests—Backward Figure Writing (BFW) and Backward Alphabet Writing (BAW) in 180 high-school students (90 boys and 90 girls). Three levels of intelligence, high, medium and low were taken. Ss being first matched on Extraversion and Neuroticism. Each S worked for 5 min in pre-test period, rested for 1 min and again worked for 2 min in post-rest period. Results indicated that in pre- and post-rest BFW, increase in speed of response was a direct function of increase in intelligence. Similar results were obtained in pre-rest BAW. In post-rest BAW, however, highest performance scores were obtained by the group, average in intelligence, followed by high and low intelligence groups. Sex did not emerge as a significant determiner of performance in BFW. In BAW, means favoured boys in both pre- and post-rest conditions and the F-ratio for sex emerged significant in post-rest BAW only. None of the interactions emerged as significant. The comparison of effects in two independent variables indicated the task-specific nature of various psychomotor tasks.
Sex differences on the progressive matrices: A meta-analysis Original Research Article
Intelligence, Volume 32, Issue 5, September-October 2004, Pages 481-498
Richard Lynn, Paul Irwing
Abstract
A meta-analysis is presented of 57 studies of sex differences in general population samples on the Standard and Advanced Progressive Matrices (SPM and APM, respectively). Results showed that there is no difference among children aged 6–14 years, but that males obtain higher means from the age of 15 through to old age. Among adults, the male advantage is 0.33d equivalent to 5 IQ points. These results disconfirm the frequent assertion than there are no sex differences on the progressive matrices and support a developmental theory that a male advantage appears from the age of 15 years. A meta-analysis of 15 studies of child samples on the Colored Progressive Matrices showed that among children aged 5–11 years boys have an advantage of 0.21d equivalent to 3.2 IQ points.
Sex differences on three factors identified in Raven’s Standard Progressive Matrices Original Research Article
Intelligence, Volume 32, Issue 4, July-August 2004, Pages 411-424
Richard Lynn, Jüri Allik, Paul Irwing
Abstract
Raven’s Standard Progressive Matrices (SPM) was administered to a sample of 2735 12- to 18-year-olds in Estonia. Both a scree test and the consistent Akaike information criterion (CAIC) indicated the presence of three significant factors. Exploratory and confirmatory factor analysis showed the loadings of the items on the three factors, which were identified as the gestalt continuation found by van der Ven and Ellis [Pers. Individ. Differ. 29 (2000) 45], verbal–analytic reasoning and visuospatial ability. Further analysis of the three factors showed a higher order factor identifiable as g. Examination of age by sex differences showed that on all four factors girls performed better than boys at the age of 12, there was no sex difference at age 14, while boys performed better than girls at the age of 17, although not significantly on visuospatial ability.
Sex differences in intelligence and brain size: A paradox resolved Original Research Article
Personality and Individual Differences, Volume 17, Issue 2, August 1994, Pages 257-271
Richard Lynn
Abstract
Males have larger brains than females, even when corrected for body size, and brain size is positively correlated with intelligence. This leads to the expectation that males should have higher average levels of intelligence than females. Yet the consensus view is that there is no sex difference in general intelligence. An examination of the literature shows that the consensus view is wrong. Among adults, males have slightly higher verbal and reasoning abilities than females and a more pronounced superiority on spatial abilities. If the three abilities are combined to form general intelligence, the mean for males is 4 IQ points higher than the mean for females. Among children up to the age of around 14 yr the sex differences are smaller because girls mature earlier than boys. The evolutionary selection pressures responsible for greater intelligence in males are discussed.
Sex differences in latent general and broad cognitive abilities for children and youth: Evidence from higher-order MG-MACS and MIMIC models Original Research Article
Intelligence, Volume 36, Issue 3, May-June 2008, Pages 236-260
Matthew R. Reynolds, Timothy Z. Keith, Kristen P. Ridley, Puja G. Patel
Abstract
Sex differences in the latent general and broad abilities underlying the Kaufman Assessment Battery for Children—Second Edition (KABC-II) were investigated for children and youth ages 6 through 18. The data were split into different age groups to account for changes due to differential development. Multi-group higher-order analysis of mean and covariance structures (MG-MACS) and multiple indicator-multiple cause (MIMIC) models were used to analyze these data. Boys consistently demonstrated a significant mean advantage on the latent visual–spatial ability (Gv) factor. A significant mean advantage was also found for boys on the latent crystallized ability (Gc) factor at all ages except for 17 and 18. Girls scored higher on the latent, higher-order g factor, at all ages, although this difference was statistically significant at only two age levels. An additional test, however, did not reveal a significant Age × Sex interaction effect, suggesting only main effects of Sex on Gv, Gc, and g.
Sex differences on the Progressive Matrices are influenced by sex differences on spatial ability Original Research Article
Personality and Individual Differences, Volume 37, Issue 6, October 2004, Pages 1289-1293
Roberto Colom, Sergio Escorial, Irene Rebollo
Abstract
The Progressive Matrices Test (PM) is considered an excellent measure of general intelligence or g. There are several studies showing that, on average, males score higher than females on the PM. However, some investigations have demonstrated that there are no sex differences in g. Why are there these contradictory findings? The visuo-spatial format of the PM could be favourable to the male performance, because (on average) males score higher than females on overall spatial ability. The present study administered the Advanced Progressive Matrices Test (APM) and the Spatial Rotation Test from the Primary Mental Abilities Battery (PMA) to a sample of 239 university undergraduates. Males outperformed females on both tests. However, the male advantage on the APM turned out to be non-significant when sex differences on spatial rotation were statistically controlled. It is suggested that sex differences on the PM could be a by-product of its visuo-spatial format.
In a Scottish standardisation sample of the Wechsler Adult Intelligence Scale-Revised, men have a mean IQ of 105.09 and women of 100.00. The higher average mean obtained by men is consistent with four other standardisation samples of the WAIS and WAIS-R.
Sex differential item functioning in the Raven’s Advanced Progressive Matrices: evidence for bias Original Research Article
Personality and Individual Differences, Volume 36, Issue 6, April 2004, Pages 1459-1470
Francisco J. Abad, Roberto Colom, Irene Rebollo, Sergio Escorial
Abstract
There are no sex differences in general intelligence or g. The Progressive Matrices (PM) Test is one of the best estimates of g. Males outperform females in the PM Test. Colom and García-López (2002) demonstrated that the information content has a role in the estimates of sex differences in general intelligence. The PM test is based on abstract figures and males outperform females in spatial tests. The present study administered the Advanced Progressive Matrices Test (APM) to a sample of 1970 applicants to a private University (1069 males and 901 females). It is predicted that there are several items biased against female performance, by virtue of their visuo-spatial nature. A double methodology is used. First, confirmatory factor analysis techniques are used to contrast one and two factor solutions. Second, Differential Item Functioning (DIF) methods are used to investigate sex DIF in the APM. The results show that although there are several biased items, the male advantage still remains. However, the assumptions of the DIF analysis could help to explain the observed results.
Sex differences on the WISC-R in New Zealand Original Research Article
Personality and Individual Differences, Volume 39, Issue 1, July 2005, Pages 103-114
Richard Lynn, David M. Fergusson, L. John Horwood
Abstract
Sex differences on the WISC-R were examined in a sample of 897 New Zealand children studied at ages 8 and 9 years. Boys scored significantly higher than girls on the subtests of information, vocabulary, block design and object assembly, while girls scored significantly higher on coding. Boys obtained slightly but not significantly higher scores on the verbal, performance and full scale IQs. The results were in general similar to the sex differences in the standardisation samples of the WISC-R in Scotland, the Netherlands and the United States.
Sex ratios in the most-selective elite US undergraduate colleges and universities are consistent with the hypothesis that modern educational systems increasingly select for conscientious personality compared with intelligence
Medical Hypotheses, Volume 73, Issue 2, August 2009, Pages 127-129
Bruce G. Charlton
Abstract
Summary
The main predictors of examination results and educational achievement in modern societies are intelligence (IQ – or general factor ‘g’ intelligence) and the personality trait termed ‘Conscientiousness’ (C). I have previously argued that increased use of continuous assessment (e.g. course work rather than timed and supervised examinations) and increased duration of the educational process implies that modern educational systems have become increasingly selective for the personality trait of Conscientiousness and consequently less selective for IQ. I have tested this prediction (in a preliminary fashion) by looking at the sex ratios in the most selective elite US universities. My two main assumptions are: (1) that a greater proportion of individuals with very high intelligence are men than women, and (2) that women are more conscientious than men. To estimate the proportion of men and women expected at highly-selective schools, I performed demonstration calculations based on three plausible estimates of male and female IQ averages and standard deviations. The expected percentage of men at elite undergraduate colleges (selecting students with IQ above 130 – i.e. in the top 2% of the population) were 66%, 61% and 74%. When these estimates were compared with the sex ratios at 33 elite colleges and universities, only two technical institutes had more than 60% men. Elite US colleges and universities therefore seem to be selecting primarily on the basis of something other than IQ – probably conscientiousness. There is a ‘missing population’ of very high IQ men who are not being admitted to the most selective and prestigious undergraduate schools, probably because their high school educational qualifications and evaluations are too low. This analysis is therefore consistent with the hypothesis that modern educational systems tend to select more strongly for Conscientiousness than for IQ. The implication is that modern undergraduates at the most-selective US schools are not primarily an intelligence elite, as commonly assumed, but instead an elite for Conscientious personality.
Sex differences in g: An analysis of the US standardization sample of the WAIS-III Original Research Article
Personality and Individual Differences, In Press, Corrected Proof, Available online 31 May 2011
Paul Irwing
Abstract
This study employed both hierarchical and Bi-factor multi-group confirmatory factor analysis with mean structures (MGCFA) to investigate the question of whether sex differences are present in the US standardization sample of the WAIS-III. The data consisted of age scaled scores from 2450 individuals aged from 16 to 89 years. The findings were more or less uniform across both analyses, showing a sex difference favoring men in g (0.19–0.22d), Information (0.40d), Arithmetic (0.37–0.39d) and Symbol Search (0.40–0.30d), and a sex difference favoring women in Processing Speed (0.72–1.30d).
Sex differences on elementary cognitive tasks despite no differences on the Wonderlic Personnel Test Original Research Article
Personality and Individual Differences, Volume 45, Issue 5, October 2008, Pages 429-431
Bryan J. Pesta, Sharon Bertsch, Peter J. Poznanski, William H. Bommer
Abstract
Whether males and females differ in general mental ability (GMA) remains an open question. Complicating the issue is that standardized IQ tests are constructed to minimize sex differences. We propose a potential solution whereby GMA is measured via performance on elementary cognitive tasks (ECTs). ECTs assess basic information-processing ability, yet correlate moderately highly with GMA. Toward this end, we had male (n = 218) and female (n = 226) undergraduates complete the Wonderlic Personnel Test (WPT), and two ECTs: inspection time (IT) and reaction time (RT). The sex difference on the WPT was non-significant (d = .17), but small differences favoring males existed for IT (d = .34), RT (d = .26), the standard deviation of RT (d = .30), and an ECT factor score (d = .38). Unlike standardized IQ tests, ECTs may be a viable research tool to help clarify and illuminate the nature of sex differences on GMA.
Sex differences on the progressive matrices among adolescents: some data from Estonia Original Research Article
Personality and Individual Differences, Volume 36, Issue 6, April 2004, Pages 1249-1255
Richard Lynn, Juri Allik, Helle Pullmann, Kaia Laidra
Abstract
It has long been asserted that there are no sex differences on the Progressive Matrices. Contrary to this position, it has been contended by Lynn (1994, 1998) that there is a small difference favoring females from the age of approximately 9–14 years, and a difference favouring males from the age of 16 onwards, reaching approximately 2.4 IQ points among adults. Data to test these two theories are reported from a standardization of the Progressive Matrices on a sample of 2689 12–18 year olds in Estonia. The results confirm the Lynn theory and show a female advantage of 3.8 IQ points among 12–15 year olds and a male advantage of 1.6 IQ points among 16–18 year olds. Boys had a significantly larger standard deviation than girls. The results provide further confirmation that in early adolescence girls outperform boys on abstract (non-verbal) reasoning ability but that in later adolescence boys outperform girls.
Sex differences on the progressive matrices among 15–16 year olds: some data from South Africa Original Research Article
Personality and Individual Differences, Volume 33, Issue 4, September 2002, Pages 669-673
Richard Lynn
Abstract
It has been widely asserted that there is no sex difference in mean scores on the Progressive Matrices. This paper presents an alternative theory that a male advantage on the test begins to appear at the age of 15 years. This alternative theory is supported by data for the largest sample hitherto reported consisting of 3979 15–16 year olds in South Africa. In this sample males obtained a significantly higher mean equivalent to 2.35 IQ points among 15 year olds and to 4.65 IQ points among 16 year olds.
Personality and Individual Differences, Volume 36, Issue 4, March 2004, Pages 779-787
Richard Lynn, Eduardo Backhoff, Luis A. Contreras-Niño
Abstract
Normative data for sex differences on the Standard Progressive Matrices are presented for a sample of nine-hundred and twenty 7–10 year olds in Mexico. Factor analysis of the test showed the presence of factors identifiable as g, reasoning ability and visualisation. There was no statistically significant difference between boys and girls on the test, on g, or on reasoning. There was, however, a significant advantage for boys on the visualisation factor. There was also a non-significant trend for the boys’ advantage on the test to decline over the 4 years and to turn into an advantage for girls at age 10. This is consistent with the faster maturation of girls from the age of about 10 through 15 years.
Sex differences on the Dutch WAIS-III Original Research Article
Intelligence, Volume 34, Issue 3, May-June 2006, Pages 273-289
Sophie van der Sluis, Danielle Posthuma, Conor V. Dolan, Eco J.C. de Geus, Roberto Colom, Dorret I. Boomsma
Abstract
Summarizing, the present study showed that males and females do differ with respect to specific cognitive abilities, but that g cannot be viewed as the sour
Ich eröffne dazu mal einen eigenen Betrag zur Übersichtlichkeit der Disskussion.