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Stéréotypes de Genre: Impact sur la Cognition (mathématiques/raisonnement/ habiletés visuo-spatiales) Pascal Huguet Directeur de Recherche Laboratoire de Psychologie Sociale et Cognitive (LAPSCO UMR 6024) Université Blaise Pascal et CNRS [email protected]

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Page 1: Stéréotypes de Genre: Impact sur la Cognition ... EN LIGNE/16...Huguet, Maltese, Polderman, Carlier, & Boomsma (in preparation) We re-examined the role of prenatal exposure to testosterone

Stéréotypes de Genre: Impact sur la Cognition

(mathématiques/raisonnement/ habiletés visuo-spatiales)

Pascal Huguet

Directeur de Recherche Laboratoire de Psychologie Sociale et Cognitive

(LAPSCO UMR 6024) Université Blaise Pascal et CNRS

[email protected]

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Stéréotypes de Genre: Impact sur la Cognition

(mathématiques/raisonnement/ habiletés visuo-spatiales)

Pascal Huguet

Directeur de Recherche Laboratoire de Psychologie Sociale et Cognitive

(LAPSCO UMR 6024) Université Blaise Pascal et CNRS

[email protected]

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Les stéréotypes sociaux

  Croyances partagées—à des degrés divers—à propos des attributs ou des caractéristiques (capacités intellectuelles, etc) de certains groupes sociaux.   Fondées sur un processus de catégorisation

sociale fonctionnel (dans ses deux aspects: inductif et déductif) mais simplificateur !

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Assimilation et Contraste  Effet d’assimilation: amplification des similitudes (perçues ou attendues) entre les membres d’une même catégorie…   Effet de contraste: amplification des différences (perçues ou attendues) entre les membres de deux catégories différentes…

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Infériorité supposée des femmes en mathématiques …

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… ne savent pas lire les cartes routières…

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Pink Parking Spaces ! (South Korea)

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Stress émotionnel…

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stéréotypes liés au vieillissement

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stéréotypes liés au vieillissement

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Processus de généralisation  Fond de vérité?   Généralisations donc erreurs probables puisque la diversité est la règle du vivant!

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Underrepresentation of Women in STEM Fields (EU-15)

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Underrepresentation of Women in STEM Fields

and Scientific Boards (EU-15)

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« Procès » en Incompétences

  En matière de prise de responsabilité, de capacité décisionnelle, et de leadership …   Mais aussi, plus fondamentalement, en

matière de pensée rationnelle, d’où aussi cette idée d’une infériorité intrinsèque des femmes en mathématiques, en sciences, et dans les activités impliquant un raisonnement logique …

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Femmes et Maths…

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Lawrence H. Summers Président de Harvard University

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Scholastic Aptitude Test-Maths (SAT-M) exemple

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Camilla Benbow Vice chair of the National Math Advisory Panel (White House) Member of the National Science Board

 Dans les hauts niveaux de performance (> 700 points au SAT-M), plus d’hommes que de femmes…

 Causes en partie d’origine biologique (exposition pré-natale à la testostérone).

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Claude Steele: rôle des stéréotypes

Infériorité liée à l’intervention d’un stéréotype négatif (obstacle supplémentaire auquel ne sont pas confrontés les hommes).

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Spencer, Quinn, & Steele (1999), JESP(SAT-M items difficiles)

0

5

10

15

20

25

30

"sex difference" "no sex difference"

Perf

orm

ance

(SAT

-M)

Women men

Fig 1. Sex x Context interaction (p < .05)

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Spencer, Quinn, & Steele (1999), JESP(SAT-M items difficiles)

0

5

10

15

20

25

30

No information "no sex difference"

Perf

orm

ance

(SAT

-M)

Women Men

Fig 2. Sex x Context interaction (p < .05)

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Figure Complexe de Rey-Osterrieth (version expérimentale)

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Stéréotype de genre et performances cognitives Huguet & Régner (2007), JEP, 99, 545-560.

  20 filles et 20 garçons (11-13 ans) tous en réussite en Maths/Géométrie (au minimum 14/20 au 2ème trimestre -- juste avant l’étude).

  Test de la figure complexe en passation individuelle au collège.

  Test présenté comme un « Test de Géométrie » versus un « Jeu de Mémoire ».   50 sec à l’encodage, 5 min au rappel.

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18

19

20

21

22

23

24

25

26

Geometry test Memory game

Perf

orm

ance

(m

ax =

44

pts)

Context

Girls

Boys

Fig 3. Sex x Context interactionF(1, 36) = 8.89, p < .006

Stéréotype de genre et performances cognitives Huguet & Régner (2007), JEP, 99, 545-560.

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20

21

22

23

24

25

26

27

Geometry Drawing

Per

form

ance

(m

ax =

44

pts)

Context

Girls

Boys

Fig 4. Sex x Context interaction F(1, 176) = 11.62, p < .001

En passation collective (par demi-classes)

Stéréotype de genre et performances cognitives Huguet & Régner (2007), JEP, 99, 545-560.

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Un stéréotype peut en cacher un autre…   Les difficultés (et la sous représentation) des

femmes et des filles en maths (comme dans les disciplines scientifiques et techniques) correspondraient notamment à des inégalités en matière d’habiletés visuo-spatiales …

  Les femmes ne savent pas lire les cartes routières!

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Women Can’t Read Maps ?

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3D Mental Rotation Task (MRT)

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Vandenberg and Kuse Mental Rotation Task

« Sur les 4 figures présentées à droite, deux seulement sont identiques à celle présentée à gauche. »

• 20 problèmes en temps limité (6 min). • À chaque essai,1 point est accordé si et seulement si les deux figures choisies sont correctes.

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Rotations mentales d’objets 3D

88,5

99,510

10,511

11,512

Standard Falsification

Perf

orm

ance

/20

Contexte

Filles Garçons

Fig 7. Interaction Sexe x Contexte (p < .05)

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Back to Biological Forces : The Role of Prenatal Exposure to Testosterone in Mental Rotation

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Mental Rotation Ability & Testosterone

 Sex differences favoring males on 3-D mental rotation tests are also thought to be rooted, at least partially, in prenatal exposure to testosterone (Vuoksimaa et al., 2010; Heil et al., 2010)

 In this is true, then females with exposure to higher levels of prenatal testosterone may perform better on 3-D mental rotation tests than females with lower levels of testosterone.

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Prenatal Exposure to Testosterone

 This hypothesis has been examined by comparing females from opposite-sex twin pairs (females with co-twin males) to females from same-sex twin pairs (females with co-twin females)  … assuming that intra-uterine hormonal transfer is operating (no direct evidence so far in humans and very few in other animal species)…  In this approach, females from opposite-sex twin pairs should perform better than females from same-sex twin pairs

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« Having a male Co-Twin Masculinizes Mental Rotation Performance in Females » Vuoksimaa et al., Psych Science (2010)

p <.01; d = .30

ns

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« Mental Rotation in Female Fraternal Twins: Evidence for Intra-Uterine Hormone Transfer »

Heil et al. Biol Psych (2010)

Twins Siblings

ns *

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Limitations…

 Vuoksimaa et al.(2010): The performance context remained unspecified (absolutely no info)… Did participants work alone ? Did they work in presence of their cotwin ?  Heil et al. (2010): The MR test was administered by post (and so self-administered based on specific instructions) …  Both studies left open the question of whether the masculinization hypothesis holds in more controlled conditions.

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Hormonal Transfer vs. Stereotype Threat: An Integrative Study

Huguet, Maltese, Polderman, Carlier, & Boomsma (in preparation)

 We re-examined the role of prenatal exposure to testosterone in 3D mental rotation ability, while manipulating the situational context and controlling for important individual variables (e.g., working memory capacity)

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Method

 Participants : 62 pairs of Dizygotic twins (opposite-sex and same-sex pairs; 19 years-old on average) from the Netherlands Twin Register or recruited from newspapers in France

 Computer-based 3D mental rotation task

 Participants were told (in the lab context) that they would take the same test as their co-twin (condition allowing a comparison with the co-twin) VERSUS a different test (condition preventing comparison with the co-twin), while the test was identical in both conditions J

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Expectations

 According to the masculinization hypothesis: females from opposite-sex twin pairs should perform better than females from same-sex twin pairs in the two conditions (« same test » vs. « different test »)

 According to the stereotype threat hypothesis:

 females from opposite-sex twin pairs in the same task condition (allowing a potentially self-threatening comparison with their brother) should perform lower and also report more anxiety than females from same-sex twin pairs  both groups (females from opposite-sex pairs and females from same-sex pairs) should perform equally well in the different task condition (preventing self-threatening comparisons).

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% Correct Responses

70

75

80

85

90

Same test (potential threat) Different test (no threat)

% c

orre

ct r

espo

nses

DZSS

DZOS

Same Sex

Opposite Sex

Test Characterization

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% Correct Responses

Test Characterization

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Self-Reports of Anxiety

15

20

25

30

Same test (potential threat) Different test (no threat)

Self-

repo

rts o

f anx

iety

DZSS

DZOS Opposite Sex

Same Sex

Test Characterization

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Self-Reports of Anxiety

Test Characterization

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In Short

 Twin findings supporting the prenatal masculinization hypothesis seem difficult to replicate in more controlled (Lab) conditions, to say the least...

 The fact that females from opposite-sex twin pairs underperformed relative to females from same-sex twin pairs (contrary to the prenatal hormone transfer hypothesis) in the condition associated with a potentially threatening social comparison (and only in this condition) lend further support to the ST hypothesis.

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  Interférence repérable chez les femmes contre-stéréotypiques ?

  Quid en particulier des étudiantes MPSI?

Un effet du stéréotype dans Grandes Écoles ?

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  53 femmes et 64 hommes en écoles d’ingénieurs (Toulouse et Marseille)

  Sessions individuelles dans le cadre de l’école.

  Test de raisonnement: « Matrices de Raven » (version la plus

complexe).   Manipulation expérimentale:

  Condition de « falsification du stéréotype »: Les sujets sont informés qu’hommes et femmes obtiennent généralement les mêmes performances sur ce test.   Condition standard: aucune information à l’encontre du stéréotype.

Régner, Smeding, Gimmig, Thinus-Blanc, Monteil, & Huguet (Psychological Science, 2010, 21, 1646-1648)

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Régner, Smeding, Gimmig, Thinus-Blanc, Monteil, & Huguet (Psychological Science, 2010)

0,7

0,72

0,74

0,76

0,78

0,8

0,82

0,84

0,86

0,88

0,9

Standard Falsification

Sco

re d

'exa

ctitu

de

Femmes Hommes

Fig 8. Interaction Sexe x Contexte

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Par conséquent…   Pour réussir en mathématiques/en sciences, les filles

doivent faire face à un obstacle supplémentaire (le stéréotype négatif) auquel ne sont pas confrontés les garçons.

  Cet obstacle explique au moins en partie leur désaffection massive ultérieure (classes préparatoires, universités, grands organismes de recherche) pour les disciplines scientifiques et techniques.

  Les quelques femmes issues des filières MPSI sont contre-stéréotypiques, elles souffrent cependant elles-mêmes du stéréotype négatif.

  L’obstacle subsiste donc jusqu’au bout!

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Merci!

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Une brève évocation des mécanismes au niveau cérébral

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Stereotype threat: fMRI findings

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About the Brain under Stereotype Threat: fMRI findings

 Young men and women from math-intensive classes solved two series of 36 arithmetical equations (96/4 + 19x3 = 81?) under time pressure (8 sec to determine if each equation was true or false).  In one series, they were told that gender differences were expected (stereotype validated condition), whereas in the other series (of equal difficulty) they were told that no gender differences were expected (stereotype invalidated condition)  Series and conditions were counterbalanced

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Huguet, Moretti, Richard, Schneider, & Sirigu (under review)

« 96/4 + 19x3 = 81? » Time pressure: 8 sec

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Stereotype threat: fMRI findings

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Stereotype threat: fMRI findings

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Quant à nos manuels scolaires… Étude du Centre Hubertine Auclert (financé par la région Ile-de-France)

  Seulement 3% de femmes citées parmi les savants et autres « découvreurs »   Idem pour les personnages de fiction imaginés à l'appui des leçons ou des exercices !

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UN PETIT TEST POUR TERMINER …

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… le plus grand mathématicien de tous les temps selon Einstein …

?

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… le plus grand mathématicien de tous les temps selon Einstein …

Emmy Noether (Allemagne 1882-1935)

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Qui se souvient de ?

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Qui se souvient de Mileva Einstein ?

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Qui se souvient de ?

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Qui se souvient de Maria Anna Walburga Ignatia Mozart («nannerl») ?

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Merci!

Page 71: Stéréotypes de Genre: Impact sur la Cognition ... EN LIGNE/16...Huguet, Maltese, Polderman, Carlier, & Boomsma (in preparation) We re-examined the role of prenatal exposure to testosterone

Special Thanks  Dorett Boosma (Prof, Vrije Univ)  Michèle Carlier (Prof, Aix-Marseille Univ)  Laura Moretti (Center for Cognitive Neuroscience, CNRS, Lyon)

  Jean-Marc Monteil (Prof, CNAM-Paris)  Isabelle Régner (Assistant Prof, Soci Psych, Aix-Marseille Univ)  Nathalie Richard (Center for Cognitive Neuroscience, CNRS, Lyon)  Annique Smeding (PhD, Blaise Pascal Univ, France)

  Fabien Schneider (Radiology Department, University Hospital of Saint-Etienne)

  Angéla Sirigu (Center for Cognitive Neuroscience, CNRS, Lyon)  Catherine Thinus-Blanc (Prof, Aix-Marseille Univ)