Exam 2 Chapter 5 Flashcards
(90 cards)
Twin studies and environment vs genes (3)
1) Greater correspondence between mono/dizygotic twins, and greater difference between dizygotic and siblings.
2) Genetics and environment both were contributing factors to sex-typed behavior, but genetic was stronger for F
3) Atypical behavior was moderately genetic, substantially environmental, also stronger for F
What is an argument for environment and twins?
Identical twins are put into an environment that looks specifically and similarities (self-fufulling prophecy)
Aggression and Biology (2)
1) Monozygotic are more likely than dizygotic,
2) Genetics accounted for 40% of antisocial behavior (delinquency, criminal behavior, behavioral aggression)
Adoption studies and bio
Bio rather than adopted show greater similarity in family functioning and antisocial behavior
Sex-related chromosomal abnormalities
An extra y chromosome on men might be at fault, but prison population doesn’t have extra y chromosome and parents who know may be biased
Conditions where there is some inconsistency between chromosomal sex and phenotypical sex
Intersex conditions (ambitious, or pats)
Genetic disorder resulting from a malfunction in the adrenal gland that results in prenatal exposure to high levels of hormones and lack of cortisol
(CAH) Congenital Adrenal Hyperplasia
CAH affects on gender (1, spatial and facial, 2, social behavior)
1) F who are exposed have better spatial skills, but boys with CAH have worse. CAH females and non CAH males are similar in response to facial emotions
2) CAH girls and males are similar in high aggression, CAH males and non no difference, same effect with CAH females and male toys
CAH and homosexuality
CAH majority is hetero but the degree of exposure is whats linked to homo, and none of this seems to be associated with gender identity problems
CAH and spatial skills explanation (3)
1) Self fulfilling prophecy- parents expect high levels of androgens and provide masculine toys.
2) Androgens promote active behavior which can lead to sports (masculine)
3) Androgens can affect areas of the brain that are linked to spatial skills, masculine behavior, and sexual orientation
What are three links to higher testosterone in prenatal amniotic fluid? (3)
1) Male typical play behavior in f and m
2) greater lateralization of language in m and f
3) less empathy
Testosterone applied to healthy women in study did _____
improved mental rotation
Men who received testosterone in economics game were_____
less generous, and higher levels of punishment w/ competitor
CAIS (Androgen insensitivity) and normal f
no difference in gender related or personality traits. This case supports that hormones override genetics (cut out testes keep vag)
Estrogen studies and prenatal exposure
There seems to be no difference, however, more exposure has larger effect. Also there are different critical periods. M may feel the overwhelming pressure to adhere to M role
Hemispheres of brain F and M
Women’s brains are more bilateral (easy to cross over), men are more lateralized (distinct functions)
Corpus Callosum and Gender
Women might have a larger one than men
Hypothalamic Nucleus and Gender Identity
M to F trans had this more similar to F
Although the differences are not 100% twin studies show genes play a role in ____, _____,and _____.
Sex differences, gender-related behavior, social behavior
The strongest evidence for links of sex hormones to cognition and behavior is in research that has show
Prenatal exposure to male hormones (androgens) is associated with enhanced spatial skills and male gender-role behavior in women
The major problem with most studies in the relations of hormones to behavior are
Correlational, thus cause and effect cannot be established. Some recent studies have begun to manipulate hormones, specifically testosterone
Studies of the brain have shown sex differences in
Structure
In sum, biological theories leave open to the explanation that
There is much variability in the behavior of M and F
According to evolutionary psych, men act to ensure ___ and women to ____
Paternity, survive