cycle and has been linked to violence, aggression, and changes in cognitive
functioning. One study shows that men’s testosterone levels decrease when
they become fathers, which may increase their nurturing tendencies.
3.
Both men and women experience changes in their hormonal levels over time.
Men’s testosterone levels begin gradually decreasing around age 30.
D.
Brain structure and development is a third focus of biological theories.
1.
While research has shown that women and men use both the right and left
lobes of their brains, the sexes tend to specialize in using different lobes.
a.
Men tend to emphasize left brain functioning, responsible for
traditionally linear, logical thought and abstract, analytical thinking.
b.
Women tend to emphasize right brain functioning, responsible for
imaginative, artistic, and intuitive thinking and some visual and spatial
functions.
c.
The prefrontal cortex, which restrains aggression, is larger and
develops earlier in women than men. For women, the insula, which
affects intuition and empathy, is larger, while for men, the amygdala,
which is the center for emotions such as anger and fear, is larger.
2.
The corpus callosum joins the two sides of the brain and has been shown to
be more highly developed in women. This structure generally allows
women the greater ability to cross from one lobe to the other.
3.
Most differences in the sexes’ brains are absent or very small at birth and
tend to increase as individuals age.
E.
Biological classification into male or female is not as clear-cut as many people
think. The term gender binary refers to the division of humans into two sexes that
are presumed to be opposite, distinct, and natural.
1.
One of the earliest challenges to the gender binary came from research on
intersex people. Other research has noted that there is more variation within
each socially defined sex than between the two.
2.
The term genderqueer was developed to signify identities outside of the
gender binary.
III.
Interpersonal Theories of Gender
A.
Psychodynamic Theories of Gender Development
1.
Psychodynamic theories argue that the first relationship we have influences
how we define our identity, including our gender.
2.
Since the primary caretaker for most infants is the mother, she provides a
fundamental influence on later self-definition and how interactions with
others are understood.
a.
The mother, as a gendered being herself, may act differently toward
sons and daughters based on her social views of boys and girls.
b.
There is a fundamental likeness between mothers and daughters,
which creates closer identification.
c.
Sons must establish an independent identity from their
mothers.
3.
According to psychodynamic theories, the identity formed in infancy remains
core to the self. So, infants carry the basic identity formed in the pivotal first