Sex and gender are not the same
Biological sex means body traits: sex chromosomes (usually XX or XY), hormones such as testosterone and oestrogen, and body parts. A small number of people are intersex: born with body traits that do not fit typical male or female patterns.
Gender is wider. It is the set of roles, traits and identity that a culture and a person link with being a man, a woman, or another gender. Biology plays a part: prenatal hormones affect brain development and some play preferences. But culture shapes a great deal of what counts as 'masculine' or 'feminine'.
How gender identity develops
Gender identity is a person's inner sense of their own gender. Most children can label themselves as a boy or a girl by about 2–3 years. By about 5–7 years they reach gender constancy: they understand gender does not change just because clothes or hair change.
Gender typing is the learning of a traditional masculine or feminine role. Children often follow these rules strictly at around 5–7 and become more flexible later.
For most people, gender identity matches the sex recorded at birth. Transgender people have a gender identity that differs from that sex. Some people describe their identity as non-binary.
Theories: social learning and gender schemas
Social learning theory says children learn gender by watching and copying others (observational learning) and through rewards and punishments. A boy praised for being 'tough' or a girl praised for being 'helpful' will repeat that behaviour.
Gender schema theory says children build mental categories (schemas) about what fits each gender, then use them to sort toys, jobs and traits, and to guide their own choices. Schemas come from the culture around them.
Gender roles are a culture's expectations for men and women. They differ between cultures and change over time: who cooks, who earns, who leads. Androgyny means having a mix of traits seen as masculine and feminine, such as being both assertive and caring; such people often adapt well to different situations.
Sexual orientation
Sexual orientation is a lasting pattern of romantic or sexual attraction: to people of another sex (heterosexual), of the same sex (gay or lesbian), of more than one sex (bisexual), or little or no sexual attraction (asexual).
What research shows:
- Orientation is not chosen and attempts to change it do not work and can cause harm.
- There is no evidence that parenting style, friendships or upbringing cause a person's orientation.
- Biological factors contribute: twin studies show some genetic influence, and prenatal hormones may play a role. No single cause has been found.
Keep three things separate: gender identity (who I am), gender expression (how I show it) and sexual orientation (who I am attracted to). Knowing one does not tell you the others.
How psychologists study this
Psychologists use cross-sectional studies (compare different ages at one time), longitudinal studies (follow the same children for years), observation of play, and cross-cultural comparisons. Twin and adoption studies help separate genes from environment. Good studies protect privacy and use respectful, voluntary participation.
Key formulas and definitions
- Biological sex = body (chromosomes, hormones, anatomy)
- Gender = roles + traits + identity linked by culture and self
- Gender identity by ~2–3 years; gender constancy by ~5–7 years
- Social learning = observe + copy + reward; gender schema = mental sorting rules
- Identity ≠ expression ≠ orientation (three separate dimensions)
Worked examples
1. A 4-year-old says a boy who grows long hair will 'become a girl'. Which idea has the child not yet reached?
Gender constancy, the understanding that gender stays the same despite changes in appearance. It usually develops by about 5–7 years.
2. A girl sees her mother repairing a motorbike and later 'fixes' her toy scooter. Which theory explains this best?
Social learning theory: she observed a model and copied the behaviour.
3. A child refuses a purple bat at a cricket shop, saying 'purple is for girls'. Which theory explains this?
Gender schema theory: the child uses a mental category about colours to decide what fits their own gender.
4. A friend says, 'He likes cooking and dance, so he must be gay.' What is wrong?
It mixes up gender expression and roles with sexual orientation. These are separate dimensions; interests do not tell you who someone is attracted to.
Common mistakes
- Using 'sex' and 'gender' as if they mean the same thing.
- Thinking gender roles are the same in every culture and never change.
- Believing parenting style causes a child's sexual orientation. Research does not support this.
- Assuming a person's interests or style reveal their orientation.