An individual's internal sense of being male, female, both, neither, or another gender entirely. This psychological sense of self typically develops by age 3-4 and may or may not align with biological sex assigned at birth.
The term emerged in the 1960s, combining 'gender' from Latin 'genus' (kind, type) and 'identity' from Latin 'identitas' (sameness). Psychologist John Money helped distinguish gender (psychological/social) from sex (biological), leading to the concept of gender identity as separate from physical characteristics.
Gender identity is like having an internal GPS for your sense of self - most people never think about it because it matches their body and social expectations, but for some, there's a persistent mismatch that can't be ignored! It typically solidifies very early, often before children can even articulate what gender means.
Gender identity terminology evolved primarily through trans and non-binary self-advocacy (1990s–present); medical/psychological fields historically pathologized non-cisgender identity, treating it as disorder rather than natural human variation.
Recognize gender identity as distinct from sex assigned at birth and biological sex; affirm that gender identity exists across a spectrum and is self-determined, not clinician-assigned.
["gender self-identification"]
Trans and non-binary communities developed gender identity frameworks through lived experience and activism; current affirmative psychology largely reflects their epistemic contributions, not solely clinical expertise.
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