Sexual and gender identity disorder: full range of human sexual thoughts, feelings and actions that are generally regarded as abnormal and dysfunctional. Gender identity: our sense of ourselves as male or female. Gender identity disorder or transsexualism: they feel deep within themselves (usually from early childhood) that they are of the opposite sex. They may want to pass as a member of the opposite sex or even have surgery. When gid begins in childhood it"s associated with cross-gender behaviours dressing in opposite-sex clothes, preferring opposite-sex playmates, and engaging in play that would be more typical of the opposite sex. Gid is associated with a developmental lag in achieving a sense of gender constancy or stability. They are usually recognized by their parents at age 2-4. Gid is 6. 6x more frequent in boys than girls (zucker) factors associated with decision to seek clinical assessment. Belief that the behaviour was no longer a phase that the child would grow out of.