title: Handedness in boys with gender identity disorder.
abstract: Handedness preference was assessed in 205 boys with gender identity disorder and 205 clinical control boys referred for other reasons. Boys with gender identity disorder were significantly more likely to be left-handed than the clinical control boys (19.5% vs. 8.3%, respectively). The boys with gender identity disorder, but not the clinical control boys, also had a significantly higher rate of left-handedness compared to three independent, general population studies of nonreferred boys (11.8%; N = 14,253) by Hardyck, Goldman, and Petrinovich (1975), Calnan and Richardson (1976), and Eaton, Chipperfield, Ritchot, and Kostiuk (1996). Left-handedness appears to be a behavioral marker of an underlying neurobiological process associated with gender identity disorder in boys.
authors.affiliation: Child and Adolescent Gender Identity Clinic, Centre for Addiction and Mental Health-Clarke Division and University of Toronto, Ontario, Canada. Ken_Zucker@camh.net
authors.forename: K J
authors.initials: KJ
authors.lastname: Zucker
authors.forename: N
authors.initials: N
authors.lastname: Beaulieu
authors.forename: S J
authors.initials: SJ
authors.lastname: Bradley
authors.forename: G M
authors.initials: GM
authors.lastname: Grimshaw
authors.forename: A
authors.initials: A
authors.lastname: Wilcox
mesh_terms: D002648:Child; D002675:Child, Preschool; D007839:Functional Laterality; D005783:Gender Identity; D006801:Humans; D008297:Male; D012494:Sampling Studies; D012727:Sex Characteristics; D019968:Sexual and Gender Disorders / Q000523:psychology*