title: Testosterone levels and spatial ability in men.
abstract: Testosterone (T) levels were measured by salivary assays in 59 males at times of the day when T was expected to be highest and lowest. Relationships were evaluated for mean hormone levels across the two sessions and hormone level changes between sessions with performance on three-dimensional mental rotations, a spatial test which customarily favours males. An anagrams task and the digit symbol test were used as controls. Mental rotations scores showed a significant positive relationship with mean T levels but not with changes in T. There were no significant relationships between control test scores and mean T levels. Findings are discussed in terms of their contributions to the resolution of ambiguities in prior reported data.
authors.affiliation: Department of Psychology, York University, Toronto, Ont., Canada. isilv@yorku.ca
authors.forename: I
authors.initials: I
authors.lastname: Silverman
authors.forename: D
authors.initials: D
authors.lastname: Kastuk
authors.forename: J
authors.initials: J
authors.lastname: Choi
authors.forename: K
authors.initials: K
authors.lastname: Phillips
mesh_terms: D000328:Adult; D001076:Aptitude / Q000502:physiology*; D002940:Circadian Rhythm; D003867:Depth Perception / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D009949:Orientation / Q000502:physiology*; D010364:Pattern Recognition, Visual / Q000502:physiology; D011340:Problem Solving / Q000502:physiology; D012463:Saliva / Q000378:metabolism; D012727:Sex Characteristics; D013028:Space Perception / Q000502:physiology*; D013739:Testosterone / Q000378:metabolism*
chemical_list: D013739:Testosterone