title: Visuospatial/vocabulary differences in boys and girls and a potential age-dependent drift in vocabulary proficiency.
abstract: A total of 188 monolingual (English) boys and girls whose ages ranged from 6 years through 14 years were administered the Vocabulary and Block Design subtests of the Wechsler Intelligence Scale for Children. Although the boys (n = 85) displayed significantly greater relative strengths for the visuospatial task than the girls (n = 103), the effect was due primarily to the boys' less proficient Vocabulary scores. The detection of a significant linear decrease (r = -.32) in standardized scores for Vocabulary but not for Block Design over this age span was not expected. The drift over 9 grades was equivalent to more than one standard deviation. Possible sources of interference such as exposure to the same second language that occupied 6% to 12% of the instructional time are suggested.
authors.affiliation: Laurentian University, Sudbury, Ontario, Canada.
authors.forename: J A
authors.initials: JA
authors.lastname: Moulden
authors.forename: M A
authors.initials: MA
authors.lastname: Persinger
mesh_terms: D000293:Adolescent; D002648:Child; D005260:Female; D005783:Gender Identity; D006801:Humans; D007804:Language Development; D008297:Male; D009949:Orientation; D011594:Psychometrics; D011597:Psychomotor Performance; D012016:Reference Values; D014825:Vocabulary; D014888:Wechsler Scales / Q000706:statistics & numerical data