title: Mixed handedness and achievement test scores of middle school boys.
abstract: The purpose of the study was to replicate findings of an earlier study of fourth grade boys manifesting mixed handedness with a sample. Among 32 mixed-handed boys in Grades 6 to 8, the right-handed writer, left-handed thrower group obtained low spelling scores (Normal Curve Equivalent Scores) on the California Achievement Test significantly more frequently than the left-handed writer, right-handed thrower group. These findings are consistent with data for Grade 4 boys in the earlier study. Findings strengthen the hypotheses that mixed handedness is not a unitary neuropsychological entity and that boys who write with the right hand and throw with the left hand might be at risk for certain academic deficits.
authors.affiliation: Department of Psychiatry and Behavioral Sciences, Rosalind Franklin University of Medicine and Science, 3333 Green Bay Road, North Chicago, IL 60064, USA.
authors.forename: P S B
authors.initials: PS
authors.lastname: Sarma
mesh_terms: D000293:Adolescent; D002648:Child; D004522:Educational Status; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests / Q000706:statistics & numerical data; D011594:Psychometrics; D011932:Reading; D012737:Sex Factors; D013334:Students / Q000523:psychology / Q000706:statistics & numerical data; D014956:Writing