title: Individual differences in trajectories of arithmetical development in typically achieving 5- to 7-year-olds.
abstract: The arithmetical performance of typically achieving 5- to 7-year-olds (N=29) was measured at four 6-month intervals. The same seven tasks were used at each time point: exact calculation, story problems, approximate arithmetic, place value, calculation principles, forced retrieval, and written problems. Although group analysis showed mostly linear growth over the 18-month period, analysis of individual differences revealed a much more complex picture. Some children exhibited marked variation in performance across the seven tasks, including evidence of difficulty in some cases. Individual growth patterns also showed differences in developmental trajectories between children on each task and within children across tasks. The findings support the idea of the componential nature of arithmetical ability and underscore the need for further longitudinal research on typically achieving children and of careful consideration of individual differences.
authors.affiliation: School of Psychology, Queen's University Belfast, Belfast, UK.
authors.forename: Julie-Ann
authors.initials: JA
authors.lastname: Jordan
authors.forename: Gerry
authors.initials: G
authors.lastname: Mulhern
authors.forename: Judith
authors.initials: J
authors.lastname: Wylie
mesh_terms: D002648:Child; D002657:Child Development; D002675:Child, Preschool; D003071:Cognition; D005260:Female; D006801:Humans; D007206:Individuality; D008137:Longitudinal Studies; D008297:Male; D008433:Mathematics; D009483:Neuropsychological Tests; D011340:Problem Solving; D013647:Task Performance and Analysis; D014706:Verbal Learning; D014956:Writing