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Schleifer, Patrick; Landerl, Karin – Developmental Science, 2011
Enumeration performance in standard dot counting paradigms was investigated for different age groups with typical and atypically poor development of arithmetic skills. Experiment 1 showed a high correspondence between response times and saccadic frequencies for four age groups with typical development. Age differences were more marked for the…
Descriptors: Control Groups, Age Differences, Arithmetic, Cognitive Development
Farran, Emily K.; Blades, Mark; Boucher, Jill; Tranter, Lesley J. – Developmental Science, 2010
Individuals with Williams syndrome (WS) show a specific deficit in visuo-spatial abilities. This finding, however, derives mainly from performance on small-scale laboratory-based tasks. This study investigated large-scale route learning in individuals with WS and two matched control groups (moderate learning difficulty group [MLD], typically…
Descriptors: Control Groups, Mental Retardation, Perspective Taking, Measures (Individuals)