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Direct linkCantrell, Lisa; Boyer, Ty W.; Cordes, Sara; Smith, Linda B. – Developmental Science, 2015
Infants have shown variable success in quantity comparison tasks, with infants of a given age sometimes successfully discriminating numerical differences at a 2:3 ratio but requiring 1:2 and even 1:4 ratios of change at other times. The current explanations for these variable results include the two-systems proposal--a theoretical framework that…
Descriptors: Infants, Child Development, Discrimination Learning, Task Analysis
Download full textSmith, Linda B.; Kemler, Deborah G. – 1977
This study investigated the effects of two stimulus manipulations (spatial distinctness and number of dimensions) on the performance of 24 kindergartners and 24 fifth graders in (1) tasks requiring distributed attention and (2) tasks requiring selective attention. Results suggest that kindergartners attempt to use one processing mode (distributed…
Descriptors: Age Differences, Attention, Classification, Cognitive Style
