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Cahan, Sorel; Greenbaum, Charles; Artman, Lavee; Deluya, Nilly; Gappel-Gilon, Yael – Cognitive Development, 2008
Using the ''between-grade levels'' regression discontinuity design, this study examined the hypothesized differential sensitivity of logico-mathematical (LM) and infralogical (IL) operational tasks to the effects of chronological age and first grade schooling in a sample of 580 1st and 2nd grade Israeli children. The results indicate that the…
Descriptors: Age, Grade 2, Grade 1, Foreign Countries
Peer reviewedBauer, Patricia J.; And Others – Cognitive Development, 1995
Tested 13-, 16-, and 20-month olds' and 24- and 28-month olds' categorization of global- and basic-level object sets composed of prototypical and nonprototypical exemplars. Findings offer new information on the effects of prototypicality and on the process of differentiation of early global categories into more specific basic-level ones. (DR)
Descriptors: Classification, Cognitive Development, Comparative Analysis, Developmental Stages

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