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Demetriou, Andreas; Mouyi, Antigoni; Spanoudis, George – Intelligence, 2008
This study investigated the structure and development of processes involved in "g." One hundred and forty children, about equally drawn among primary school grades 1-6 were examined by four types of Stroop-like speeded tasks addressed to processes of increasing complexity (i.e., speed of processing, perceptual discrimination, perceptual control,…
Descriptors: Children, Elementary School Students, Cognitive Processes, Short Term Memory

Luo, Dasen; Thompson, Lee A.; Detterman, Douglas K. – Intelligence, 2003
Fitted structural equation models to covariances among 9 cognitive abilities Test variables, 11 intelligence test variables, and 3 achievement test scaled scores of 532 primary school children in a twin studies project. Results suggest that individual differences in mental speed are a main causal factor underlying correlation between general…
Descriptors: Academic Achievement, Causal Models, Correlation, Elementary Education