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Peer reviewedLuo, 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
