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Direct linkBalboni, Giulia; Naglieri, Jack A.; Cubelli, Roberto – Journal of Psychoeducational Assessment, 2010
The concurrent and predictive validities of the Naglieri Nonverbal Ability Test (NNAT) and Raven's Colored Progressive Matrices (CPM) were investigated in a large group of Italian third-and fifth-grade students with different sociocultural levels evaluated at the beginning and end of the school year. CPM and NNAT scores were related to math and…
Descriptors: Reading Comprehension, Academic Achievement, Predictive Validity, Nonverbal Tests
Rojahn, Johannes; Naglieri, Jack A. – Intelligence, 2006
Lynn [Lynn, R., 2002. Sex differences on the progressive matrices among 15-16 year olds: some data from South Africa. "Personality and Individual Differences 33," 669-673.] proposed that biologically based developmental sex differences produce different IQ trajectories across childhood and adolescence. To test this theory we analyzed the…
Descriptors: Gender Differences, Nonverbal Ability, Intelligence Quotient, Children
