One hundred and eighteen subjects participated in an 18-trial four-choice probability learning task to determine if probability learning data could be described by a family of learning curves and to identify ability and personality correlates of these curves. (Author)

Testing homogeneity of correlations with Fisher's Z is inappropriate when correlations are themselves correlated. Suppose measurements of brain activation and performance are taken before and during a verbal memory task. Of interest are changes in activity gradients in specific regions, R1, R2, R3, and performance, V. The "correlated correlations"…

Investigates extent to which perceptual factors of speed and flexibility of closure represent more general processes also operating in cognitive and personality domains by including in a single factor analysis perceptual tests and new tests requiring cognitive abilities resembling closure abilities operating in the perceptual domain. (RC)

Results support Sherman's hypothesis that sex differences in tests of field independence, such as Witkin's Rod-and-Frame Test and Embedded Figures Tests, are artifacts of the well-known sex differences in space perception and are therefore not evidence that females are less analytical than males. (Author/BJG)

Twenty-six test variables for psychological differentiation and cognitive abilities were factor analyzed with a view towards replication of certain factors of perceptual and conceptual differentiation and related these factors to cognitive abilities. (Author)