Abstract
Eysenck (1979) hypothesized that scores on Raven's Progressive Matrices show an increasing correlation with performance on tasks of increasing complexity. To test this hypothesis the reaction times (RTs) of 44 subjects were obtained for four tasks representing four levels of task complexity. Correlations of RTs for the four levels revealed a “simplex” structure indicative of increasing task complexity. Correlations of IQ scores and RT for the increasing levels of complexity were found to be statistically significant but showed no increasing correlational trend. Distinguishing between the level of task complexity and the level of within-task-difficulty could account for the lack of support for the hypothesis.
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