Abstract
The contribution of perceptual processes to the correlation between measures of sustained attention and intelligence was investigated in considering computerized and paper–pencil tests of sustained attention. Perceptual processes were represented by tasks demanding signal detection and stimulus discrimination. A total of 117 participants completed two attention tests, as well as two tests that required signal detection and stimulus discrimination. Intelligence was measured by means of Advanced Progressive Matrices (APM) and Berliner Intelligenzstruktur-Test (BIS). Structural equation modeling showed that intelligence was best predicted by one independent latent variable, which included loadings of sustained attention, speed of signal detection, and of stimulus discrimination. The investigation of the structure of prediction revealed speed of stimulus discrimination and genuine sustained attention as major predictors of intelligence.
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