Multivariate Visual Evoked Response Correlates of Intelligence

ABSTRACT It was hypothesized that determination of The type and degree of the relationship between the multidimensional visual evoked response (VER) and intelligence would be enhanced using multiple VER measures. It was further assumed that any relationship found would have more empirical and conceptual utility, the more homogeneous the subject sample with respect to intellectual ability. A battery of abilities tests was administered to 98 5‐yr‐old children (50 girls, 48 boys: mean age. 67.16 mos; mean IQ, 119.5, SD), 9.6. VERs were recorded from three different scalp locations (left and right hemispheres and occipital midline) to three stimulus conditions (2/sec flashes. 2/sec pattern. 6/sec flashes). Seven specific factors derived from measures of the VERs (e.g. amplitude, latency. complexity, linearity) were then used as predictor variables to abilities variables in multivariate analyses. Significant multiple correlations were found between the VER variables and WPPPSI total IQ and WPPSI performance scaled score. Correlation to the WPPSI verbal scaled score was not significant. The relationship between VER and performance was further explored with canonical correlations, which were significant (R,=.50, p