Abstract
Abstract The relationship of age and IQ to response inhibition in children was investigated in two experiments. Two tasks were employed: a “walk slowly” task designed to measure motor inhibition and a simple matching task designed to measure cognitive inhibition. In Experiment I, the Ss were 20 “normal” children at ages 4, 5, 6, and 7 years of age. Response inhibition was found to increase with age. In Experiment II, the Ss were 48 institutionalized retardates, half between the ages of 8 to 12 and half between the ages of 13 to 17. Half of each age group had IQs between 40 and 55, and half had IQs between 56 and 70. Motor response inhibition varied as a function of age but not IQ, while cognitive inhibition varied as a function of IQ but not age.
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