Abstract
Six- and 12-month-old infants were tested for their perception of a variety of features of multiple-group auditory patterns. Each pattern comprised nine pure tones organized as three groupings each of three elements. The features examined included: (1) features having to do with frequency composition, designated as “local” pattern features; and (2) features involving relations between pattern components, designated as “global” pattern features. Infants were tested with a Go/No-Go conditioned head-turn procedure. Twelve-month-olds readily performed all discriminations. By contrast, 6-month-olds had greater difficulty discriminating local than global pattern features and showed limitations in their ability to organize three distinct groupings of elements into a unified pattern. Results are discussed with reference to infants' perception of features of single-group patterns and the notion of developmental changes in auditory information-processing capacities.
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