Abstract
Sensitization is a general arousal process that increases an organism's reactivity to environmental stimuli. Sensitization has been shown to influence young infants' responsiveness to visual patterns, and prior research has pointed to the amount of contrast energy in a pattern as an important factor in generating sensitization. In this experiment, the black-and-white contrast of an achromatic checkerboard pattern was manipulated, and the effects on 4-month-olds fixations were assessed during repeated presentations. High-contrast patterns were found to elicit relatively more fixation overall than low-contrast patterns. Furthermore, the pattern with the highest contrast elicited response increments between Trials 1 and 2. These findings are consistent with the hypothesized relation between pattern-contrast energy and sensitization.
Published Version
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