Abstract
This study was conducted in order to investigate the effects of distortion, fill and noise effects on pattern discrimination. Patterns were generated from a 10 × 10 matrix on a random basis and were comprised of black filled squares. There were four levels of pattern fill or complexity. Distortion was the random displacement of basic pattern elements while noise was the filling in of additionally selected (on a random basis) pattern elements. One hundred and forty-four male and female undergraduates served as the subjects. Patterns were projected automatically with a stimulus presentation time of 3.0-sec. and a constant intertrial interval of 5.0-sec. The method of constant stimuli was employed. The results indicated that the discrimination of patterns, as generated in this study, were significantly effected by fill, noise, and distortion at the 0.01 level. Interaction effects were significant also at the same level. Response times were also significantly affected as a function of fill and noise.
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