Perceptual judgment as a function of mental set, anchoring point, and method of judgment.

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Abstract
Two heretofore separate lines of investigation into the dimensions of perceptual judgment were integrated by examining the interacting influences of a visual anchoring point and a conflicting mental set upon the formation of a scale of perceptual judgment. The influence of the suggestion-induced set, with or without the presence of the anchoring point, was significant beyond the .1% level of confidence. A gradual increase in the influence of the anchoring point throughout the series of judgments could be accepted at the 5% level of confidence. It was concluded that: (a) the influence of a mental set may be a strong determining factor in the perception and subsequent judgment of an unstructured situation; and (b) the presence of an anchoring point may be of help in stabilizing the perceptions and judgments, but its influence should not be taken for granted.
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