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PubMed · 677346

Perceived numerosity, item arrangement, and expectancy.

N Ginsburg
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Abstract

Ten sets of dots ranging in number from 7 to 91 per set were presented to 54 subjects. Half were arranged regularly and half randomly. The regular sets were overestimated by an average of 22%, while the random were underestimated by 16% compared with the physical number. Evidence was presented showing that subjects expect results in the opposite direction. The findings are discussed in relation to the expectancy-contrast model of Birnbaum and Veit.

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N Ginsburg. 1978. Perceived numerosity, item arrangement, and expectancy.. https://pubmed.ncbi.nlm.nih.gov/677346/

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