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Numerosity estimation as a function of stimulus organization.
Authors:N Ginsburg
Affiliation:Lakehead University, Thunder Bay, Ontario, Canada.
Abstract:It was proposed that stimulus organization of a set of homogeneous items can best be measured by using the mean distance to nearest neighbours. Patterns of dots were generated that fell on four different positions along the cluster continuum, from highly regular, through random, to clustered. When thirty subjects were asked to judge numerosity, their estimates decreased significantly as cluster measures increased. Four possible interpretations of the effect of organization on numerosity perception are discussed.
Keywords:
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