Numerosity Estimation as a Function of Stimulus Organization

1 October 1991

journal article
research article
Published by SAGE Publications in Perception

Vol. 20 (5) , 681-686
https://doi.org/10.1068/p200681

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 signicantly as cluster measures increased. Four possible interpretations of the effect of organization on numerosity perception are discussed.

Keywords

This publication has 9 references indexed in Scilit:

Response Bias and the Generation of Random Sequences
Perceptual and Motor Skills, 1991
Interactions between area and numerosity
Psychological Research, 1988
Perceived Numerosity as a Function of Item Size
Perceptual and Motor Skills, 1988
Measurement of Visual Cluster
The American Journal of Psychology, 1987
Subjective Correlation and the Regular-Random Numerosity Illusion
The Journal of General Psychology, 1983
Effect of Item Arrangement on Perceived Numerosity: Randomness vs Regularity
Perceptual and Motor Skills, 1976
Judgmental illusion produced by contrast with expectancy
Perception & Psychophysics, 1973
The solitaire illusion: An illusion of numerosity
Perception & Psychophysics, 1972