Slides taken of stands in a sports stadium portraying crowds of from 8 to 1122 people were viewed by 137 observers. The observers tended to underestimate the actual numbers in the crowds; the accuracy of their estimates depended on the stand in which the crowds were situated and whether the observers viewed a training slide. Underestimation of size of a crowd is consistent with previous research on visual numerosity, but exponents of the power-law function relating estimated to actual numbers were in the range 0.95 to 1.13, higher than those found previously.
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References
1.
ClassP.Display density and judgments of number. Perceptual and Motor Skills, 1972, 34, 531–534.
2.
IndowT.IdaM.Scaling of dot numerosity. Perception and Psychophysics, 1977, 22, 265–276.
3.
KaufmanE. L.LordM. W.ReeseT. W.VolkmanJ.The discrimination of visual number. American Journal of Psychology, 1949, 62, 498–525.
4.
KruegerL. E.Perceived numerosity. Perception and Psychophysics, 1972, 11, 5–9.
5.
KruegerL. E.Single judgements of numerosity. Perception and Psychophysics, 1982, 31, 175–182.
6.
MannL.TaylorK. F.Queue counting: The effect of motives upon estimates of numbers in waiting lines. Journal of Personality and Social Psychology, 1969, 12, 95–103.
7.
MillerA. L.BakerR. A.The effects of shape, size, heterogeneity, and instructional set on the judgement of visual number. American Journal of Psychology, 1968, 81, 83–91.
8.
StevensS. S.Psychophysics, introduction to its perceptual, neural, and social prospects. New York: Wiley, 1975.
9.
StevensS. S.GuiraoM.Subjective scaling of length and area and the matching of length to loudness and brightness. Journal of Experimental Psychology, 1963, 66, 177–186.
10.
TavesE. M.Two mechanisms for the perception of visual numerousness. Archives of Psychology, New York, 1941, No. 265.
