Estimating Average Body Size of Sets of Bodies

To, Michelle and Brand, James Liam and Hampton, Georgia and Tovée, Martin (2019) Estimating Average Body Size of Sets of Bodies. In: 41st Annual Conference of the Cognitive Science Society, 2019-07-242019-07-27, Palais des Congrès de Montréal.

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Abstract

In two behavioral experiments, we demonstrated that human observers can extract average body size from a group of individuals. In Experiment 1, we asked 38 participants to estimate the average body size from a group of 5, 10 or 15 bodies that were presented in various angles of view (Profile, Three-Quarter, Frontal, and Mixed). Participants were able to extract the average body size, but they systematically overestimated thinner body groups, and underestimated larger body groups. Biases were generally reduced for smaller sets sizes and when bodies were shown in profile view, but the trend was reversed for sets with larger bodies. In Experiment 2, we tested 37 participants and showed that the accuracy of their estimates was modulated by presentation time: Accuracy was poorest when groups were presented for 1s, but significantly improved for 3s and 5s presentations. Implications of these finding are discussed.

Item Type:
Contribution to Conference (Other)
Journal or Publication Title:
41st Annual Conference of the Cognitive Science Society
Subjects:
ID Code:
134958
Deposited By:
Deposited On:
13 Nov 2019 12:00
Refereed?:
Yes
Published?:
Published
Last Modified:
18 Jul 2020 01:51