Research output: Contribution to conference - Without ISBN/ISSN › Abstract › peer-review
Research output: Contribution to conference - Without ISBN/ISSN › Abstract › peer-review
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TY - CONF
T1 - Estimating Average Body Size of Sets of Bodies
AU - To, Michelle
AU - Brand, James Liam
AU - Hampton, Georgia
AU - Tovée, Martin
N1 - Conference code: 41st
PY - 2019/7/27
Y1 - 2019/7/27
N2 - 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.
AB - 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.
KW - Body size perception
KW - Ensemble coding
M3 - Abstract
SP - 3371
T2 - 41st Annual Conference of the Cognitive Science Society
Y2 - 24 July 2019 through 27 July 2019
ER -