Body size as a metric for the affordable world.

In contrast, in the elephant condition, the affordance boundary shifted to the right, as demonstrated by a decrease in affordance similarity between size rank 6 and 7, and that between size rank 7 and 8 as compared to that between size rank 5 and 6, with a trend towards significance (with size rank 6–7: Z=1.28, p=0.099; with size rank 7–8: Z=1.48, p=0.069).

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