Fig. 4.

Predicting the perceived angle subtense from the probability distributions of angle sources in the database. (A) The gray curve is the cumulative probability distribution of the physical sources of angles derived from the probability distribution pooled from the six distributions shown in Fig. 3. The black line indicates the cumulative probability distribution derived from a hypothetical distribution in which the probability of the sources of all possible angle projections is the same (see Inset). (B) The predicted perceptions of angle subtenses are shown by the gray curve; the dashed black line indicates percepts corresponding to the actual subtenses of the retinal stimuli. (C) The magnitude of angle misperception predicted by this analysis (gray curve) compared with psychophysical measurements of angle misperception (bars; data are from ref. 7).