BRIEF EXPOSURE OF PICTORIAL DEPTH CUES AFFECTS PERCEIVED SIZES
We investigated whether perceived sizes of stimuli presented on the central vertical meridian of the visual field are modulated as pictorial depth cues are briefly exposed. In one experiment observers indicated which of two bars was bigger as they were presented for 100ms on background without depth cues (control condition); with the horizon line only; with perspective line gradient, and with horizon and perspective line gradient. In the other experiment observers compared the size of two circles presented for 150ms on a background without depth cue, with perspective line gradient and with chessboard in depth. Results of both experiments indicated that pictorial depth cues biased perceived sizes, suggesting that the visual processing of depth cues and its interaction with size perception occur very fast.