Figure 3.

(A) Examples of unfiltered pictures that were cut in half, with the upper and lower components then recombined to produce hybrids consisting of components drawn from the same original and hybrids consisting of components drawn from different originals. (B) Threshold contrast range for discriminating synchronized from unsynchronized contrast modulations for unfiltered pictures in which the upper and lower portions were drawn either from the same original (Same) or different originals (Different). The abscissa plots the size of the blank gap separating upper and lower portions of the hybrid picture; data are averaged over four observers and the difference between same and different conditions is statistically significant (z-score two-tailed test, P < 0.001).