Fig. 8.

Analysis across subjects of variation of Kanizsa-type stimulus size and displaced-grating stimulus spatial frequency. A,B, Bar graphs show the average fMRI signal change, for individual visual areas, across subjects (A, n = 9;B, n = 5). Corresponding visual areas in the left and right hemispheres areas are averaged together. Error bars indicate SEM. A, Displaced grating versus nondisplaced grating for three spatial frequencies. ANOVA indicates a significant effect of spatial frequency. B, Aligned versus rotated inducers for four Kanizsa square sizes. ANOVA does not show a significant effect of size.