Fig 4. Effects of varying gaze behavior on cortical reliability when watching the scrambled movie.

(A) For most subjects (except one), the horizontal and vertical variations of the gaze location were more consistent for the intact (non-scrambled) movie than for the scrambled movie. Error bars represent the standard deviation across subjects. (B) For an example subject, when the subject did not fixate at the screen center, there was a lack of reliable responses (C) The scrambled movie induced reliable responses within V1 when they fixated at the screen center. In both (B) and (C), the color indicates the intra-subject cross correlation in voxel time series (*: p < 0.0005, **: p < 0.05, ***: p < 0.03). These results were based on eye-tracking data from nine subjects who freely watched both the intact and scrambled movies.