Figure 2.

Reliability of responses to different movies

Medial and lateral views of “inflated” right hemisphere depicting the inter-SC maps for four different movies. Posterior areas (P) are toward the middle of each panel, while anterior areas (A) are facing the sides. The fMRI measurements for all four movies were acquired with the same equipment and procedures. In addition, to have comparable statistical power, we matched the number of subjects (n=8), and the length of the time courses of all stimuli by extracting seven minutes of fMRI measurements from each of them. Inter-SC was computed by first splitting the eight subjects into two groups, averaging the response time courses separately for each group, and then computing the correlation coefficients between the two resulting response time courses at each cortical location. Colored regions represent locations for which the correlations exceeded a threshold value (0.25, p<0.002; chosen because it was above the highest inter-SC value exhibited by any voxel for two different movies). The Hitchcock episode and the Leone and Chaplin movies evoked far greater and more extensive inter-SC than the real-life, unedited video. The Hitchcock episode evoked more reliable responses in prefrontal cortex than the other three stimuli.