Experimental paradigm for the interaction of attention and affect (adapted from Etkin, et. al. 2004).

<p>Stimuli were either fearful (F) or neutral (N) expression faces, pseudocolored in red, yellow,or blue. Each event was comprised of a face which was either masked (33 ms for a fearful or neutral face, followed by 167 ms of a neutral face mask of the same gender and color, but different individual; MF or MN, respectively), or unmasked (200 ms for each face; F or N) or masked. Ten events of the same type, spaced 2 seconds apart, were presented within each 20 second block, followed by 15 seconds of crosshair with black background. There were four blocks per condition, giving 40 time points in the correlation estimates per condition per subject. In view of our specific hypotheses, only the unmasked conditions are discussed in the main text, while results for unmasked conditions are presented elsewhere (manuscript in preparation).