Figure 1.

Audiovisual movie presentation task. Audio and video segments of monkey vocalization movies were presented separately and combined. Each testing set contained two different vocalization movies of differing valence. Each cell was tested with eight stimuli: two vocalizations (Auditory only: A1, A2), two silent movies (Visual only: V1, V2), two congruent audiovisual movies (A1V1, A2V2), and two incongruent audiovisual movies created by switching the audio and visual components between the same movies (A1V2 and A2V1).