Distributions of facial configurations shown to participants. Upset morphs were from 0% to 100% upset in 5% increments. During the training phase, participants saw the same range of stimuli as for the unshifted actor. During the testing phase, participants were presented with morph distributions for the calm shifted, unshifted, or upset shifted actors. NimStim Actors 1, 3 and 40 are displayed as they gave permissions for their images to be published; however, actors 24, 25, and 42 were used during the task.