Halle R Dimsdale-Zucker1, Jonathan Nicholas2. 1. Center for Neuroscience and Department of Psychology, University of California, Davis, California 95618 and hrzucker@ucdavis.edu jonathan.nicholas@columbia.edu. 2. Department of Psychology, Columbia University, New York, New York 10027 hrzucker@ucdavis.edu jonathan.nicholas@columbia.edu.