1 Department of Neuroscience, SP30-2400, 10550 North Torrey Pines Road, The Scripps Research Institute, La Jolla, CA 92037, USA. Electronic address: mtaffe@scripps.edu.
2 Department of Psychology, Arizona State University, 950 S. McAllister Ave, Tempe, AZ 85287, USA. Electronic address: foster.olive@asu.edu.