Kathy Hirsh Pasek, Ph.D., is a professor in the psychology department at Temple University, where she directs the Infant Language Laboratory and participated in one of the nation's largest studies of the effects of childcare. She also composes and performs children's music. She currently lives in Ardmore, PA.

Roberta Michnick Golinkoff, Ph.D., directs the Infant Language Project at the University of Delaware, where she holds a joint appointment with the departments of linguistics and psychology. Together, she and Dr. Hirsch-Pasek were featured on the PBS Human Language series and are the authors of How Babies Talk. She currently resides in Wilmington, Delaware

Diane Eyer, Ph.D., is a member of the psychology department at Temple University and is the author of Motherguilt and Mother-Infant Bonding. She resides in Bucks County, PA. Less