Robert Siegler is the Teresa Heinz Professor of Cognitive Psychology at Carnegie Mellon University. He is author of the cognitive development textbook Children's Thinking and has written or edited several additional books on child development.

Elizabeth Gershoff is Associate Professor of Human Development and Family Sciences at the University of Texas at Austin.

Jenny R. Saffran is the College of Letters & Science Distinguished Professor of Psychology at the University of Wisconsin-Madison, and an investigator at the Waisman Center. Her research is focused on learning in infancy and early childhood, with a particular focus on language.

Nancy Eisenberg is Regents' Professor of Psychology at Arizona State University. Her research interests include social, emotional, and moral development, as well as socialization influences, especially in the areas of self-regulation and adjustment.

Judy DeLoache is the William R. Kenan Jr. Professor of Psychology at the University of Virginia. She has published extensively on aspects of cognitive development in infants and young children.

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