Gina Mireault, Ph.D., is a Developmental Psychologist and Professor in the Behavioral Sciences Department at Johnson State College. She studies the perception and creation of humor in infants from 3 months to 12 months of age, addressing the question: How do babies figure out what is funny?   She is interested in the serious implications of humor research for understanding critical developmental milestones, such as whether or not infants are capable of a “theory of mind”, whether or not humor can contribute to attachment security with parents, and whether or not infants rely on parental emotion to interpret and regulate their own emotional response to ambiguous events. She is intrigued by young infants’ detection of absurdity and what it may indicate about their early knowledge of social behavior. Vasudevi Reddy, Ph.D., is Professor of Developmental and Cultural Psychology at the University of Portsmouth in the United Kingdom. She is interested in the origins and development of social cognition, mainly in young infants. She has been exploring the role of emotional engagement in social understanding, focusing on such everyday, ordinary engagements as teasing and joking and showing-off or feeling shy, which often tend to be ignored in mainstream theories. She is Director of the Centre for Situated Action and Communication, which explores ideas of context and situation on different kinds of psychological phenomena. Her interest in engagement as the route to understanding has led her to questions about the nature and influence of cultural engagements on social understanding.