The “Still Face Experiment” has been around since 1975, when Drs. Ed Tronick, T. Berry Brazelton and two colleagues presented it to the Society for Research in Child Development. (Jason Goldman did a great writeup on Thoughtful Animal about the experiment, the impact it had in understanding child development, and how it’s being used, including to predict child behavior.) Since this YouTube video of the experiment was posted in 2009, it’s been watched more than 760,000 times.
Tronick is director of UMass Boston’s Infant-Parent Mental Health Program, among many other activities, and he does research on how mothers’ depression and other stressful behaviors affect the emotional development and health of infants and children.