- Lab Visit: Within 1 week of the home visit, the mother and child will come to the NICHD clinic for about 2 hours. During this time, the mother will return the previous surveys and fill out another one regarding her current mood. She will then interact with her child, who will be seated in front of her. The 20-minute session will be videotaped. (There will be breaks during the session.) The mother will be instructed about how she should act (happy or sad). She and her baby will then participate in a variety of filmed situations that will induce certain emotions in the baby, such as happiness, fear, activity, frustration, and interest, in order to learn how different children react to different situations.