The present study aimed to investigate how the prior social disposition of a model in a warm-up period influences 18-month-old infants’ subsequent imitation. Infants were randomly assigned to an interactive and social warm-up period (<i>n</i> = 19) or a non-interactive and non-social warm-up period (<i>n</i> = 19) with the model prior to the imitation task. They then participated in an imitation ...