This review of the literature is presented to familiarize the reader with the available measures as they relate to assessing the basic capacity for social interaction in infants and preschool children. A review of the literature revealed that broad concepts of social interaction that overlap with other aspects of social development have been included in the assessment of social interaction. Only those measures that included assessment of the basic capacity for social interaction, either as the main goal or as part of assessing different aspects of social development, were considered. The identified measures are grouped in this review by the main area of social development for which they were established. Brief descriptions of the measures are provided in a table format.