The purpose of this study was to evaluate the use of a robot (Troy) in a low-dose treatment protocol for two children with Autism Spectrum disorder. The efficacy of intervention was measured by comparing social engagement in two contexts: interactions with two adults and interaction with an unfamiliar adult. During the treatment, a robot was included in pseudo-triadic interactions with the clinician and the child. The robot was programmed to perform simple actions that imitated the actions of the clinician in an effort to engage the child. These pseudo-triadic interactions were incorporated into intervention over the course of a 16-session intervention program. Each child's social engagement was assessed pre-intervention as well as post-intervention in the context of symbolic play in a triad and interaction with an unfamiliar adult. These pre-and post-intervention levels of social engagement were compared in order to detect significant gains after the intervention program with the robot. An increase in both participants' engaged behaviors during post-assessment measures was observed. One participant demonstrated significantly more engaged behaviors than the other.

The current study was part of a larger work investigating the effects of intervention incorporating a robot on the social engagement behaviors of children with autism. The larger study implemented a single-subject, multiple-baseline research design in which four children with autism participated in baseline sessions, traditional intervention, intervention including a robot, and follow-up sessions. The current study focused on the participant's responses to directives from the clinician and the parent during collaborative activities that included the robot. Children's responses were analyzed to determine if they responded to directives without assistance, responded with hand-over-hand assistance, or did not comply. Sessions were complex and required the development of a detailed analysis system to ensure fidelity. Overall results were highly variable but showed gains in one child. Clinical observation suggested that all four children benefited from their exposure to the robot, particularly with regards to regulation. Although variable, the results of this study suggest potential for the promotion and generalization of a child's ability to respond to social engagement bids with other humans. Additional research should be conducted to establish the effectiveness of a robot in intervention in generalizing social engagement behaviors in children with autism.