Final answer:
Social Interaction Theory is the treatment approach that follows the child's lead and uses behavioral strategies to facilitate communication, contrasting with the more adult-led ABA approach.
Step-by-step explanation:
The treatment approach that is less adult dominated and in which the adult follows the child's lead, facilitating communication through behavioral strategies such as modeling, shaping, and reinforcement, is Social Interaction Theory. This approach is centered around the social development of the individual and is particularly useful in interventions for children with autism. It contrasts with other methodologies like Applied Behavior Analysis (ABA), which can be more structured and adult-led. Social Interaction Theory allows for a more naturalistic and child-centered environment where the facilitator supports the child's interests and initiates interactions that are responsive to the child's actions and communications.