The coaching service delivery model is often implemented within parent-mediated interventions for infants at an elevated likelihood of autism spectrum disorder. However, less is known about the exact coaching behaviors used within intervention sessions. Therefore, we examined the coaching behaviors implemented within the Adapted Responsive Teaching intervention. We also investigated the associations between coaching behaviors and parent education levels and the associations between the coaching behaviors and a parent outcome, that is, parent responsiveness. Results indicated that the interventionists demonstrated joint interaction and child-focused behaviors the most frequently. The interventionists much less frequently demonstrated guided practice, caregiver practice, and problem-solving behaviors. The use of joint interaction behaviors was positively associated with parent education levels, whereas the use of child-focused behaviors was negatively associated with parent education level. More information sharing by the interventionists predicted a greater change in parent responsiveness, whereas more child-focused behaviors predicted less change in parent responsiveness.