Despite the social-communication benefits demonstrated through the Social ABCs, the research team is also motivated to foster the attentional abilities of toddlers with emerging ASD in response to compelling evidence that early attentional control abilities may play a central role in the emergence of ASD. Based on this knowledge, the current study targets not only social-communication challenges and affect sharing (as per the existing Social ABCs intervention), but also attentional control in toddlers with suspected or confirmed ASD. Using a structured, computerized attention-training protocol, this RCT evaluates the impact of supplementing the standard Social ABCs intervention with pre-intervention attentional control training.