Inclusion Criteria for Children:  Child between 18 and 42 months of age Child and primary caregiver live within a 3-hour driving radius of one of the sites (i.e., VUMC or UC Davis)  Inclusion Criteria for Caregivers:  Age 18 years or older Parent or legal guardian of participating child Has access to technology (e.g., phone, laptop, or tablet with internet connection and audio-visual capabilities) to connect to the tele-assessment platform Sufficient facility with English to participate in the procedures and complete study measures.  Exclusion Criteria for Children:  Severe sensorimotor impairment that cannot be corrected and would interfere with completion of study activities Medical conditions for which tele-evaluation of ASD symptoms is likely to be inappropriate or complex (i.e., rare genetic syndromes, severe epilepsy, fragile health).