Inclusion Criteria:  Chronological age between 12-18 years A confirmed diagnosis of ASD, as based on a score above ASD cutoff on the Autism Diagnostic Observation Schedule-Second Edition and DSM-5 clinical evaluation Cognitive and adaptive behavior abilities in the ID range as determined by a Brief IQ standard score between 40 - 70 on the Stanford Binet-Fifth Edition (SB-5) and a Total Adaptive Composite below 70 on the Adaptive Behavior Assessment System, 3rd Edition (ABAS-3) Clinically significant symptoms of anxiety, defined by clinically significant anxiety elevations on the ADAMS and meeting diagnostic criteria for at least one anxiety diagnosis on the Anxiety Disorders Interview Schedule: Autism Addendum (ADIS:ASA)  Exclusion Criteria:  A primary mental health diagnosis of a non-anxiety psychiatric condition such as a thought disorder, as determined following administration of the ADIS:ASA, thus suggesting that a different treatment approach is merited A raw score above 18 on the Irritability sub-scale of the Aberrant Behavior Checklist-Community (ABC-C), indicating problem behavior is 1.5-2 SD above the mean for youth with ID within this age range, thus suggesting a group treatment may not be appropriate Inability of families to attend at least 11 of 14 sessions