Table 1.

Participant characteristics.

	M	SD	Range
Age Adaptive functioning  ABC composite  Communication  Daily living  Social skills ASD severity  SRS-2 total  Social awareness  Social cognition  Social communication  Social motivation  RRB index  SCI index Problem behavior  Internalizing  Externalizing  Total CBCL problems Sleep disturbance  Bedtime resistance  Sleep onset delay  Sleep duration  Sleep anxiety  Night wakings  Parasomnias  Sleep-disordered breathing  Daytime sleepiness  Total CSHQ	8.23 72.98 75.85 74.75 72.35 76.93 73.40 73.53 75.18 68.75 77.70 75.55 63.93 61.78 66.75 57.65 62.58 59.53 60.88 62.75 67.60 53.98 56.90 48.18	2.12 8.85 12.02 11.95 10.17 9.30 10.41 10.77 10.51 10.71 8.68 9.56 9.89 11.43 9.38 15.41 16.88 19.33 16.38 18.97 19.38 17.99 10.08 9.68	5.02–12.87 54–89 46–105 52–95 49–91 56–90 48–90 53–90 51–90 48–90 53–90 54–90 41–82 33–83 46–83 44–97 45–83 46–110 44–99 44–100 41–113 46–141 44–91 36–72

All of the above, with the exception of age and total CSHQ, have been calculated based on T-scores. Total CSHQ is based on raw data with a clinical cutoff point of 41 (see Measures section for further information).