Table 1.

Characteristics of participants at baseline (T1)

Variables	Treatment Group (n = 12)	Waitlist Control Group (n = 17)
	M (SD)	M (SD)	p
Age (years)	14.6 (1.0)	14.3 (1.2)	ns
Gender (% male)	66.7	58.8	ns
ASD diagnosis (%)			ns
Asperger Syndome	75.0	94.1
Childhood autism	25.0	5.9
Comorbid psychiatric disorders (%)	33.3	35.3	ns
On medication (%)	41.7	23.5	ns
Parental age (years)	46.8 (5.7)	47.3 (4.4)	ns
Parental education (% tertiary)	100.0	70.6	ns
Baseline Measures
ADOS-2 Comparison Score	6.67 (2.00)	5.93 (1.53)	ns
Stanford-Binet 5 Matrices	10.22 (1.56)	11.58 (2.31)	ns
Stanford-Binet 5 Vocabulary	11.00 (2.06)	12.58 (3.37)	ns
Stanford-Binet 5 Total IQ	104.67 (7.31)	113.50 (14.46)	ns
ABAS-3 Communication	52.90 (8.19)	56.82 (6.13)	ns
ABAS-3 Social	46.70 (8.82)	51.35 (9.01)	ns
ABAS-3 Self-direction	51.90 (12.64)	49.47 (10.00)	ns
Adolescent Report Outcome Measures
TASSK-R	16.33 (1.88)	15.82 (2.22)	ns
QSQA-R Total get-togethers	1.27 (1.95)	2.31 (2.75)	ns
QSQA-R Conflict	4.10 (2.56)	5.50 (5.11)	ns
Parent Report Outcome Measures
QSQP-R Total get-togethers	1.33 (1.87)	2.17 (2.53)	ns
QSQP-R Conflict	12.11 (6.70)	9.69 (3.77)	ns
SRS-2 Total	115.50 (28.77)	95.24 (21.82)	0.040
SRS-2 SCI	95.25 (23.25)	77.41 (17.53)	0.026
SRS-2 RRB	20.25 (6.27)	17.82 (5.63)	ns
ASRS Total	114.17 (29.00)	102.18 (25.07)	ns
ASRS Social/Communication	41.08 (8.30)	35.47 (10.64)	ns
ASRS Unusual Behaviors	39.08 (15.29)	33.65 (11.37)	ns
ASRS Peer Socialization	23.33 (5.03)	19.82 (4.69)	ns

Note. ns = statistically non-significant. TASSK-R = Test of Adolescent Social Skills Knowledge (Revised); QSQA/P-R = Quality of Socialization Questionnaire (Revised); SRS-2 = Social Responsiveness Scale-2; ASRS = Autism Spectrum Rating Scale