Table 1.
Sample Characteristics
| Control Group | ASD Group | Group Comparisons | |||||
| (n = 45; 23/22 M/F) | (n = 51; 42/9 M/F) | ||||||
| M (SD) | M (SD) | t | df | p | |||
| Age (years) | 18.9 (5.8) | 17.8 (8.5) | 0.76 | 94 | 0.45 | ||
| Full IQ | 117.62 (12.37) | 105.86 (12.77) | 4.57 | 94 | < 0.001 | ||
| Performance IQ | 113.76 (14.5) | 104.90 (14.5) | 2.97 | 94 | 0.004 | ||
| Verbal IQ | 118.82 (11.7) | 105.82 (14.18) | 4.86 | 94 | < 0.001 | ||
| Narrative ability (LSA) | 0.50 (0.09) | 0.40 (0.11) | 3.96 | 60 | < 0.001 | ||
| ADOSb | |||||||
| Social Affect Severity Score | – | 6.4 (2.1) | – | ||||
| RRB Severity Score | – | 7.0 (2.5) | – | ||||
| Total Severity Score | – | 6.7 (2.3) | – | ||||
| ADI-R | |||||||
| IS factor sum | – | 0.93 (0.63) | – | ||||
| RSM factor sum | – | 0.54 (0.44) | – | ||||
| Parent-control Group | Parent-ASD Group | Group Comparisons between Parent-control and Parent-ASD Groups Overall | |||||
| (n = 58; 22/36 M/F) | (n = 133; 50/83 M/F) (n = 62 BAP+; n = 66 BAP-) |
||||||
| M (SD) | M (SD) | t | df | p | |||
| Overall | BAP(+) | BAP(−) | |||||
| Age (years) | 41.2 (10.4) | 46.2 (8) | 47.0 (7) | 45.3 (8.5) | −3.26 | 88a | 0.002 |
| Full IQ | 114.4 (11.7) | 111.9 (11.32) | 112.5 (11.3) | 111.4 (11.2) | 1.38 | 189 | 0.17 |
| Performance IQ | 114.6 (13.1) | 110.6 (11.54) | 110.9 (11.2) | 110.6 (11.7) | 2.12 | 189 | 0.04 |
| Verbal IQ | 110.7 (12.9) | 110.5 (11.61) | 111.3 (12.5) | 109.6 (10.8) | 0.07 | 189 | 0.95 |
| Narrative ability (LSA) | 0.50 (0.09) | 0.46 (0.11) | 0.46 (0.12) | 0.46 (0.10) | 2.62 | 132a | 0.01 |
IS Insistence on Sameness, IQ Intelligence Quotient, LSA Latent Semantic Analysis, RRB Restricted and Repetitive Behavior, RSM repetitive sensorimotor.
aEqual variance not assumed in statistical t-test
bComparison severity score labels are as follows: 0–2 = “minimal-to-no evidence”, 3–4 = “low”, 5–7 = “moderate”, 8–10 = “high”