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Table 1 Sample Characteristics

From: Links between looking and speaking in autism and first-degree relatives: insights into the expression of genetic liability to autism

  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
  1. IS Insistence on Sameness, IQ Intelligence Quotient, LSA Latent Semantic Analysis, RRB Restricted and Repetitive Behavior, RSM repetitive sensorimotor.
  2. aEqual variance not assumed in statistical t-test
  3. bComparison severity score labels are as follows: 0–2 = “minimal-to-no evidence”, 3–4 = “low”, 5–7 = “moderate”, 8–10 = “high”