Table 3.
Left: Monozygotic (MZ), dizygotic (DZ) and twin-sibling correlations in S2. Right: The contribution of additive genetic (A), dominant genetic (D), and common (C) and unique environmental (E) variance to the total variance of the AQ-Short scales and the YASR AP scale, based on univariate models
| MZ | DZ | Twin–sibling | A | D | C | E | A | E | |
|---|---|---|---|---|---|---|---|---|---|
| AQ-Short Total | 0.60 (0.44–0.72) | 0.15 (–0.07 to 0.35) | 0.20 (0.05–0.34) | 21 (0–61) | 33 (0–64) | 47 (36–61) | 51 (37–63) | 49 (37–64) | |
| AQ-Short Social | 0.34 (0.14–0.52) | 0.16 (–0.05 to 0.36) | 0.10 (–0.06 to 0.26) | 4 (0–43) | 31 (0–51) | 66 (49–87) | 28 (11–45) | 72 (55–89) | |
| AQ-Short Routine | 0.45 (0.26–0.60) | 0.03 (–0.19 to 0.25) | 0.01 (–0.09 to 0.13) | 0 (0–24) | 38 (7–54) | 62 (46–81) | |||
| AQ-Short Switch | 0.48 (0.30–0.63) | 0.14 (–0.09 to 0.36) | 0.20 (0.07–0.32) | 20 (0–54) | 26 (0–59) | 54 (40–72) | 42 (26–55) | 58 (44–74) | |
| AQ-Short Imagination | 0.52 (0.35–0.65) | 0.24 (0.01–0.45) | 0.11 (–0.01 to 0.25) | 02 (0–50) | 47 (0–62) | 51 (38–67) | 43 (27–57) | 57 (43–73) | |
| AQ-Short Numbers | 0.39 (0.19–0.55) | 0.02 (–0.20 to 0.24) | 0.21 (0.09–0.34) | 36 (0–50) | 0 (0–29) | 64 (5–82) | 36 (22–50) | 64 (50–78) | |
| AP | 0.45 (0.25–0.61) | −0.02 (–0.23 to 0.21) | 0.21 (0.07–0.33) | 18 (0–50) | 23 (0–56) | 59 (44–79) | 36 (19–51) | 64 (49–80) |
AQ-Short, Abridged version of the Autism-Spectrum Quotient; AP, Attention Problems; YASR, Young Adult Self-Report.
Estimates from univariate models; the models were based on means corrected for sex and age where appropriate. 95% Confidence intervals are given in parentheses.