TABLE 4.
Correlations Between Participants With ASD IQ, First-Degree Relatives IQ, Timing of Diagnosis, and Services and Demographics
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
|---|---|---|---|---|---|---|---|---|---|
| 1. Average of parental IQ (n = 163) | — | — | — | — | — | — | — | — | — |
| 2. Participants with ASD IQ (n = 250) | 0.1 | — | — | — | — | — | — | — | — |
| 3. Non-diagnosed sibling IQ (n = 90) | 0.2 | −0.1 | — | — | — | — | — | — | — |
| 4. Age at diagnosis (n = 267) | −0.1 | 0.2* | −0.1 | — | — | — | — | — | — |
| 5. Age at first services (n = 235) | −0.1 | 0.3** | −0.1 | 0.5** | — | — | — | — | — |
| 6. Participants with ASD SRS score (n = 260) | −0.1 | −0.0 | 0.0 | 0.1* | 0.0 | — | — | — | — |
| 7. Mother IQ (n = 162) | 0.9** | 0.1 | 0.1 | −0.0 | 0.0 | 0.0 | — | — | — |
| 8. Father IQ (n = 135) | 0.8** | −0.0 | 0.2 | −0.1 | −0.1 | −0.2 | 0.4** | — | — |
| 9. Family income (n = 241) | 0.2* | 0.1 | 0.1 | −0.1 | −0.1 | −0.1 | 0.2* | 0.2* | — |
| 10. Mothers education level (n = 251) | 0.3** | 0.2* | 0.3* | −0.1 | −0.1 | −0.1 | 0.3** | 0.3** | 0.6** |
SRS, Social Responsiveness Scale; —, value provided below the diagonal.
*
Indicates P value significant at .05 level (2-tailed).
**
Indicates P value significant at .01 level (2-tailed).