Table 3.
Pearson’s correlation coefficients
| Variable | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
| 1. PSI | – | |||||||
| 2. Age | − 0.025 | – | ||||||
| 3. Communication—ADOS (A) | − 0.241 | 0.137 | – | |||||
| 4. Communication—ADI-R (B) | − 0.038 | 0.083 | 0.145 | – | ||||
| 5. Reciprocal social interaction—ADOS (B) | − 0.122 | 0.083 | 0.550** | 0.143 | – | |||
| 6. Reciprocal social interaction—ADI-R (A) | − 0.028 | 0.153 | 0.060 | 0.509** | 0.263 | – | ||
| 7. Stereotypic/repetitive behavior—ADOS (D) | − 0.057 | − 0.079 | 0.313* | 0.098 | 0.338* | − 0.110 | – | |
| 8. Stereotypic/repetitive behavior—ADI-R (C) | − 0.036 | − 0.010 | 0.161 | 0.346** | − 0.006 | 0.252 | 0.283* | – |
PSI processing speed index, ADOS autism diagnostic observation scale, ADI-R autism diagnostic interview—revised
*p < 0.007 (α adjusted according to Bonferoni)
**p < 0.001