Table 2. Correlation Matrix Relating Demographic and Speech Acoustic Variables.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1. Mean F0 | -- | |||||||||
| 2. Mean ΔF0 | .27** | -- | ||||||||
| 3. Mean F0SD | .32** | .57** | -- | |||||||
| 4. Infant age | -.20** | -.12* | .07 | -- | ||||||
| 5. Gender | .05 | .07 | .02 | .01 | -- | |||||
| 6. Mother's age | -.12* | .04 | -.04 | -.03 | .03 | -- | ||||
| 7. Education | .01 | .11 | .18** | -.03 | .01 | .32** | -- | |||
| 8. # Children | -.05 | -.16** | -.06 | .10 | .01 | .18** | -.18** | -- | ||
| 9. Minority | -.03 | -.11 | -.08 | .14* | .01 | -.27** | -.28** | .06 | -- | |
| 10. BDI score | -.05 | -.17** | -.05 | -.01 | -.03 | -.13* | -.32** | .15* | .06 | -- |
“minority” was contrast coded, where 1 = ethnic minority, -1 = white, non-Hispanic.
*
signifies p = .05;
**
signifies p = .01. Mean F0 refers to the average pitch across all 3 distinct “gorilla” utterances; mean ΔF0 refers to the average pitch range, a gross measure of change in pitch; mean F0 SD refers to the standard deviation of the pitch in “gorilla” utterances, a measure of the dispersion of F0 in relation to the mean.