Table A3.
Linear mixed-effects Model 3 results quantifying the impact of vowel on the linear relationship between subglottal pressure and accelerometer (ACC) signal magnitude.
| Condition | Estimate ± SE | Estimate ± SE wrt /a/ | df | p | r |
|---|---|---|---|---|---|
| Females | |||||
| Intercept (cm H2O) | |||||
| /a/ | 3.01 ± 0.20 | — | — | — | — |
| /i/ | — | 0.31 ± 0.09 | 4936.55 | < .001* | .05 |
| /u/ | — | 0.48 ± 0.09 | 4948.54 | < .001* | .08 |
| Slope ([cm H2O]/[cm/s2]) | |||||
| ACC × /a/ | 13.05 ± 2.23 | — | — | — | — |
| ACC × /i/ | — | 0.17 ± 0.15 | 4960.00 | .27 | .02 |
| ACC × /u/ | — | −0.07 ± 0.15 | 4959.39 | .62 | .01 |
| Males | |||||
| Intercept (cm H2O) | |||||
| /a/ | 3.30 ± 0.58 | — | — | — | — |
| /i/ | — | 0.81 ± 0.09 | 3331.88 | < .001* | .15 |
| /u/ | — | 0.83 ± 0.09 | 3330.21 | < .001* | .17 |
| Slope ([cm H2O]/[cm/s2]) | |||||
| ACC × /a/ | 23.18 ± 9.83 | — | — | — | — |
| ACC × /i/ | — | −0.98 ± 0.18 | 3332.38 | < .001* | .09 |
| ACC × /u/ | — | −1.87 ± 0.17 | 3332.40 | < .001* | .19 |
Note. For the vowel /a/ reference condition, the estimates of intercept and slope are shown. For the vowels /i/ and /u/, the estimates of intercepts and slopes are shown with reference to (wrt) those for vowel /a/. The standard error (SE), degrees of freedom (df), p value, and effect size (r) are reported for each estimate. Em dashes indicate data not applicable. All slope values were multiplied by 1,000 for readability. The values in the /i/ and /u/ estimate columns are in reference (±) to the modal estimate values to the left. The values in the /i/ and /u/ estimate columns are in reference to the associated /a/ estimate values.
p < .0125.