Table 1.
Results From Linear Mixed Models Testing the Effect of Experimental Factors on Fundamental Frequency (F0) and Formant Spacing (ΔF) of Girls and Boys
| Sex and predictor | F0 | ΔF | ||
|---|---|---|---|---|
| F | p | F | p | |
| Girls (n = 42) | ||||
| Intercept | F(1, 167.44) = 1,253.72 | < .001 | F(1, 73.99) = 14,304.23 | < .001 |
| Age group | F(2, 36.473) = 0.06 | .936 | F(2, 36.87) = 19.59 | < .001 |
| Occupation type | F(2, 290.94) = 23.04 | < .001 | F(2, 288.96) = 27.51 | < .001 |
| Occupation rating | F(1, 298.77) = 0.02 | .869 | F(1, 291.45) = 1.98 | .16 |
| Age Group × Occupation Type | F(4, 288.04) = 4.51 | .001 | F(4, 288.05) = 2.08 | .082 |
| Boys (n = 40) | ||||
| Intercept | F(1, 177.16) = 1,489.10 | < .001 | F(1, 73.33) = 12,715.94 | < .001 |
| Age group | F(2, 40.09) = 1.05 | .359 | F(2, 39.745) = 9.28 | < .001 |
| Occupation type | F(2, 305.53) = 4.25 | .015 | F(2, 303.40) = 15.52 | < .001 |
| Occupation rating | F(1, 309.97) = 4.34 | .038 | F(1, 304.64) = 1.637 | .202 |
| Age Group × Occupation Type | F(4, 303.92) = 6.15 | < .001 | F(4, 302.96) = 1.273 | .281 |