Table 2.
Piecewise models of the cortisol reactivity trajectories
| Unconditional model | Regressed on positive parenting and income | ||||
|---|---|---|---|---|---|
| Mean | SD | β | B | (SE) | |
| Intercept | .18 | .13*** | |||
| Positive parenting | −.18 | −.03 | (.02) | ||
| Income | −.02 | −.01 | (.01) | ||
| Earlier linear slope | −.06 | .45*** | |||
| Positive parenting | .13 | .08 | (.06) | ||
| Income | .01 | .01 | (.04) | ||
| Later linear slope | −.02 | .12** | |||
| Positive parenting | −.53* | −.10 | (.05) | ||
| Income | .32 | .04 | (.03) | ||
| Quadratic term | −.02 | -a | |||
| Positive parenting | .85 | .07 | (.05) | ||
| Income | −.77 | −.04 | (.03) | ||
Note. All models controlled for child age and sex, time of the day, and last task completed.
a
The variance for the quadratic term was not significant, and was therefore removed from the model.
*
p < .05,
**
p < .01,
***
p < .001