Table 2. Treatment effect on the latent growth model parameters.
| Mean (SE) treatment | Mean (SE) control | Effect size | p-value | |
|---|---|---|---|---|
| Responsivity | ||||
| Intercept at 6 months | 9.00 (0.17) | 8.95 (0.19) | 0.08 | 0.564 |
| Intercept at 18 months | 9.24 (0.13) | 9.28 (0.12) | -0.01 | 0.982 |
| Intercept at 36 months | 9.59 (0.14) | 9.77 (0.12) | -0.20 | 0.212 |
| Slope 6–36 months | 1.94 (0.69) | 2.72 (0.78) | -0.18 | 0.229 |
| Acceptance | ||||
| Intercept at 6 months | 5.75 (0.16) | 5.71 (0.17) | 0.05 | 0.408 |
| Intercept at 18 months | 6.01 (0.09) | 5.77 (0.11) | 0.28 | 0.015 |
| Intercept at 36 months | 6.39 (0.16) | 5.87 (0.17) | 0.36 | 0.014 |
| Slope 6–36 months | 2.13 (0.89) | 0.55 (0.85) | 0.19 | 0.048 |
| Organization | ||||
| Intercept at 6 months | 5.59 (0.07) | 5.65 (0.07) | -0.06 | 0.690 |
| Intercept at 18 months | 5.50 (0.05) | 5.42 (0.05) | 0.20 | 0.169 |
| Intercept at 36 months | 5.37 (0.07) | 5.09 (0.09) | 0.37 | 0.011 |
| Slope 6–36 months | -0.73 (0.34) | -1.87 (0.38) | 0.32 | 0.033 |
| Learning material | ||||
| Intercept at 6 months | 8.08 (0.16) | 7.74 (0.15) | 0.29 | 0.023 |
| Intercept at 18 months | 8.23 (0.09) | 8.04 (0.09) | 0.27 | 0.037 |
| Intercept at 36 months | 8.45 (0.08) | 8.48 (0.06) | -0.08 | 0.573 |
| Slope 6–36 months | 1.22 (0.65) | 2.46 (0.58) | -0.27 | 0.036 |
| Involvement | ||||
| Intercept at 6 months | 4.27 (0.14) | 4.41 (0.12) | -0.05 | 0.804 |
| Intercept at 18 months | 4.19 (0.11) | 4.15 (0.1) | 0.10 | 0.432 |
| Intercept at 36 months | 4.07 (0.17) | 3.78 (0.17) | 0.22 | 0.116 |
| Slope 6–36 months | -0.66 (0.68) | -2.11 (0.67) | 0.21 | 0.144 |
| Variety | ||||
| Intercept at 6 months | 4.15 (0.15) | 3.76 (0.15) | 0.28 | 0.012 |
| Intercept at 18 months | 4.11 (0.10) | 3.9 (0.11) | 0.20 | 0.124 |
| Intercept at 36 months | 4.03 (0.12) | 4.13 (0.11) | -0.09 | 0.560 |
| Slope 6–36 months | -0.4 (0.59) | 1.24 (0.56) | -0.03 | 0.009 |
The table shows the mean score and standard error (SE) of the HOME dimensions (responsivity, acceptance, organization, learning material, involvement, variety) at each time point (i.e., intercept at 6, 18, and 36 months) and the overall rate of change over time between 6 and 36 months (i.e., slope) for the treatment and control groups. Difference between the treatment and control groups are expressed as effect size (Hedge’s g), and the p-values for their comparison are based on Wald tests.