Table 2.
Latent Growth Curve Model Standardized Regression Estimates (Betas) and Standard Errors for Three Intervention Groups
| Model 1: Memory (N=693) | Model 2: Reasoning (N=682) | Model 3: Speed (N=687) | |
|---|---|---|---|
| Intercept | |||
| Age | −0.316 (0.034)** | −0.329 (0.030)** | 0.397 (0.034)** |
| Female | 0.238 (0.034)** | 0.021 (0.031) | −0.034 (0.036) |
| African American | −0.246 (0.040)** | −0.350 (0.034)** | 0.161 (0.041)** |
| Education | 0.248 (0.035)** | 0.366 (0.031)** | −0.124 (0.038)* |
| Health | −0.013 (0.033) | −0.031 (0.030) | −0.015 (0.035) |
| CES-D | −0.115 (0.034)* | −0.081 (0.030)* | 0.061 (0.036) |
| Training Gain | |||
| Intercept | −0.427 (0.053)** | −0.205 (0.056)** | −0.668 (0.033)** |
| Age | −0.246 (0.052)** | −0.190 (0.050)** | 0.246 (0.042)** |
| Female | −0.016 (0.051) | 0.067 (0.045) | −0.017 (0.037) |
| African American | −0.182 (0.058)* | −0.192 (0.056)* | 0.072 (0.043) |
| Education | 0.109 (0.053)* | 0.060 (0.052) | 0.050 (0.040) |
| Health | −0.061 (0.047) | 0.020 (0.045) | 0.022 (0.037) |
| CES-D | −0.150 (0.049)* | −0.113 (0.045)* | 0.022 (0.037) |
| Slope | |||
| Intercept | 0.210 (0.115) | 0.208 (0.102)* | 0.270 (0.106)* |
| Age | −0.547 (0.120)** | −0.420 (0.097)** | 0.193 (0.121)* |
| Female | −0.071 (0.101) | 0.059 (0.080) | −0.046 (0.096) |
| African American | −0.050 (0.115) | 0.043 (0.103) | 0.001 (0.106) |
| Education | 0.099 (0.106) | −0.051 (0.093) | −0.153 (0.104) |
| Health | −0.083 (0.091) | −0.106 (0.082) | 0.103 (0.094) |
| CES-D | 0.086 (0.104) | −0.094 (0.084) | −0.021 (0.093) |
|
| |||
| Model Fit | |||
| RMSEA | 0.045 | 0.059 | 0.041 |
| CFI | 0.977 | 0.974 | 0.970 |
| SRMR | 0.022 | 0.015 | 0.022 |
Note. For space, regression estimates for the five dummy-coded variables reflecting recruitment site are not shown. CES-D=Center for Epidemiologic Studies Depression Scale; RMSEA=Root Mean Squared Error of Approximation; CFI=Comparative Fit Index; SRMR=Standardized Root Mean Square Residual.
*
p<.05
**
p<.001