Table 2.
Mean Bias and Power/Type I Error Rates in Study 1
| Model Parameter | No Retest | Single Boost Retest | Incremental Retest per Occasion | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Model 1a |
Model 1b |
Model 1c |
Model 1d |
Model 1e |
||||||
| Bias | Power | Bias | Power | Bias | Power | Bias | Power | Bias | Power | |
| Age Slope | ||||||||||
| c = −0.25, w = 3, r = 20 | 0.00 | 1.00 | −0.22 | 1.00 | −0.01 | 0.89 | −0.25 | 1.00 | 0.19 | 0.05 |
| c = −0.25, w = 3, r = 40 | −0.01 | 1.00 | −0.24 | 1.00 | −0.01 | 0.88 | −0.25 | 1.00 | 0.11 | 0.05 |
| c = −0.25, w = 6, r = 20 | 0.00 | 1.00 | −0.07 | 1.00 | 0.00 | 1.00 | −0.25 | 1.00 | 0.09 | 0.06 |
| c = −0.25, w = 6, r = 40 | 0.00 | 1.00 | −0.15 | 1.00 | 0.00 | 1.00 | −0.25 | 1.00 | −0.23 | 0.07 |
| c = 0, w = 3, r = 20 | 0.00 | 1.00 | 0.00 | 1.00 | 0.02 | 0.85 | 0.00 | 1.00 | 0.16 | 0.04 |
| c = 0, w = 3, r = 40 | 0.01 | 1.00 | 0.00 | 1.00 | 0.01 | 0.88 | 0.00 | 1.00 | 0.21 | 0.06 |
| c = 0, w = 6, r = 20 | 0.00 | 1.00 | 0.00 | 1.00 | 0.00 | 1.00 | 0.00 | 1.00 | 0.07 | 0.07 |
| c = 0, w = 6, r = 40 | 0.00 | 1.00 | 0.00 | 1.00 | 0.00 | 1.00 | 0.00 | 1.00 | 0.13 | 0.06 |
| c = 0.25, w = 3, r = 20 | 0.00 | 1.00 | 0.22 | 1.00 | 0.00 | 0.88 | 0.24 | 1.00 | 0.08 | 0.05 |
| c = 0.25, w = 3, r = 40 | 0.00 | 1.00 | 0.25 | 1.00 | 0.00 | 0.87 | 0.25 | 1.00 | 0.62 | 0.04 |
| c = 0.25, w = 6, r = 20 | 0.00 | 1.00 | 0.08 | 1.00 | 0.00 | 1.00 | 0.25 | 1.00 | 0.13 | 0.06 |
| c = 0.25, w = 6, r = 40 | 0.00 | 1.00 | 0.15 | 1.00 | 0.00 | 1.00 | 0.25 | 1.00 | 0.37 | 0.05 |
| Cohort Slope | ||||||||||
| c = −0.25, w = 3, r = 20 | 0.00 | 0.25 | 0.01 | 0.12 | −0.19 | 0.05 | ||||
| c = −0.25, w = 3, r = 40 | 0.01 | 0.31 | 0.01 | 0.14 | −0.10 | 0.05 | ||||
| c = −0.25, w = 6, r = 20 | 0.00 | 0.55 | 0.00 | 0.49 | −0.08 | 0.05 | ||||
| c = −0.25, w = 6, r = 40 | 0.00 | 0.89 | 0.00 | 0.78 | 0.23 | 0.05 | ||||
| c = 0, w = 3, r = 20 | 0.00 | 0.03 | −0.02 | 0.05 | −0.17 | 0.03 | ||||
| c = 0, w = 3, r = 40 | −0.01 | 0.07 | −0.01 | 0.05 | −0.21 | 0.05 | ||||
| c = 0, w = 6, r = 20 | 0.00 | 0.05 | 0.00 | 0.07 | −0.06 | 0.06 | ||||
| c = 0, w = 6, r = 40 | 0.00 | 0.05 | 0.00 | 0.03 | −0.14 | 0.05 | ||||
| c = 0.25, w = 3, r = 20 | 0.00 | 0.26 | −0.01 | 0.13 | −0.08 | 0.04 | ||||
| c = 0.25, w = 3, r = 40 | 0.01 | 0.34 | 0.00 | 0.11 | −0.62 | 0.05 | ||||
| c = 0.25, w = 6, r = 20 | 0.00 | 0.53 | 0.00 | 0.46 | −0.13 | 0.05 | ||||
| c = 0.25, w = 6, r = 40 | 0.00 | 0.92 | 0.00 | 0.81 | −0.37 | 0.05 | ||||
| Retest Slope | ||||||||||
| c = −0.25, w = 3, r = 20 | 0.34 | 0.20 | 0.01 | 0.05 | 0.26 | 0.13 | −0.18 | 0.05 | ||
| c = −0.25, w = 3, r = 40 | 0.34 | 0.22 | 0.00 | 0.05 | 0.24 | 0.12 | −0.11 | 0.05 | ||
| c = −0.25, w = 6, r = 20 | 0.20 | 0.11 | −0.03 | 0.04 | 0.23 | 0.12 | −0.10 | 0.05 | ||
| c = −0.25, w = 6, r = 40 | 0.46 | 0.38 | 0.01 | 0.05 | 0.25 | 0.12 | 0.23 | 0.05 | ||
| c = 0, w = 3, r = 20 | −0.01 | 0.06 | −0.04 | 0.05 | −0.02 | 0.06 | −0.18 | 0.04 | ||
| c = 0, w = 3, r = 40 | 0.02 | 0.06 | 0.01 | 0.05 | 0.02 | 0.05 | −0.19 | 0.05 | ||
| c = 0, w = 6, r = 20 | −0.01 | 0.03 | −0.01 | 0.03 | −0.01 | 0.04 | −0.07 | 0.06 | ||
| c = 0, w = 6, r = 40 | 0.01 | 0.04 | 0.00 | 0.05 | −0.01 | 0.04 | −0.15 | 0.05 | ||
| c = 0.25, w = 3, r = 20 | −0.34 | 0.19 | −0.01 | 0.06 | −0.25 | 0.13 | −0.08 | 0.05 | ||
| c = 0.25, w = 3, r = 40 | −0.37 | 0.27 | −0.01 | 0.06 | −0.26 | 0.14 | −0.62 | 0.05 | ||
| c = 0.25, w = 6, r = 20 | −0.25 | 0.14 | −0.03 | 0.07 | −0.27 | 0.11 | −0.15 | 0.04 | ||
| c = 0.25, w = 6, r = 40 | −0.46 | 0.40 | −0.01 | 0.02 | −0.25 | 0.12 | −0.38 | 0.05 | ||
Table 2 Note: c = age-cohort effect, w = waves, and r = cohort age range. Power rates for all retest slopes actually reflect Type I error rates given their omission from the generation model. The incremental retest slope estimates reported in Models 1d and 1e reflect those from the first incremental retest effect (at the second occasion).