Table 3. Mean errors (ME) of the correlation estimates.
| Selection ratio (SR) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| .1 | .2 | .3 | .4 | .5 | .6 | .7 | .8 | .9 | ||
| DRR, artificially dichotomous | MICE | -.12 | -.05 | -.02 | <.01 | <.01 | <.01 | <.01 | <.01 | <.01 |
| Thorndike | -.06 | -.05 | -.05 | -.04 | -.04 | -.03 | -.03 | -.02 | <.01 | |
| DRR, naturally dichotomous | MICE | -.09 | -.04 | -.02 | -.01 | <.01 | <.01 | <.01 | <.01 | <.01 |
| Thorndike | -.05 | -.05 | -.05 | -.05 | -.04 | -.03 | -.02 | -.01 | <.01 | |
| IRR, artificially dichotomous | MICE | -.08 | -.03 | -.01 | <.01 | <.01 | <.01 | <.01 | <.01 | <.01 |
| Thorndike | -.04 | -.02 | -.02 | -.01 | -.01 | -.01 | <.01 | <.01 | <.01 | |
| IRR, naturally dichotomous | MICE | -.07 | -.03 | -.02 | -.01 | <.01 | <.01 | <.01 | <.01 | <.01 |
| Thorndike | -.01 | -.03 | -.04 | -.04 | -.03 | -.03 | -.02 | -.01 | <.01 | |
is the estimate of the biserial correlation coefficient, is the estimate point-biserial correlation coefficient.