**Corrections**

On page 64, the formula for *d*_{D}, the 2 should be square root 2, not 2 without a square root. We thank Marc Glassman for alerting us to the error.

All of the errors below were pointed out to us by Avi Kluger, and we thank him for doing so.

On page 73, the value for *r*_{D} is -.60, not .60. Note too that to compute an effect size *r* for individuals, we correlate gender with the outcome using the individual dataset to obtain a value of -0.37 (not .49)