What aspect of language explains why children understand jokes better in middle childhood?

When only a subset of scores (e.g., the lower half) are used to predict an outcome, we should be concerned about the _____ problem.

A) restriction of range B) false positives C) false negatives D) criterion

Assessment centers have been shown to be highly effective in predicting employee performance. Employers should also know that assessment centers have some drawbacks. Which characteristic is not one of these drawbacks?

a. ?They are expensive. b. ?They are time-consuming. c. ?Their effectiveness is less accurate if used in the second step of the selection process. d. ?Their results sometimes add little beyond what can be determined by applicant interviews.