In selecting representative samples, the technique that specifies that the researcher begins by identifying a large number of units of individuals who have a feature in common, and then randomly selects some of those units, is known as

Actuarial judgments are more accurate than clinical judgments for each of the following

reasons EXCEPT a. clinical judgments are influenced byinformation that is salient at the time. b. clinicians do not always produce the same judgment given the same set of data. c. a clinician's judgment often lacks the benefit of feedback. d. actuarial judgments are more reliable. e. patients typically provide more accurateinformation in an actuarial procedure.

One study found that for every hour of playing an educational DVD to your 10-month old they will:

a. increase the words they understand significantly. b. increase the words they understand by 8-16 words. c. decrease the words they understand by 8-16 words. d. decrease the words they understand by over 20 words.