Which approach to the classification of abnormal behavior uses statistical criteria to differentiate between normal and abnormal?

In Csikszentmihalyi's research using pagers telling subjects when to fill out a

booklet, the only time job satisfaction was high was when challenge was _____ and skill was _____. (a) average, high (b) high, high (c) low, high (d) medium, medium

A researcher administers an antidepressant drug to a group of depressed patients and

over a period of time they improve. The researcher claims that their improvement is due to the drug, even though she did not control for outside factors such as improved emotional support from friends, or natural improvement over time. This study lacks ______. a. analogue validity c. internal validity b. construct validity d. external validity