Читать книгу Methods in Psychological Research - Annabel Ness Evans - Страница 89

For each of the following, decide whether a t test, an F test, or a chi-square test might be appropriate:

1 A new teacher decides to put some of the principles he learned in school to the test. He randomly selects half of his class and consistently praises each student for being on the task for a minimum period of time. With the other half of the class, he periodically gives praise for on-task behavior. He wants to know if periodic praise produces more on-task behavior than consistent praise.

2 Psychiatric walk-in clients are randomly assigned to five therapists for short-term counseling. One therapist specializes in psychoanalytic techniques, one in client-centered techniques, one in behavioral techniques, and one in cognitive techniques. The fifth therapist is eclectic, using techniques from each of the therapies. All clients are rated on various scales designed to measure improvement. The researcher compares mean improvement ratings of the clients for each therapist.

3 A statistics professor wants to know if generally there are more or less equal numbers of psychology, sociology, and business students in her classes. She keeps a tally.