Infants' long-term memory abilities have been investigated by using all of the following techniques except

To study adolescents' attitudes toward contraceptive use, a researcher recruits subjects from a waiting room of a community clinic that offers free contraceptive services to all. This researcher has a sample that is ____

a. not representative of all adolescents b. similar to the general population of adolescents c. representative of adolescents in America, but not other developed nations d. representative of female adolescents and not males

The main factor that determines whether a student will be interested in a course is the

a. instructor's teaching style. b. student's attitude. c. readability of the textbook. d. match between the instructor's personality and that of the student.