Internal and external validity are key concepts in understanding the scientific method and fostering critical thinking. This article describes a class demonstration of a "botched" experiment to teach validity to undergraduates. Psychology students (N = 75) completed assessments at the beginning of the semester, prior to and immediately following…

Describes a classroom demonstration that illustrates the error of using an inappropriate test to conclude that a specific ability does not exist within a subject or a population. Shows ways to expand the lesson to cover the issue of null conclusions. Points out social and methodological implications of the demonstration. (Author/LS)

Reports study of 288 graduate psychology majors to determine what variables correlated with grade point averages in psychology. Reports three clusters of significant variables: (1) high school grades in verbal areas; (2) achievement in college general studies courses; and (3) mathematics aptitude and achievement in college. (CFR)

Describes a technique for demonstrating personality scale validation techniques to introductory psychology students. Claims that the technique promotes a better grasp of the principles of test validation. Results include better class discussion, written reports, and examination grades. Suggests that introducing practical applications before…

Utilizes the Psychology As Science (PAS) questionnaire to examine student's perceptions. PAS consists of a series of statements about Psychology followed by a strongly agree/disagree option. Reveals an overwhelming acceptance of psychology as a science among students. Includes a statistical breakdown of PAS statements and suggestions for future…