The pretest-posttest design referred to as Design 2 by Campbell and Stanley (1963) is commonly used in educational research and evaluation. The tenability of the assumption of a zero population difference commonly used with this design is questioned. A nonzero population estimate based on the mean difference observed in test-retest reliability…

To determine if the ethnocentric perceptions of students would be influenced by participation in a 3-week social studies unit on "The Contributions of Minority Ethnic Groups to American Civilization," a study was made utilizing 114 students in five 12th grade social studies classes (three experimental and two control). The investigation attempted…

An application of evaluation methodology to innovative educational programs through a case study of a Chicago suburban high school program for alternative education is presented. The evaluation methodology encompasses the difficulty in combining comparative programs, individual-diagnostic, and individual developmental measures, the selection of…