ERIC Number: ED337499
Record Type: RIE
Publication Date: 1991-Apr
Reference Count: N/A
Statistical Tests of Significance for the One Group Posttest Only Design.
A research design is described for the situation in which a program, particularly a compensatory education program funded by Chapter 1 of the Hawkins Stafford Act of 1988, can be evaluated when there is no available comparison group and no pretest data. The design requires content specialists to identify which objectives on the posttest were included in the compensatory curriculum (C objectives) and which were included only in the regular curriculum (R objectives). Compensatory students should perform better on the C objectives to which they were exposed in both regular and compensatory curricula than on the R objectives. The analysis would be a simple t-test of the differences between two groups, the C items and the R items. The design is valuable because: (1) students serve as their own control group; (2) it is not necessary to identify a test that can measure pretest and posttest knowledge; and (3) it allows for identification of successful components of the Chapter 1 program. Two exhibits illustrate sample designs. Five figures and two tables present the analysis method and results from a 20-item test for 47 students in grades 1, 2, and 3 in 1987-88 and 34 students in 1988-89. An eight-item list of references is included. (SLD)
Publication Type: Reports - Evaluative; Speeches/Meeting Papers
Education Level: N/A
Authoring Institution: N/A
Identifiers: Education Consolidation Improvement Act Chapter 1; Single Subject Designs; T Test
Note: Paper presented at the Annual Meeting of the American Educational Research Association (Chicago, IL, April 3-7, 1991).