Descriptor
| Evaluation Methods | 1 |
| Longitudinal Studies | 1 |
| Mental Health Programs | 1 |
| Program Evaluation | 1 |
| Research Design | 1 |
| Research Methodology | 1 |
| Sampling | 1 |
| Selection | 1 |
Source
| Evaluation and Program… | 1 |
Author
| Humphreys, Keith | 1 |
Publication Type
| Journal Articles | 1 |
| Reports - Evaluative | 1 |
Education Level
Audience
Location
Laws, Policies, & Programs
Assessments and Surveys
What Works Clearinghouse Rating
Peer reviewedHumphreys, Keith; And Others – Evaluation and Program Planning, 1996
The self-selection problem in program evaluation is explored, and two ways of addressing it, covariate control approaches and two-stage sample selection models, are described. A longitudinal study of the effects of participation in Alcoholics Anonymous illustrates both approaches and shows the advantages of the two-step procedure. (SLD)
Descriptors: Evaluation Methods, Longitudinal Studies, Mental Health Programs, Program Evaluation
