ERIC Number: EJ540323
Record Type: CIJE
Publication Date: 1996
Reference Count: 0
Maximizing Both External and Internal Validity in Longitudinal True Experiments with Voluntary Treatments: The "Combined Modified" Design.
Braver, Sanford L.; Smith, Melanie C.
Evaluation and Program Planning, v19 n4 p287-300 Nov 1996
The Combined Modified Design is presented to overcome problems of internal and external validity in the conduct of true experiments in longitudinal studies. It combines a modified version of the Randomized Invitation Design with the lottery longitudinal experimental field trial situation. (SLD)
Publication Type: Reports - Evaluative; Journal Articles
Education Level: N/A
Authoring Institution: N/A
Note: Special issue titled "Innovative Methodologies for Longitudinal Evaluation of Human Service Programs." Research facilitated by National Institutes of Mental Health Grant No. P50-MH39246 to support the Arizona State University Preventive Intervention Research Center.