Maximizing both external and internal validity in longitudinal true experiments with voluntary treatments: The "combined modified" design
| Year of publication: |
1996
|
|---|---|
| Authors: | Braver, Sanford L. ; Smith, Melanie C. |
| Published in: |
Evaluation and Program Planning. - Elsevier, ISSN 0149-7189. - Vol. 19.1996, 4, p. 287-300
|
| Publisher: |
Elsevier |