مقایسهٔ روشها
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| طرح آزمایشی تطبیقی پیشآزمون-پسآزمون× | طرح آزمایشی پیشآزمون-پسآزمون بلوکبندیشده× | |
|---|---|---|
| حوزه | طراحی آزمایش | طراحی آزمایش |
| خانواده | Process / pipeline | Process / pipeline |
| سال پیدایش≠ | 2000s (integration of adaptive principles with classic pre-post structure) | 1935 (blocking, Fisher); 1963 (pretest-posttest + blocking synthesis, Campbell & Stanley) |
| پدیدآور≠ | Synthesizes Campbell & Stanley (1963) pretest-posttest framework with adaptive design methodology formalized by Chow & Chang (2000s) | Donald T. Campbell & Julian C. Stanley (systematized); blocking technique from Ronald A. Fisher |
| نوع | Experimental design | Experimental design |
| منبع بنیادین | Campbell, D. T., & Stanley, J. C. (1963). Experimental and Quasi-Experimental Designs for Research. Rand McNally. link ↗ | Campbell, D. T., & Stanley, J. C. (1963). Experimental and Quasi-Experimental Designs for Research. Rand McNally. link ↗ |
| نامهای دیگر | adaptive pre-post design, adaptive pretest-posttest trial, adaptive two-period design, pre-post adaptive experiment | blocked pre-post design, RBPP design, block-randomized pretest-posttest design, randomized block pre-post control group design |
| مرتبط | 6 | 6 |
| خلاصه≠ | An adaptive pretest-posttest experimental design measures all participants before and after an intervention while allowing pre-specified modifications to the trial — such as sample size re-estimation, treatment arm dropping, or randomization ratio adjustment — based on accumulated interim data. It combines the interpretive power of change-score analysis with the efficiency gains and ethical safeguards of adaptive methodology, making it particularly valuable in clinical, educational, and behavioral research where early data can inform better resource allocation. | The blocked pretest-posttest experimental design combines blocking — grouping participants into homogeneous strata before randomization — with pre- and post-intervention measurement. Blocking controls for known sources of variability (e.g., baseline ability, gender, site), while the pretest-posttest structure quantifies change scores directly. Together, they reduce error variance and increase statistical power compared to a simple pretest-posttest design, making this approach well suited to educational, clinical, and behavioral intervention studies. |
| ScholarGateمجموعهداده ↗ |
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