השוואת שיטות

	עיצוב ניסויי אדפטיבי של מבחן קדם-מבחן-לאחר	מערך ניסויי של מבחן קדם ומבחן עוקב
תחום	תכנון ניסויים	תכנון ניסויים
משפחה	Process / pipeline	Process / pipeline
שנת המקור	2000s (integration of adaptive principles with classic pre-post structure)	1963 (formalized in Campbell & Stanley)
הוגה השיטה	Synthesizes Campbell & Stanley (1963) pretest-posttest framework with adaptive design methodology formalized by Chow & Chang (2000s)	Donald T. Campbell and Julian C. Stanley
סוג	Experimental design	Experimental / quasi-experimental research design
מקור מכונן	Campbell, D. T., & Stanley, J. C. (1963). Experimental and Quasi-Experimental Designs for Research. Rand McNally.	Campbell, D. T., & Stanley, J. C. (1963). Experimental and Quasi-Experimental Designs for Research. Rand McNally.
כינויים	adaptive pre-post design, adaptive pretest-posttest trial, adaptive two-period design, pre-post adaptive experiment	pretest-posttest design, before-after design, pre-post design, two-wave experimental design
קשורות	6	5
תקציר	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 pretest-posttest experimental design measures participants on the outcome variable before and after treatment, typically with random assignment to treatment and control groups. The difference between pre- and post-scores isolates the treatment effect from baseline variation, making this one of the most widely used frameworks in experimental and quasi-experimental research across education, psychology, medicine, and the social sciences.