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| Pilot ABAB Design× | Pilot Randomiseret Kontrolleret Forsøg× | |
|---|---|---|
| Fagområde | Forsøgsdesign | Forsøgsdesign |
| Familie | Process / pipeline | Process / pipeline |
| Oprindelsesår≠ | 1960s (ABAB base); pilot application codified c. 2000s | 1990s–2000s (methodological formalization) |
| Ophavsperson≠ | Derived from ABAB reversal design (Sidman, 1960); pilot framing formalized in behavioral intervention feasibility literature (late 20th–early 21st century) | Formalized through clinical trials methodology community |
| Type≠ | Single-subject experimental feasibility design | Experimental feasibility design |
| Oprindelig kilde≠ | Byiers, B. J., Reichle, J., & Symons, F. J. (2012). Single-subject experimental design for evidence-based practice. American Journal of Speech-Language Pathology, 21(4), 397–414. DOI ↗ | Thabane, L., Ma, J., Chu, R., Cheng, J., Ismaila, A., Rios, L. P., ... & Goldsmith, C. H. (2010). A tutorial on pilot studies: the what, why and how. BMC Medical Research Methodology, 10(1), 1. DOI ↗ |
| Aliasser | pilot reversal design, feasibility ABAB design, pilot withdrawal design, pilot single-subject reversal | pilot RCT, feasibility RCT, pilot trial, preliminary RCT |
| Relaterede≠ | 6 | 5 |
| Resumé≠ | A Pilot ABAB design is a small-scale feasibility trial of the ABAB reversal design, conducted with one or a few participants to test whether an intervention produces reliable behavior change under alternating baseline and treatment conditions before committing resources to a larger study. It combines the internal-validity logic of the ABAB reversal with the limited scope and preliminary aims of a pilot investigation. | A pilot randomized controlled trial (pilot RCT) is a small-scale, fully randomized experiment conducted before a definitive RCT to test the feasibility of study procedures, estimate key parameters such as recruitment rates and effect-size variability, and identify practical barriers. It uses the same randomization, intervention, and measurement protocol as the planned full trial but on a fraction of the target sample. The goal is not to confirm efficacy but to refine and justify the main trial design. |
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