পদ্ধতির তুলনা করুন

	পাইলট ন্যাচারাল এক্সপেরিমেন্ট	পাইলট র‍্যান্ডমাইজড কন্ট্রোলড ট্রায়াল
ক্ষেত্র	পরীক্ষামূলক নকশা	পরীক্ষামূলক নকশা
পরিবার	Process / pipeline	Process / pipeline
উদ্ভবের বছর	2000s–2010s (as formalized practice)	1990s–2000s (methodological formalization)
প্রবর্তক	Combination of natural experiment tradition (Dunning, Angrist, Pischke) and pilot study methodology	Formalized through clinical trials methodology community
ধরন	Quasi-experimental feasibility design	Experimental feasibility design
মৌলিক উৎস	Dunning, T. (2012). Natural Experiments in the Social Sciences: A Design-Based Approach. Cambridge University Press. ISBN: 9781107017412	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.
অপর নাম	feasibility natural experiment, preliminary natural experiment, pilot quasi-experiment, exploratory natural experiment	pilot RCT, feasibility RCT, pilot trial, preliminary RCT
সম্পর্কিত	4	5
সারসংক্ষেপ	A pilot natural experiment is a small-scale preliminary study that exploits an existing exogenous event or policy variation to test whether a full natural experiment is viable. It preserves the core logic of natural experiments — using real-world discontinuities to approximate causal inference — while explicitly scoping the work to assess data availability, group comparability, effect detectability, and procedural feasibility before committing resources to a larger study.	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.