Small numbers are an opportunity, not a problem

Aims: outcomes of research in education and training are partly a function the context which that study takes place, questions we ask, what is feasible. Many about learning, involves repeated measurements particular time window, practical usually such offering an intervention to some but not all learners does make sense or unethical. For quality assurance other purposes, centers may have very locally oriented they seek answer, as whether can be considered effective their small numbers learners. While rationale behind design this kind studies interest much wider community, for example transferability findings contexts, people often discouraged report on at conferences educational journals. The aim paper counter discouragement instead encourage see opportunity problem.Method: worked parametric non-parametric method type situation, using simulated data zero-cost Open Source statistical program R version 4.0.5.Results: contrary method, provide estimates effectiveness individual participant, account trends different phases study. However, provides solution several situations where should used.Conclusion: Given costs research, lessons learned from methods available, opportunity, problem.