In perusing the contents of this issue, I discovered that, once again, the majority of the papers are not experimental. There are several qualitative studies-of teachers' attitudes to student feedback, reflective learning for continuing education, residents' perceptions of outpatient teaching, and assessment expert's view of the framework for assessments, cohort study looking at predictors of motivation for medicine, a survey of teachers' perceptions of student feedback, a correlational study of concurrent validity of a personality test, a review paper on the issue of whether Asian students are rote learners, and 3 randomized trials. One looked at the use of simulation in addition to a PBL session for management of respiratory and cardiac distress, another at web-based learning, and a third examined the effect of testing on retention of CPR skills. So of the 11 original studies, 3 were experimental.I suppose I should be pleased. Todres et al. (2007), in a widely cited review of 2 years of Medical Education and Medical Teacher articles, found only 5% were randomized controlled trials. So at 3/11 = 27%, we're doing much better.Better? Pardon a second. Should we be striving for 100% randomized trials? Is this any measure of quality of research? After all, a study of faculty perception of student feedback is unlikely to benefit from having a control group (randomized of course) who were not given feedback and then asked their perceptions of not getting feedback. For that matter, randomizing students to be Asian or not is a bit impractical. In short, the variety of research designs in the papers in this issue reflect the nature of the research questions asked, which really span the gamut of educational research, and only a few are amenable to experimentation.But what of quality? One carryover from clinical research is a perverse hierarchy of research designs where randomized controlled trial is at the top in quality, case series is at the bottom, and cohort studies are somewhere in the middle. The first problem with this approach is that it is a very limited taxonomy, suitable for epidemiologic studies and little else. The common approach to a study of assessment, looking at reliability and validity,