This article reviews consistent research findings concerning the assessment
of clinical competence during the clerkship phase of the undergraduate med
ical training programme on issues of reliability, validity, effect on train
ing programme and learning behaviour, acceptability and costs. Subsequently
, research findings on the clinical clerkship as a learning environment are
discussed demonstrating that the clinical attachment provides a rather uns
tructured educational framework. Five fundamental questions (why, what, whe
n, how, who) are addressed to generate general suggestions for improving as
sessment on the basis of the evidence on assessment and clinical training.
Good assessment requires a thoughtful compromise between what is achievable
and what is ideal. It is argued that educational effects are eminently imp
ortant in this compromise, particularly in the unstructured clinical settin
g. Maximizing educational effects can be achieved in combination with impro
vements of other measurement qualities of the assessment. Two concrete exam
ples are provided to illustrate the recommended assessment strategies.