Examines several possible difficulties in interpreting the results of studies which employ Piagetian tasks, especially conservation tasks, with older individuals. Notes that Piaget's clinical method allows more flexibility in the assessment of competence than do more quantifiable techniques. Examines the possibility of task misinterpretation by…

Different methods and instruments used to assess medical problem solving are discussed. Various features of the instruments are compared and suggestions for additional data are made, in order to ensure maximum efficiency in the choice of instruments. (Author/MH)