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Current techniques do not provide a reproducible, reliable, or valid basis for assessing clinical skills. The need for large-scale direct observation and standardized assessment procedures has precluded development of better techniques. A project using standardized patients presenting with common clinical problems evaluated the skills of 336 internal medicine residents at 14 New England residency programs in 1289 standardized patient and resident encounters. Results indicated that reproducible assessment of the clinical skills could be achieved in approximately 1 day of testing time using standardized patients. Resident performance improved with years of training, and senior residents and those from programs with stronger reputations performed better and were more homogeneous in ability. Low correlations between standardized-patient-based measures of clinical skills and other evaluation techniques suggested that standardized patients provided unique information. Reactions of residents and faculty to standardized-patient-based evaluations were favorable.

Systematic and effective procedures for developing standardized-patient-based test materials and for training standardized patients have been developed. This technique is best used for measuring data gathering and interviewing skills. Correlations with commonly used evaluation methods were generally low; this may be because standardized patients measure different skills. Local use of this technique by residency programs and the development of regional consortia sharing resources, costs, and expertise are advocated.

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