Reliability and Validity of the qualitative interpretation of sentence completions: A single case statistical study

Based on the sentence completions of a psychiatric patient, ratings were assigned on a number of personality dimensions by six clinical psychologists and 10 graduate students. Independent ratings by a psychologist and a psychiatrist who had interviewed the patient and had access to all the clinical background material, including case history, autobiography, and other tests, served as the criterion. A high degree of validity and interrater reliability was obtained by both clinicians and students with insignificant differences between them. Confidence in judgment was associated with extreme ratings but not with higher validity.