Rating scales in research: The case of negative symptoms

Sue Thiemann*, John G. Csernansky, Philip A. Berger

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

85 Scopus citations


Two measures of negative schizophrenic symptoms, the Scale for the Assessment of Negative Symptoms and the withdrawal-retardation subscale of the Brief Psychiatric Rating Scale, are found to be redundant when used together. Studies incorporating redundant measures have numerous disadvantages. Using multiple scales increases the cost and effort for the investigator, places a greater burden on research subjects, and compromises the interpretability of findings by increasing the probability of both Type I and Type II errors. A strategy for evaluating the use of multiple rating scales is suggested, and the theoretical basis of this strategy is discussed.

Original languageEnglish (US)
Pages (from-to)47-55
Number of pages9
JournalPsychiatry Research
Issue number1
StatePublished - Jan 1987


  • Symptom assessment
  • rating scales
  • redundant measures

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Biological Psychiatry

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