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Five psychiatrists from Missouri and five psychiatrists from Istanbul, Turkey, participated in an interrater reliability study that utilized videotapes to rate symptomatology of 30 schizophrenic patients. Three rating scales were completed for each patient: the Brief Psychiatric Rating Scale, the Itil-Keskiner Psychopathological Rating Scale, and the Seven Point Global Rating Scale. Fifteen of the patients were hospitalized in two Missouri state hospitals and 15 in a Turkish state hospital. This study was conducted to determine if psychiatrists from both cultures would comparably rate patients. Each patient was videotaped while being interviewed by a structured interview prerecorded on cassette tape and operated by a research nurse. The recorded structured interview ensured uniformity of interviewing and permitted rating of patients when convenient for the raters. The study was able to control many of the variables that often can, and do, contaminate interrater reliability studies (Tinsley & Weiss, 1975). The results were that both groups of psychiatrists perceived not only the presence or absence of the same symptoms but also the severity to a significantly dose degree in both groups of patients.
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