David (1990), stating that insight cannot be assessed simply as “present” or “absent,” developed this scale—which is administered by clinicians to quantitatively assess insight in patients with schizophrenia—based on three components: treatment compliance, awareness of the illness, and accurate identification of psychotic experiences. It is a semi-structured scale consisting of 8 questions and administered by a clinician. The 7 subscales are titled “Acceptance of treatment” (1a), “Desire for treatment” (1b), “Awareness of illness” (2a), “Awareness of having a mental illness” (2b), “explanation of the illness” (2c), “belief in the truth of delusions” (3a), and “explanation of experiences” (3b), as well as a subscale titled “reaction to disbelief.”
Scoring: The maximum total score for the first 7 questions is 14. The eighth question (........how do you feel when people do not believe you in such situations?) is presented hypothetically; whether to ask this question is left to the interviewer’s discretion. Including this question, the maximum total score is 18. A high score indicates a high level of insight. The reliability and validity study of this scale in Turkish was conducted by Aslan et al. (2001).