Assessment & Measures

The following clinical assessment measures are useful for assessing the preoccupation, pervasiveness, intensity, inflexibility, significance, conviction, frequency and/or content dimensions of psychosis:


  • Brief Psychiatric Rating Scale (Overall & Gorham, 1962)
  • Positive and Negative Syndrome Scale (Kay et al., 1989)
  • Scale for the Assessment of Positive Symptoms (Andreason, 1984)
  • Scale for the Assessment of Negative Symptoms (Andreason, 1989)
  • Comprehensive Psychopathological Rating Scale (Asberg et al., 1978)

To Quantify the Dimensions of Psychotic Symptoms

  • Psychotic Symptom Rating Scales (Haddock et al.,1999)
  • Topography of Voices Rating Scale (Hustig & Hafner, 1990)
  • Schedule of Assessment of Insight (David, 1990)
  • Voice Power Differential Scale

To Conduct a Cognitive Behavioural Assessment

  • Antecedent and Coping Interview (Tarrier, 1992)
  • Maudsley Assessment of Delusions Scale (Wessely et al., 1993)
  • Cognitive Assessment of Voices: Interview Scale (Chadwick et al., 1996)

To Assess Beliefs & Schemas

  • Evaluative Beliefs Scale (Chadwick et al., 1996)
  • Dysfunctional Working Models Scale (Perris et al.,1998)
  • Beliefs About Voices Questionnaire – R (Chadwick & Birchwood, 1995; 2006)
  • Voices Acceptance & Action Scale (Shawyer et al., 2007)

To Assess Adherence in Conducting CBT

  • Cognitive Therapy Scale for Psychosis (Haddock et al., 2001)
  • Cognitive Therapy for Psychosis Adherence Scale (Startup et al.,