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2. The scale for the assessment of positive symptoms (SAPS);Andreasen,1984
3. The rationale and clinical relevance of repertory grid technique;Bannister;British Journal of Psychiatry,1965
4. A repertory grid test of schizophrenic thought disorder;Bannister;British Journal of Social and Clinical Psychology,1965
5. The omnipotence of voices: Testing the validity of a cognitive model;Birchwood;Psychological Medicine,1997