Brief Negative Symptom Scale (BNSS)


The BNSS is a 13-item psychiatric rating scale designed to assess the negative symptoms of schizophrenia. The scale is rated after completing a 15-minute interview. The BNSS includes a brief but comprehensive 9 page manual, a workbook to be used when conducting the clinical interview, and a scoresheet. In multiple psychometric studies, the BNSS has demonstrated excellent inter-rater agreement, internal-consistency, test-retest reliability, convergent validity, and discriminant validity. It produces a crisp two-factor solution for the dimensions of motivation and pleasure (anhedonia, avolition, asocality) and emotional expressivity (restricted affect, alogia). The BNSS has been, or is currently in the process of being translated into several languages, including: Spanish, Italian, German, Cantonese, French, Korean, and Turkish. Individuals interested in obtaining BNSS materials and publications can visit our Resources page. Commercial entities wishing to use the BNSS in clinical trials can contact Prophase, which offers professional BNSS training that was developed in consultation with the test developers. Drs. Strauss and Kirkpatrick receive royalties and consultation fees from Prophase LLC in connection with commercial use of the BNSS and other professional activities. Individual researchers/research groups may use the BNSS free of charge and obtain training materials by contacting Dr. Strauss or Dr. Kirkpatrick  

Prodromal Inventory of Negative Symptoms (PINS)


The PINS was developed in collaboration with Vijay Mittal's lab at Northwestern. It is a clinical rating scale designed to assess negative symptoms in the prodromal phase of illness. The measure is currently undergoing revision. To obtain the latest version please email Dr. Strauss or Dr. Mittal:    

Emotional Verbal Learning Test (EVLT)


The EVLT is an emotional analog to many of the popular verbal learning tests used in neuropsychological assessment, in that it is similar in structure and format. However, the word lists contain items representing discrete emotional categories, rather than non-emotional semantic categories. Emotional categories have been validated to reflect happiness, sadness, anger, and anxiety. Participants are administered 5 immediate free recall trials, a distractor list, short delay free recall, short delay cued recall into emotional categories, long delay free recall (20min), long delay cued recall, and long delay yes/no recognition. Our validation studies indicated that the test has strong psychometric properties, as well as clinical utility in terms of separating neuropsychiatric and control participants. The test can be used free of charge. Individuals interested in using the test can find the corresponding test form and original test development and psychometric validation publication linked below. For additional details regarding scoring procedures, scoring programs, etc. please contact Dr. Strauss: