THE POSITIVITY OFFSET THEORY OF ANHEDONIA IN SCHIZOPHRENIA
| Autor: | Bern G. Lee, James M. Gold, Gregory P. Strauss, Katherine H. Frost |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
medicine.medical_specialty
Psychosis Anhedonia Positivity offset Stimulus (physiology) Audiology medicine.disease Article 030227 psychiatry Developmental psychology Arousal 03 medical and health sciences Clinical Psychology 0302 clinical medicine Positive emotion mental disorders medicine Normative medicine.symptom Psychology Negative emotion 030217 neurology & neurosurgery psychological phenomena and processes |
| Zdroj: | Clinical psychological science : a journal of the Association for Psychological Science. 5(2) |
| ISSN: | 2167-7026 |
| Popis: | Prior studies have concluded that schizophrenia patients are not anhedonic because they do not report reduced experience of positive emotion to pleasant stimuli. The current study challenged this view by applying quantitative methods validated in the evaluative space model of emotional experience to test the hypothesis that schizophrenia patients evidence a reduction in the normative “positivity offset” (i.e., the tendency to experience higher levels of positive than negative emotional output when stimulus input is absent or weak). Participants included 76 schizophrenia patients and 60 healthy controls who completed an emotional experience task that required reporting the level of positive emotion, negative emotion, and arousal to photographs. Results indicated that although schizophrenia patients evidenced intact capacity to experience positive emotion at high levels of stimulus input, they displayed a diminished positivity offset. Reductions in the positivity offset may underlie volitional disturbance, limiting approach behaviors toward novel stimuli in neutral environments. |
| Databáze: | OpenAIRE |
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