negative symptom | definition

characterized by decreases and absences in certain normal behaviors, emotions, or drives, such as an expressionless face, lack of motivation to engage in activities, reduced speech, lack of social engagement, and inability to experience pleasure


Source:

Spielman, R. M., Jenkins, W. J., & Lovett, M. D. (2020). Psychology 2e. Houston, Texas: OpenStax. Access for free at https://openstax.org/details/books/psychology-2e

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