In the field of clinical psychology, understanding the various forms and symptoms associated with schizophrenia is crucial for effective diagnosis and treatment.
The Diagnostic and Statistical Manual of Mental Disorders (DSM-5) outlines specific criteria that must be met for a diagnosis of schizophrenia, including the need to display at least two of the principal symptoms consistently for a significant portion of a one-month period. Among these symptoms are delusions, hallucinations, disorganized thinking, and negative symptoms.
Given this context, which of the following symptoms is NOT considered one of the primary symptoms of schizophrenia according to the DSM-5?