Here are four symptoms commonly associated with schizophrenia that are depicted in the movie, although they are not necessarily representative of the disease in all cases:
1. Hallucinations: John Nash experiences auditory hallucinations, primarily hearing voices that he believes are government agents. These voices give him instructions and threaten him, causing significant distress and impacting his behavior.
2. Delusions: John develops complex and elaborate delusions about working for the government, decoding secret messages, and being involved in a global conspiracy. He believes these delusions are real and acts upon them, even when they are demonstrably untrue.
3. Disorganized Thinking: John's speech and thought patterns become increasingly fragmented and illogical. He jumps between topics, uses nonsensical words, and struggles to maintain a coherent train of thought.
4. Social Withdrawal: As his illness progresses, John withdraws from social interactions and becomes increasingly isolated. He struggles to connect with others and experiences paranoia and distrust.
Remember, schizophrenia is a complex mental illness with a wide range of symptoms that vary greatly from person to person. It's crucial to avoid relying on fictional depictions for information about the illness.