Final answer:
Schizophrenia is the psychological disorder with major disturbances in thought, perception, and behavior, involving symptoms like hallucinations and delusions, and is typically treated with antipsychotic medications.
Step-by-step explanation:
The psychological disorder characterized by major disturbances in thought, perception, and behavior is schizophrenia. Schizophrenia affects about 1% of the population in the United States and causes symptoms such as hallucinations, delusions, and disordered thinking, making it difficult for affected individuals to distinguish between reality and imagination.
Treatment typically involves antipsychotic medications that work by blocking dopamine receptors; however, these are not a cure, and most patients require long-term medication.