Final answer:
The incorrect statement about delusional disorder is that 'Daily functioning is markedly impaired,' as delusional disorder does not typically impact a person's everyday functioning or behavior.
Step-by-step explanation:
The student has asked which of the following is not true of delusional disorder:
- It may involve nonbizarre delusions that could happen in real life.
- It may involve tactile hallucinations.
- The erotomanic type involves another person of higher social standing being in love with the patient.
- Daily functioning is markedly impaired.
- The person's behavior is not markedly odd or bizarre.
Answer: D. Daily functioning is markedly impaired is not true of delusional disorder. Whereas some severe mental illnesses, like schizophrenia, can significantly impact daily functioning due to symptoms like hallucinations and difficulty with social situations, delusional disorder by definition does not markedly impair daily functioning or general behavior. People with delusional disorder have persistent delusions but can maintain an otherwise normal life and do not exhibit the odd or bizarre behavior typically associated with other psychotic disorders.