Which term refers to repetitive thoughts or responses?

• A. Perseveration
• B. Obsessions
• C. Derailment
• D. Blocking

Answer: (A)

Perseveration is the repetition of a thought or behavior beyond its usefulness, reflecting difficulty switching to a new topic or response. It shows up when someone keeps giving the same answer or fixates on the same idea even after the situation has changed or guidance has been given. This is distinct from obsessions, which are intrusive, distressing thoughts the person tries to resist, rather than simply repeating a response. Derailment involves loose connections in thinking that lead to unrelated topics, not repetitive fixation. Blocking is a temporary inability to recall a memory. The hallmark here is the persistent repetition, which makes perseveration the best fit.