Which term describes loss of train of thought?

• A. Blocking
• B. Phobia
• C. Overvalued Idea
• D. Paranoid Ideation

Answer: (A)

Blocking is a sudden interruption in the flow of thought or speech, where the speaker stops abruptly and cannot immediately resume the train of thought. This reflects a disturbance in thought form rather than fear or belief content. Phobia refers to an intense, irrational fear of a specific object or situation. An overvalued idea is a strongly held belief that is not fully delusional but is given excessive importance. Paranoid ideation involves suspicious or persecutory beliefs about others. In clinical assessment, blocking helps identify a disruption in thinking processes rather than anxiety or delusional content.