Question

Every time bella starts getting anxious about speaking in public, she starts thinking things like, "oh god, i'm going to stutter and then everyone will laugh at me" and "i'll probably trip up and accidentally use a four-letter word while reading my notes." her therapist has urged her to silently shout "stop!" to herself when these intrusive thoughts start agitating her. this cognitive technique is known as

Answer 1

I believe the answer is: Thought stopping

Thought stopping refers to a therapy technique that is aimed to remove problematic thought that might be the source of the patient's psychological problem.
In the scenario above, this problematic thought came from the falsehood which make bella believed she would always got laughed at and causing the anxiety problem toward her