I believe the answer is Pupils narrow
When people are confronted with stressful situations, our pupils will dilated, not narrowed.
When this happen, our body will enter a fight-or-flight situation, which would be determine on our personal assessment towards whether we could handle the outcome of the situation.
Answer: the theory is called disengagement
Explanation:
Disengagement is the process whereby individuals detach their sense of self-worth from the outcomes they receive in a given domain.