Answer:
Self-serving bias
Explanation:
Self-serving bias is an attitude of people in which people will take the credit of positive things for themselves and attribute the negative events to the external factor in the environment. But in the case of depression attribution to negative and positive events gets flipped.
Thus here in the above statement, Tori did well in her exam. She attributed her success in an exam to herself but on the other hand if she gets failed she will attribute the negative event to the external factors.