Final answer:
Positive thoughts about oneself are not part of the negative triad that triggers depression. The negative triad includes negative self-assessment, a negative outlook on the world, and a pessimistic view of the future.
Step-by-step explanation:
The negative triad is a concept in cognitive theory that pertains to three kinds of negative thoughts that are believed to contribute to depression. Among the options you provided, positive thoughts about oneself is not part of the negative triad that may trigger depression. The negative triad includes negative thoughts about oneself, such as feelings of worthlessness or inadequacy; negative thoughts about the world, such as a belief that the environment is unfriendly or overwhelming; and negative thoughts about the future, such as a sense that nothing will get better. Positive thoughts about oneself would actually be contradictory to the concept of the negative triad.