In which type of attribution error do people tend to attribute their successes to internal characteristics?

The answer is "internal attribution".

An internal attribution which is otherwise called a dispositional attribution; it is when an individual uses an individual and personal reason as the reason for a circumstance or occasion rather than an external attribution. For instance, a man gets an awful review on a test. They question themselves regarding why they got such a terrible review instead of blaming other factors.

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- jack watson