Explaining misattribution

In explaining the attributional error researchers have to explain subjectsʹ negative behavior. They tend to explain it in internal dispositional terms of personal need or ego weakness. But even if they explain it in situational terms, it remains questionable to what extent they themselves make an attributional error. Are they liable to the self-excepting fallacy, or are they forced to avoid a choice between situational and dispositional terms in explaining misattribution? This problem definitely has certain consequences for the evaluation of the explanatory power of attribution theory as a theory.