The tendency to overemphasize the importance of personality factors when explaining someone else's behaviors while overemphasizing situational factors when explaining your own behaviors is called the

Fundamental attribution error.

Explanation:

According to research, this can be tagged to be a type of cognitive bias in the social psychology world. This term was been said to have been brought about by Lee Ross after which it was experimentally modified by Jones and Harris. It is said that Ross explained it to be the conceptual bedrock for social psychological field. This is because it tends to see others as internally motivated, making them totally responsible for their behavior. This is easily seen to possibly be because of perceptual salience, and this could probably be because of lack of information about the other said person involved.