"the problem is that they assume they can't take care of themselves, so they think others have to meet their needs. this pattern of thinking is not very in trying to deal with histrionic personality disorder." a psychologist from which perspective would agree most strongly with this quote?

I believe the answer is: Cognitive

Cognitive psychologist tend to believe that the perception that people have would inherently become the basis of all of their other behaviours.

So, when a person perceive that he/she is incompetent and unable to do anything, all of that person's behaviour would be shape in a way to address that feeling of incompetency, in this case hoping others would always fulfill their needs.