Question: Why does a project manager have to play psychologist? 

Answer: You have to play psychologist because that's your job...  The success of the project ultimately comes down to one person, the project manager, but that hardly seems fair because any number of people are working on that project.  In theory, happy people are more productive right?  And you want to get the most out of everyone who is working with you right? You don't have to be one, just learn to play the role.
This question from the Yahoo Q&A forum is categorized in the topic: Politics & Government