Depends on what type of psych you're looking at

That's exactly my point... Psych is a huge field that encompases so many things. Thinking it's just about the social personality stuff is like thinking physics is only about gravity.
As per my other comment some people in psych study the brain areas involved with reach movements (this is actually a very popular topic), some people try to model the eye, some people look stereoscopic vision, a person I know looks at localization of "up" (gravity), another person looks at hand grip positioning. All of these topics have concrete questions where you can develop and test falsifiable hypothesizes with stats.