One of the most common questions faced by psychologists is answered on video by 11 year old Professor Henry A. Waldorf while he skillfully plays the cello and wears a hat.
Bravo Professor Waldorf! I look forward to your forthcoming presentations to the Royal Society.
Link to ‘Is psychology a science?’ on YouTube.
Mind Hacks 
Professor Waldorf is a genuis!
Funnily enough I was reading about this topic at the badscience.net forum just the other day. http://badscience.net/forum/viewtopic.php?t=69
Of course, I had to look up ‘nomothetic’
“relating to or involving the search for abstract universal principles ”