I remember a friend majoring in physics talking to me about theories one day. There was a time when physicists would make theories about what was "really" happening. These theories would like little stories about what the particles were actually doing.As long as the stories fit with observations, the stories got accepted.
Then someone made a story that said certain particles had a pilot element that intelligently guided them around to do what they had to do. His story fit with observation but it was patently ridiculous. Since then there has been a focus in physics on creating predictive equations without trying to add editorial about the true nature of the things being modelled. The focus was simply on creating predictive models.
I think this is the model I refer to above:
http://en.wikipedia.org/wiki/Pilot_wave