Correct me if I'm wrong, but the SPR is just a linear model, right? Statistics is an under appreciated field in many walks of life. My own field of speciality, experimental design, is treated with down right suspicion by scientists who have not encountered it before, who find the results counter-intuitive (when they have 4 controllable variables in an experiment they want to vary them one at a time, while the best way is to vary all 4 simultaneously...)