One form of +/- that I didn’t mention in my Advanced Stats Primer (but which will be included in a future update) is statistical +/- (SPM). I know, you’re thinking, isn’t +/- already “statistical”? Yes, but in the land of jargon, even jargon begets its own jargon. SPM essentially is a model created by regressing simple or advanced box score stats (see and for current examples) onto some form of adjusted +/- (APM or RAPM).
In the past I looked into the , and found that the results were statistically significant and fairly high (
