“Empiricism was important for positivism “ seems a better translation and closer to the Greek?
Empiricism is "εμπειρισμός" which is a philosophical term and not just εμπειρία=experience.
Many thanks Troll, glad to have that correction. I was misled by the fact that it was in the Philosophy module. I should have twigged that εμπειρία has no Ισμος as an ending.