When answers are coded as integers from 0 (never) to 6 (always), the following formulas calculate the weighted averages of factor items, taking items with negative phrasing into account. PER = (0.669*SI1 + 0.518*SI2 + 0.550*SI3 + 0.664*SI4)/(0.669+0.518+0.550+0.664) ATT = (0.720*SI5 + 0.583*SI6 + 0.605*SI7 + 0.473*SI8)/(0.720+0.583+0.605+0.473) ATD = (0.554*(6-SI9) + 0.599*SI10 + 0.521*(6-SI11) + 0.781*(6-SI12))/(0.554+0.599+0.521+0.781) DIS = (0.708*SI13 + 0.708*SI14 + 0.656*SI15 + 0.631*SI16)/(0.708+0.708+0.656+0.631) REF = (0.549*SI17 + 0.532*SI18 + 0.475*SI19 + 0.740*SI20)/(0.549+0.532+0.475+0.740) WIS = (0.520*SI21 + 0.563*SI22 + 0.449*SI23 + 0.626*SI24)/(0.520+0.563+0.449+0.626) ENG = (0.689*SI25 + 0.624*SI26 + 0.769*SI27 + 0.690*SI28)/(0.689+0.624+0.769+0.690) EFF = (0.494*SI29 + 0.666*(6-SI30) + 0.473*SI31 + 0.720*SI32)/(0.494+0.666+0.473+0.720)