HLTHAGE 2A03 Lecture Notes - Lecture 5: Likert Scale, Validity, Content Validity

• School: McMaster University
• Department: Health, Aging and Society
• Course: HLTHAGE 2A03
• Professor: Jessica Gish

Document Summary

Level of measurement review:operationalizing education: no(cid:373)i(cid:374)al:what type of high school did you go to?a) all-boysb) all-girlsc) co-edd) i did not go to high school, o(cid:396)di(cid:374)al:what is (cid:455)ou(cid:396) highest le(cid:448)el of edu(cid:272)atio(cid:374)?a(cid:895) less tha(cid:374) high s(cid:272)hoolb(cid:895) high s(cid:272)hoolc(cid:895) University/colleged) post-graduate: ratio:ho(cid:449) (cid:373)a(cid:374)(cid:455) (cid:455)ea(cid:396)s of s(cid:272)hooli(cid:374)g have you completed?______ Step 1: select items for a composite index: assess fa(cid:272)e (cid:448)alidit(cid:455) (cid:894)so(cid:373)eti(cid:373)es (cid:272)alled (cid:862)logi(cid:272)al (cid:448)alidit(cid:455)(cid:863)(cid:895) a(cid:374)d (cid:272)o(cid:374)te(cid:374)t (cid:448)alidit(cid:455, assess fo(cid:396) u(cid:374)idi(cid:373)e(cid:374)sio(cid:374)alit(cid:455, co(cid:374)side(cid:396) (cid:448)a(cid:396)ia(cid:374)(cid:272) Step 2: assign scores for responses and consider weighting: dete(cid:396)(cid:373)i(cid:374)e desi(cid:396)a(cid:271)le (cid:396)a(cid:374)ge of i(cid:374)de(cid:454) s(cid:272)o(cid:396)es, dete(cid:396)(cid:373)i(cid:374)e (cid:449)hether items will be weighted equally or differently. Step 3: handle missing data: ide(cid:374)tif(cid:455) a st(cid:396)ateg(cid:455) to deal (cid:449)ith this p(cid:396)o(cid:271)le(cid:373) Step 4: validate the index and assess for reliability: i(cid:374)te(cid:396)(cid:374)al (cid:448)alidatio(cid:374, e(cid:454)te(cid:396)(cid:374)al (cid:448)alidatio(cid:374, relia(cid:271)ilit(cid:455) Scales: like a(cid:374) index is an ordinal, interval or ratio measure of a variable expressed as a numerical score, co(cid:373)(cid:373)o(cid:374) i(cid:374) situatio(cid:374)s (cid:449)he(cid:396)e (cid:449)e (cid:449)a(cid:374)t to (cid:373)easu(cid:396)e ho(cid:449) a(cid:374) i(cid:374)di(cid:448)idual feels o(cid:396) thi(cid:374)ks a(cid:271)out so(cid:373)ethi(cid:374)g.