Psychology 2080A/B Lecture Notes - Lecture 2: Test Anxiety, English Alphabet, Mean Squared Error

• School: Western University
• Department: Psychology
• Course: Psychology 2080A/B
• Professor: Stelian Medianu

Document Summary

Lecture 1 part 2 norms and basic stats. True score: observed score, random error, mean, median, mode, range, variance, measurement scales. Interval scale: ratio scale, age-referenced norms, criterion-referenced norms. Types of statistics: descriptive statistics methods used to provide a concise description of a collection of qualitative information, purposes of description, summarize data and evaluate observations relative to others (observed within our samples, ex. I(cid:374) (cid:449)hat follo(cid:449)s, (cid:449)e"ll (cid:272)o(cid:374)side(cid:396) the effe(cid:272)ts of t(cid:449)o kinds of influence on ja(cid:373)ie"s pe(cid:396)fo(cid:396)(cid:373)a(cid:374)(cid:272)e systematic influences and random influences: t1, t2, etc. I(cid:374) ja(cid:373)ie"s (cid:272)ase, he(cid:396) e(cid:454)a(cid:373) s(cid:272)o(cid:396)e (cid:396)efle(cid:272)ts (cid:271)oth he(cid:396) t(cid:396)ue a(cid:271)ilit(cid:455) a(cid:374)d the i(cid:374)flue(cid:374)(cid:272)e of (cid:396)a(cid:374)do(cid:373) e(cid:448)e(cid:374)ts. Measures of variability: whenever we work with a mean, we must consider the variation of scores around that mean, example. Deviation scores (x - (cid:454) ) add up to 0. Not surprising if you recall mean is balance point. Distances above mean = distances below mean. + and values cancel each other out.