PSYB01H3 Lecture Notes - Lecture 5: Observational Error, Internal Validity
Document Summary
October 3, 2016 psyb01 lecture 5: measurement, reliability and validity: this (cid:449)as diffi(cid:272)ult for you to (cid:373)easure that (cid:271)e(cid:272)ause (cid:449)e (cid:449)ere(cid:374)"t gi(cid:448)e(cid:374) i(cid:374)stru(cid:272)tio(cid:374) of ho(cid:449) to measure the laugh, different people may have different criteria. What are some limitations of this type of assessment: even within the criteria, people seem to see differently, misses the point, for instance they want to measure how happy she is, but just because she. Inconsistent measurement because there is a lot of ambiguity. laughs it does not mean that she is happy. Reliability and validity: validity: looking at whether the measurement is accurate, reliability: is the study consistent if you were to do the study again, random vs systematic error is basically what distinguish the reliability with the validity. Reliability: systematic error is an error that (cid:272)a(cid:374) affe(cid:272)t e(cid:448)eryo(cid:374)e"s data, you (cid:272)a(cid:374)"t get rid of the error and you cannot differentiate between what is right and what is an error.
