PSYC 2018H Lecture Notes - Lecture 5: Face Validity, Discriminant
16 Nov 2018
School
Department
Course
Professor
Document Summary
How do we know when a measure is good : reliability. The extent to which measures of the same phenomenon are consistent and repeatable; measures high in reliability contain a minimum of measurement error (g & g, 2013, p. 500). If a measure is not reliable, it is difficult to know what a score on the measure actually means. Reliability is necessary, but not sufficient in order to have a good measure: validity. In general, the extent to which a measure of x truly measures x and not y (e. g. , a valid measure of intelligence measures intelligence and not something else (g & g, 2013, p. 502). Different types of validity: content, face", criterion, construct, convergent, and discriminant. Content validity: whether or not the actual content of the items on a test makes sense in terms of the construct being measured (g & g, 2013, p. 119).
