PSYB01H3 Chapter Notes - Chapter 5: Inter-Rater Reliability, Face Validity, Personality Test
Document Summary
Systematic and detailed research on reliability and research is mostly done with self- reports. Knowing concepts of reliability and validity lets you evaluate quality of existing measures and chose operational de nitions you create: use pre-existing measures and not own bc they"re reliable and backed up with valid data to dimensions. Reliability of measures: reliability: the consistency/stability of a measure of b. This is the rst step to a good a reliable measure (eg. intelligence) yields same results every time it"s tested. Uctuation in measures = error in measurement device: true score and measurement error = 2 concepts to understanding reliability operational de nition, true score: person"s real score, measurement error: reducing error/variability = reduces uncertainty = increase. Test-retest reliability: you measure the same individual at 2 points in time, calculate the r, which determines the relationship b/w the 2 tests. If positive, the measure re ects true score, not measurement error o: r > 0. 80 reliability.
