PSY 290A Lecture Notes - Lecture 10: Criterion Validity, Blood Alcohol Content, Eye Color

• School: University of Arizona
• Department: Psychology Main
• Course: PSY 290A
• Professor: Dana Narter

Document Summary

Well-being (construct: 5-item scale (operationalization) --> self-report. # of smiles (operationalization) --> observational: brain scan (operationalization) --> biological. Categorical vs. quantitative: three kinds of quantitative: Ordinal (meaningful values but unequal intervals between units) Interval (equal intervals between units but no meaningful zero) Ratio (equal intervals and a meaningful zero) Reliability of measurement: three types of reliability, test-retest. Test-retest reliability: consistent scores every time we test. Internal: using a scatterplot to evaluate reliability, using the correlation coefficient r to evaluate reliability. Operationalization --> 5-item scale, # of smiles, brain scan. Ordinal - meaningful values but unequal intervals between units. Interval - equal intervals between units but no meaningful zero. Ratio - equal intervals and a meaningful zero. Test-retest - people get consistent scores every time they take the test. Interrater - two coders" ratings of a set of targets are consistent with each other. Internal - people give consistent scores on every item of a questionnaire.