PSY 3307 Final: Psychometrics Final Review.docx
Document Summary
Is estimated: refers to the degree to which test scores are free from errors of measurement, does not imply validity ex. 3 measures of reliability: test-retest a multiadministration method, is time-related, it is used to assess the consistency of a measure from one time to another. Administering the same test to the same sample on two different occasions. It assumes that there is no substantial change in the construct being measured between the two occasions uses pearson"s r coefficient. Is based on your theory of whether you expect your construct and measure to stay the same ex. There is a difference between mood and iq because you"d expect iq to stay the same for months but you"d expect one"s mood to change and vary from day to day. Is the variation in measurements taken by a single person or instrument on the same item under the same conditions and includes intra-rater reliability.
