GERO 300 Lecture Notes - Lecture 4: Inter-Rater Reliability, Test Anxiety, Criterion Validity

• School: Simon Fraser University
• Department: Gerontology
• Course: GERO 300
• Professor: Atiya Mahmood

Document Summary

Discuss the importance of operationalizing constructs in research, identifying the three broad categories into which research measures fall. Describe the differences between age, period and cohort effects, and discuss why it is so difficult to separate them. Define and differentiate reliability and validity of measurement. Describe the different types of reliability and validity assessments of instruments and identify the coefficients used and their meaning. Describe the problem of demand characteristics of research and reactivity in measuring human responses. Define and differentiate the various scales of measurement (nominal, ordinal, interval, ratio) and explain the types of statistical functions that can be used with each. The assignment of scores to individuals where the scores represent some characteristic of the individuals. Psychological measurement is often referred to as psychometrics. Measurement does not require any particular instruments or procedures it does require is some systematic procedure for assigning scores to individuals or objects so that those scores represent the characteristic of interest.