PSYC 2001 Lecture Notes - Lecture 5: Inter-Rater Reliability, Level Of Measurement, Operationalization
15 Dec 2017
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Document Summary
How well a study"s variables are measured or manipulated. Any variable can be expressed in two ways: The researcher"s definition of the variable at a theoretical level: conceptual variable (construct): , operational variable: . To measure the association between wealth & happiness, researchers must measure both constructs. They might operationally define wealth by asking for bank account balances or observing cars. There are three types of measures to operationalize variables: self-report measure: . Operationalizes a variable by recording biological data (i. e. brain activity, hormone. Asking people how frequently they attend religious services. A researcher operationalize happiness by observing how many times a person smiles. Requires the use of equipment to record and analyze biological data. Moment-to-moment happiness has been measured using facial electromyography (emg) A way to electronically record tiny movements in the muscles in the face. It detects a happy facial expression; smiling shows muscle movement around eyes & cheeks. All variables must have at least two levels.
