PSYCH 2300 Chapter Notes - Chapter 5: Discriminant, Content Validity, Criterion Validity
19 Aug 2016
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Chapter 5: ways to measure variables, more about conceptual and operational variables. Start by stating definition of construct then create operational definition: three common types of measures. A method of measuring a variable in which people answer questions about themselves in a questionnaire or interview. Helpful on research on children (parent reports or teacher reports) A method of measuring a variable by recording observable behaviors or physical traces of behaviors. A method of measuring a variable by recording biological. B. 3. c. emg: electronically records tiny movements of face muscles. B. 3. d. fmri: record and code relative change in blood flow in particular regions of brain. Single construct can be operationalized in many ways: scales of measurement. All variables must have at least two levels. A variable whose levels are categories (also called nominal variable) Sex; species; can assign number (no numerical meaning) A variable whose values can be recorded as meaningful numbers.
