Chapter 5 Learning Goals (keep the following questions in mind as you read the chapter)
Recognize the difference between a conceptual variable and its operationalization.
List three ways psychologists typically operationalize variables: self-report, observational, and physiological.
Classify measurement scales as categorical or quantitative; further classify quantitative variables as ratio, interval, and ordinal.
Describe the difference between the validity and the reliability of a measure.
Identify three types of reliability (test-retest, interrater, and internal), and explain when each type is relevant.
Define “operational definition” of a variable. Give at least two operational definitions of the variables you thought of in the previous review question.
Distinguish among positive linear, negative linear, and curvilinear relationships.
What is the difference between the nonexperimental method and the experimental method?
