VARIABLES. Concepts that are operationalized (things that vary). Because things vary, research is conducted. How or why things vary How differences in one variable are related to another. Types of Variables. INDEPENDENT/DEPENDENT CRITERION/OUTCOME DICHOTOMOUS ATTRIBUTE/ACTIVE EXTRANEOUS
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Concepts that are operationalized
(things that vary)
independent variable changes in the dependent variable
e.g., male, female
Variables which have an unwanted or irrelevant effect on the dependent variable under investigation. The kind of independent variable which may unexpectedly alter the results of the study
eg. If gender or age is thought to be a confounding factor use all one gender or all one age cohort as subjects, thus eliminating this as a factor