PSYB01H3 Chapter Notes - Chapter 4, 5: Predictive Validity, Face Validity, Inter-Rater Reliability
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Construct validity: whether methods of studying variables are accurate: adequacy of the operational definition of variables. Internal validity: accuracy of conclusions about cause and effect: study has high internal validity when inferences can be made that one variable caused changes in the other variable, three elements required: Elimination of plausible alternative explanations for the observed relationship. External validity: extent to which the results can be generalized to other populations and settings. Variable: any event, situation, behavior, or individual characteristic that varies: must have two or more levels of values, operational definition: set of procedures used to measure or manipulate a variable. Variable must have an operational definition to be measured empirically. Forces scientists to discuss abstract concepts in concrete terms. Help researchers communicate their ideas with others. Unrelated variables vary independently of one another. Correlation coefficient (r): numerical index of the strength of relationship between variables.
