PSYC 217 Chapter 5: C&R Chapter 5.docx
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Test retest reliability: a) twice and then measure the correlation coefficient (relationship between the two) to determine how similar they are (how high the positive number is). is when you use the same test: for it to be reliable has to be at least . 80, sometimes this is not an appropriate measure e. g. for mood, it changes quite easily. Validity tells us weather our measure is actually measuring what we want it to be measuring: describe how a researcher can build a case for construct validity, including predictive validity, concurrent validity, convergent validity, and discriminant validity, construct validity: well the operational definition reflects the theoretical definition of the variable. Important so that the psychopathy checklist isn"t accidentally measuring schizophrenia tendencies. the degree to which results from one test: discriminant validity, describe the problem of reactivity of a measure of behavior and discuss ways to minimize reactivity, reactivity, to avoid reactivity you can:
