PSYB32H3 Chapter Notes - Chapter 4: Cerebral Palsy, Personal Development, Electrical Resistance And Conductance
25 Oct 2013
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Reliability refers to the consistency of measurement. The higher the correlation, the better the reliability. Inter-rater reliability: the degree to which two independent observers or judges agree. Test-retest reliability: the extent to which people being observed twice are taking the same test twice, perhaps several weeks or months apart, score in generally the same way. An example of a situation in which this type of reliability makes sense is in evaluating intelligence tests. Alternate-form reliability: the extent to which scores on two forms of the test are consistent. Sometimes, psychologists use two forms of a test rather than giving the same test twice, perhaps when there is a concern to people will remember their answers from the first test. Internal consistency reliability: determines whether the items on the test are related to one another. In an anxiety questionnaire containing 20 items, we would expect items to be interrelated, or to correlate with one another, if they truly tap anxiety.
