Internal Consistency: Do the items on a test measure the same thing? Index of internal consistency, average of split half correlations is made ( Cronbach's alpha).even numbered items) & participant's scores on the two halves are compared (allows for internal-consistency reliability). Split-Half: Test is divided into halves (or odd numbered items vs.Equivalent-Forms: Equivalent or parallel forms of a test are developed (ex: test forms A, B, C with different colors for an exam).O May lead to “test-wiseness” that influences their scores the second time or clients may show practice effects. Test-Retest: Consistency of responses to the same test stimuli on repeated occasions.Reliability-consistency with which individuals respond to test stimuli.Wilson Riles-California supreme court in 1975 placed a moratorium on using IQ tests on African-Americans. Binet-Simon test looked at individual differences in mental functioning (focus academic ability).Due to under-education, and to measure mental abilities, intellectual tests were developed.Intelligence Testing: Yesterday and Today
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