PSYC 334 Chapter Notes -Item Response Theory, Preference Test, Internal Consistency
31 Jan 2014
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The problem of bias in psychological assessment. Mean difference of 1 sd in iq between black and white students. Drops to . 5 . 7 when ses is controlled for. Flawed psychometric methodology, not actual differences. Bias: systematic error in a test score. Native americans tend to perform worse at verbal tasks than white americans. Both hispanic and native americans are better at visual- spatial tasks relative to verbal tasks. Most common explanations: genetic, environmental (e. g. , ses, education, culture, interaction between genes and environment, defective tests. For example, most tests that we use are based on white, western, middle- class knowledge and values. Fairness: moral, philosophical, or legal issue on. Bias: statistical property of a test. which reasonable people can disagree. Determined through principles, opinion, Determined empirically (through discrepancies in data) and debate. Distinguish between bias and offensiveness. Minority panel to review offensiveness. Hard to find biased items on gross inspection. Test bias and inappropriate administration or use.
