PSYCH339 Lecture Notes - Lecture 4: Performance Appraisal, Discriminant Validity, Criterion Validity
10 Aug 2016
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Sheldon has a higher iq than 99. 99% of other people. So sheldon"s true iq is probably between about 177. 5 (187 9. 5) and 196. 5 (187 + As a reliability gets higher, the 95% confidence interval goes down to the point where you get to a perfect reliable test, there is no error so the true score is the observe score. Construct validity: convergent validity, divergent validity. What you do is observe a behaviour and make an inference that they possess an underlying behaviour. Lets say we want to measure general mental ability (gma) Gma is assumed to cause you to get an item right or wrong. Dissimilar constructs should no be correlated: divergent validity. Ex: openness and math skills not highly correlated and it shouldn"t be. If it was correlated and there would be a problem and there would not be divergent validity. Personnel selection: does gma predict job performance.
