PSY 370 Lecture Notes - Lecture 41: Psy
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When we are making a yes/no decision about people, we need to choose a cut score. *what you care about most is how you decide where to set your cut score. "how many of these items should a person endorse to be classified as severely depressed" Order the items by difficulty (based on pilot test) Ask experts to identify the item that represents the dividing line between yes and no. "anybody who doesn"t endorse at least these items probably shouldn"t pass" If you have criterion data, you can choose the cut score that minimizes errors. ***the better the correlation between the test result and the actual result, the better your decision will be. *the number of errors you make is directly affected by the validity coefficient (correlation) What proportion of people would be successful in the opportunity we are selecting for, even if we don"t use the test.
