PSYCH339 Lecture Notes - Lecture 4: Level Of Measurement, Job Performance, Unobservable
2 Oct 2017
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Document Summary
Using data to make decisions about people and as a way to help organizations meet their goals. How much of the variance in a is accounted for by the variance in b. We use a variety of predictors usually measuring some construct such as intelligence or persistence and use that to predict job performance. How much variance in one variable is shared with variance in another. Rank ordering of one variable shares the rank ordering of the other i. e. measuring you on one predictor, rank everyone who took that test, and pick people at the top of each list. If we have a hypothesis that height predicts performance in basketball: requires measurement of both height and basketball performance, use correlation correlate some measure of height with some measure of bball performance. So 2. 5% of scores are less than 70. Most psychological constructs are measured using interval scales: no true zero point, cannot have ratios/fractions unless we have a true zero.
