PSYC 310 Lecture Notes - Lecture 3: Concurrent Validity, Predictive Validity, Sleep Deprivation
14 Feb 2017
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Directly observable: height, weight, something you can see. Inferred states: how you feel, stressed, moods, anger. Source of error: measurement error, scales that aren"t calibrated. Presumed unobservable internal mechanisms that account for externally observed behaviour. Anxiety - i"m not in your mind, you"re not in mine. Not sure if you perceive it the same way. We give you a test, says it"s so easy and a 5th grader can do it. In order to work with a construct, you have to learn how to measure it so everyone know"s what you"re talking about. Construct is the name of your independent variable: sleep deprivation. Sleep deprivation a ected people"s performance on math tests. Important to operational de ne so people can agree on something and vary on it. And when you will measure it (testing protocol) De nes the operations that allow us to con dently link the unobservable construct with the observable behaviour.
