4PPE3003 Jan. 25

4PPE3003 Jan. 25 - PPE3003 1/25/08 Chapter 4 (part...

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PPE3003 1/25/08 Chapter 4 (part 2)— Measurement issues in Trait Psychology I. Measurement issues a. Assumption i. People differ on traits b. Trait approach relies on self-reports i. Key measurement issue: 1. determining how much of a trait a person has c. trait psychologists must address things that affect ____ of trait measures i. accuracy ii. reliability iii. validity iv. utility d. carelessness i. Ex. 1. P rushes through and doesn’t pay attention ii. Detect using an infrequency scale 1. items (embedded among others) that most people answer the same way 2. Ex. a. I haven’t seen a car in 6 weeks T/F? iii. If participant answers differently than most equals carelessness iv. Duplicate items spaced far apart v. If participant answers same item differently = carelessness vi. Fatigue 1. survey is too long 2. participants get tired and stop caring 3. solutions a. give P’s a break b. counterbalance (reverse orders) c. keep it as brief as possible e. faking on questionnaires i. P’s try to appear better or worse than reality
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4PPE3003 Jan. 25 - PPE3003 1/25/08 Chapter 4 (part...

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