PSY 250 Lecture Notes - Lecture 5: Construct Validity, Smoking Cessation, Personality Test
30 Sep 2016
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Lecture outline: experimental design, between subjects design, experimental group, control group, posttest only, pretest-posttest, within subjects design, repeated measures. Remember these concepts: hypothesis, independent variable (iv, dependent variable (dv, reliability, validity. Reliability: the consistency (stability) of a measure of behavior, measurement error, people, device, variability, interrater reliability. The degree to which a measurement device (or procedure) accurately measures the phenomenon it was designed to measure. Construct validity: thermometers don"t measure luminance, speedometers don"t measure height, iq tests don"t measure agreeableness. , personality tests don"t measure memory capacity. Experiments: a way to a infer causal relationship between variables, manipulations of the iv causes , changes in the dv. 9/28/2016: manipulations of the iv causes , changes in the dv, a valid way to test alternative explanations, internal (construct) validity. Experiments: creative solutions, many times novel, with precedent, different resources, researchers, budgets, samples, parsimonious, elegant .
