PSY 199 Lecture Notes - Lecture 1: Predictive Validity, Statistical Conclusion Validity, Psycinfo
17 Feb 2015
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Reliability: represents the consistency across replications under the same conditions. Reliability: test-retest reliability, give test at 2 separate points at see result. Inter-rater reliability (a. k. a. scorer consistency: two scorers looking at a situation and coding it. Good score depends on what you are looking at. Reliability: alternate form reliability, it refers to the general agreement between multiple items (generally likert scales) that make up a composite score of a given construct. Seeing if your answer to the question correlates with one another. Wording is very important: loftus, car experiments, baseball and soccer example, if 2 sets of responses are not too different, alternative-forms reliability is established. Validity: the extent to which a test measures what it is designed to measure, can have reliability without validity and visa versa, global picture- look at the big picture (representative of population, old conception vs new conception. 3 overarching types: content validity, construct validity, criterion- related. Evidence based on relations with other variables: 5.
