PSYCH257 Lecture Notes - Lecture 3: Thematic Apperception Test, Inter-Rater Reliability, Concurrent Validity

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To know what type of medication, prognosis, course of ailments, what type of disorder needed: characteristics of assessment tools. What the test measures and how well it does so. Standards and norms help ensure consistency in the use of a technique. Reliability is the consistency of a test. Two main types: test retest reliability retest of the certain disorder the next months later. Interrater reliability e. g. : a student not convinced with a psychologists" method, then went to another psychologist because not convinced but the other psychologist has different diagnosis low interrater reliability. The instrument itself even though used by the same psychologists, could give different diagnosis. Validity is the accuracy of a test"s results. A good test must accurately measure what it is supposed to be measuring. Some types of validity: predictive validity how well your assessment tells you what will happen in the future e. g. : gre"s predict performance of students going to graduate schools.

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