PSYC 201W Chapter Notes - Chapter 3: Psychometrics, Takers, Concurrent Validity

• School: Simon Fraser University
• Department: Psychology
• Course: PSYC 201W
• Professor: Matthew Sigal

Document Summary

Cognitive self-report (what people think about something) Affective self-report (how people feel about something) Behavioural self-report (how people act about/towards something: converging operations: using different kinds of measures to get at a result. Importance: determines the amount of information provided by a particular measure, determines the kinds of statistical analysis that can be performed on the data. Reliability: the consistency or dependability of a measuring technique. Observed score = true score + measurement error. True score: score that the participant would have obtained if the measure was perfect, and if it could be measured without error. Measurement error: deviation of participant observed score from their true score. Causes of measurement error: transient states (e. g. mood, health level, etc. , stable attributes (e. g. motivation, paranoia, etc. , situational factors (e. g. researcher"s attitude, room lightning, temperature, etc. , characteristics of measure (e. g. ambiguous questions, long tests, etc. , mistakes. Relationship between measurement error and reliability: reliability is inversely related to measurement error.