PSYCO212 Chapter Notes - Chapter 9: Inter-Rater Reliability, Measuring Instrument, Face Validity
19 Mar 2016
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Done chapter 9: using statistics to answer questions. No t e b o o k: research design. Significant: those instances in which the statistical results are more likely to have been caused by manipulation of the independent variable. Descriptive statistics: procedures used to summarize a set of data. Inferential statistics: procedures used to analyze data after an experiment is completed to determine whether the independent variable has a significant effect. Reliability can be assessed through the following means: Test-retest reliability: the consistency in results every time a measure is used. To evaluate, measure the same set of participants at least twice. If r is positive and 0. 5 or above, there is good test-retest reliability. If r is positive but weak, participants test scores changed. Interrater reliability: the degree to which two or more observers agree in their ratings of a set of targets. To evaluate, two observers should rate the same participants at the same time.
