PSY 226 Chapter 7: Chapter 7 PSY 226_
16 Dec 2022
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Reliability: the consistency, or degree of accuracy, of a measuring instrument. Validity: the degree to which a test actually measures what it is intended to measure. Projective tests: a test consisting of ambiguous stimuli, to which an individual produces spontaneous responses; scoring is often subjective. The physician galen proposed only a fourfold classificatory system based on. Hippocrates"s doctrine of the four basic humors of the body: black bile, yellow bile, phlegm and blood. There are two critical features of a measure that determine its quality: reliability and validity. Reliability refers to the consistency or measurement error of the measuring instrument. A test of introversion that yielded very different scores for a sample of individuals every time they were tested would have low reliability and would not be very useful. Validity refers to the degree to which a measure actually assesses what it is intended to assess.
