PSYB01H3 Chapter 5: PSYB01 Chapter 5 textbook notes
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the most common measurement strategy is to ask people to tell you about themselves. How many mistakes did someone make on a task. psychological and neurological responses can be measured as well. in this chapter we need to consider the technical aspects of measurement: reliability, validity, and reactivity of measures. reliability refers to the consistency or stability of a measure of behaviour. a reliable test would yield the same results each time when given to the same person. a reliable measurement doesn"t fluctuate from one reading to the next. If there is fluctuations in readings then there is an error in the measurement device. every measurement has two components: a true score: the real score on the variable, a measurement error. an unreliable measure contains considerable measurement error; an unreliable measure contains little measurement error (it"ll yield an identical, or nearly identical, score each time the same person is measured)
