PSYCH-220 Lecture Notes - Lecture 3: Psych, Psychopathy, Narcissism
9 Oct 2020
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Measurements that reflect what you are trying to assess and are not affected by. The tendency of a measurement instrument to provide the same comparative. Measurement error: the cumulative effect of extraneous influences. The influences that are considered extraneous depend on what is being measured are states (things that are temporary) versus traits (characters of you, stable overtime) information overtime. Low precision of measurement- measurements should be taken as exactly and carefully as possible. Participant- could show up ill, short on sleep. Be careful and double check all measurements. Use a constant, scripted procedure for all participants. Measure something that is rather important than trivial. Degree to which a measurement actually reflects what one thinks or hopes it does. Reliability is necessary but not sufficient for validity. Reliability and validity are both part of this broader concept. Generalizability over participants- do the participants that were chose represent the. Gender bias- females are more likely to sign up than males.
