PSYB01H3 Chapter 5-3: Chapter 5-3
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Selecting research participants: studying entire population, census, studying sample of the population, sample. Define the population: cannot generalize findings from one population to another population, e. g. from china to canada, therefore must define population. Simple random sampling: generates numbers based on chance, the probability of selection in a true simple random sample is equal for each element. Combining questions in indexes and scales: single questions are prone to error due to idiosyncratic variation, occurs when indi(cid:448)iduals" (cid:396)espo(cid:374)ses (cid:448)a(cid:396)y (cid:271)e(cid:272)ause of thei(cid:396) (cid:396)ea(cid:272)tio(cid:374)s to pa(cid:396)ti(cid:272)ula(cid:396) (cid:449)o(cid:396)ds or ideas in the questions. Index: the sum or average of responses to a set of questions about a concept. Idea is that the idiosyncratic variation in response to particular questions will average out. Index will provide a more complete measure of the concept than any one of the component questions. Designing questionnaires: survey questions answered as a part of a questionnaire, questionnaire, the survey instrument containing the questions in a self administered survey.
