PSYB01H3 Lecture : CHAPTER 9.docx

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22 Apr 2012
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Samples may be drawn from the population using probability sampling or nonprobability sampling techniques. Probability sampling used when it is important to accurately describe the population (i. e. conducting scientific polls) Nonprobability haphazard or convenience sampling methods used when studying the relationships between eh variables and testing prediction derived from theories of behaviour. Sample size also important larger sample = results statistically sig. To manipulate independent variable you have to construct an operational definition of variable. Must turn a conceptual variable into a set of operations; specific instruction, events, and stimuli to be presented to the research participants. Independent and dependent variables must be introduced within the context of the total experimental setting aka. Provide the participants with the informed consent information needed for study. Explain to participants whey experiment is being conducted. If deception is necessary, you must address eh deception during the debrief. Can manipulate by presenting written, verbal, or visual material to participant.

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