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REQUIRED TEXT: Experimental Methodology eighth edition by Larry B. Christensen, Allyn and Bacon, 2001 ISBN #0-205-30832-5 ------------------------------------------------------------ Chapter 12 Data Collection Research Participants must be randomly selected from participant pool available, e.g. rats in lab, Introductory Psych students, dept pool, and randomly assigned to groups. Procedures of selection and assignment are reported in write up. How many Participants? Enough needed to detect an effect caused by IV. Power is probability of rejecting a false-null hypothesis. As sample size increases, cost in money and time increase. Determined by probability level (alpha), sample size, and effect size (magnitude of the relation between IV and DV expressed as the correlation between them and can be estimated from the literature.) Institutional Review Board (IRB): Informed Consent, see p. 319 Debriefing: true purpose of the experiment educational function of participating. determine effectiveness of IV participant has contributed to Psychology please do not discuss experiment with others Institutional Animal Care and Use Committee (IACUC): ------------------------------------------------------------ My office is in room 116C of HGH (826-4571) and I invite you to consult with me on any matter during my office hours or any time that is agreeable to you and me.Go back to the beginning
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