REQUIRED TEXT: Experimental Methodology eighth edition by Larry B. Christensen, Allyn and Bacon, 2001 ISBN #0-205-30832-5 ------------------------------------------------------------ Chapter 2 Nonexperimental Quantitative Research: Accurate description of behavior without attempt at discerning cause and effect. Correlational Study; determine the degree of relationship between variables doesn't manipulate variables simply measures variables NOT cause-effect since a third variable may intervene and be related to both but be the actual cause of effect. A confounding variable may be actual cause. Ex Post Facto Study: Variables of interest are not subject of manipulation since they have already occurred. Participants assign themselves to groups e.g. gender, age, prior experience or internal state, e.g. depression in rape victims participants so self-selected may differ on other causal, extraneous, unknown variables. Longitudinal Study: single group measured over a long period of time. e.g. IQ begins to decrease at age 60. e.g. Louisville Twin study Individuals are always the same, so environment is controlled. Expensive, loss of participants due to death, moving or withdrawal from study. Cross-Sectional Study: samples of individuals at different, specific age levels and notes their changes on specific behavior. e.g. IQ begins to decrease at age 30. Age-cohort effect: different individuals in groups experience different environment. Naturalistic Observation: Unobtrusiveness of observer Lack of artificiality of the situation Time consuming Meta Analysis: Integrate and describe the results of a large number of studies on questions of complex behavior, e.g. psychotherapy, leadership, obesity. Survey: Collecting standardized information by interviewing a representative sample of a population. deceptively easy to use Methods: face to face telephone mail Questionnaire construction: Explicitly identified research question Open-ended vs closed-ended questions need raters for open-ended Question wording, no 'double-barreled' questions Unambiguous questions - pilot tested Question order positive & interesting questions first Avoid 'Yea-' or 'Nea-' saying Questionnaire length, 15 min limit Random sample vs Convenient sample of participants Qualitative Research: Data consists of words, pictures, clothing, documents, etc so interpretation is needed to extract meaning. - bias of preconceived notions Multimethod data collection: e.g.accounts of personal experience, introspective analysis (Psychology in the 1880's), an individual's life story, interviews, observations, photographs, historical documents, etc. Natural settings: Investigator's personal involvement and biases, e.g. joining a 'biker' group Experiences filtered through language, gender, social class, race, and ethnicity Lack of Controls! Phenomenology: Description of an individual's conscious experience, e.g. Wilhelm Wundt, Leipzig. Ethnography: description and interpretation of the culture of a group of people. 'Perfect Projection Opportunity' Case Study: in-depth description of an individual, organization or event; or theoretical explanation, Freud and Cocaine. ------------------------------------------------------------ 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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