Research Methods in Developmental Psychology

Research Methods in Developmental Psychology - Research...

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Research Methods in Developmental Psychology I. Basic definitions A. Variables B. Independent variable: manipulated by experimenter C. Dependent variable: measured by experimenter D. Extraneous variables/confounds II. Research Methods A. Naturalistic observation B. Case studies C. Surveys/self-reports D. Correlations 1. No cause-effect relationships 2. Values can range from –1 to 1 3. Relationships can be positive, negative, or no relationship E. True experiments 1. Manipulate at least 1 IV 2. Have at least 2 groups 3. Randomly assign subjects to conditions 4. Control any extraneous variables F. Quasi-experiments 1. Popular in developmental 2. No random assignment to conditions 3. Otherwise just like a true experiment III. Measuring change over time A. Cross-sectional designs 1. Different age groups, one point in time 2. Problem with cohort effects 3. Doesn’t show individual development B. Longitudinal designs 1. One age group at multiple points of time 2. Results may be specific to your cohort 3. May lose your subjects—left with an unrepresentative sample at the end
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Unformatted text preview: 4. Expensive and time-consuming C. Sequential Designs 1. Combines best of cross-sectional and longitudinal studies 2. Different age groups, different points in time 3. Eliminates cohort effect STEPS: 1. Formulate a problem. Decide how to gather empirical data (choose a research method). Obtain empirical data. Analyze the data; evaluate the results. Communicate your results. A definition that you can test…that you can assign a number or value to. Example: Pain rating scale from 1-10, IQ tests, an inventory that measures symptoms of obsessive-compulsive disorder Hypothesis—tentative explanation or prediction about something. What we usually start with; what we test through research. Leads to theories. Theories—a set of formal statements that explains how and why certain events are related to each other. Can lead to more hypotheses....
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  • Spring '13
  • JohnRoop
  • Developmental Psychology, different age groups, C. Sequential Designs, D. Extraneous variables/confounds, A. Cross-sectional designs

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