Research Meth. in Devel. Psych (studfull)

Research Meth. in Devel. Psych (studfull) - RESEARCH IN...

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RESEARCH IN DEVELOPMENTAL PSYCHOLOGY *All Research entails : -- Theory : an overarching set of assumptions & explanations which helps to guide research e.g., Psychoanalytic theory; Theory of Natural Selection -- Hypothesis : a testable prediction Two-tailed : “Breast-fed infants will differ from formula-fed infants on frequency of ear infections." One-tailed : “Breast-fed infants will have fewer ear infections than formula-fed infants.” Can predict direction. Better because need .05 statistically. -- Operational Definitions : measurable behaviors used, for the purposes of that experiment, to define some concept/variable e.g.,“Intelligence is what an I.Q. test measures.” -- Sampling of a Population Random sampling vs. unbiased sampling Representational sample (If there are 50% of females in the population… you want that in your study. If 10% are Hispanic… you want that in your study) I. *CANNOT infer cause-effect *No manipulation of variables –includes Naturalistic Observation, Case Studies, Survey/Self- Report, etc.
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--Correlational Research assesses the relationship between two (or more) variables, based either on an active study, or archival material (e.g., the U.S. Census)
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Correlation Coefficients have 2 parts: a. number , from 0.00 to 1.00 b. sign : positive or negative (neg. a.k.a. inverse) --Number indicates strength of the relationship: 0.00 - 0.29 weak relationship 0.30 - 0.69 moderate 0.70 - 1.00 strong --Sign indicates direction of
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This note was uploaded on 04/22/2009 for the course PSY 333M taught by Professor Reeves during the Spring '09 term at University of Texas.

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Research Meth. in Devel. Psych (studfull) - RESEARCH IN...

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