Research Methods in Devel. Psych

Research Methods in Devel. Psych - 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.” -- 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.”
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-- Sampling of a Population Random sampling vs. unbiased sampling I. Research *CANNOT infer cause-effect *No manipulation of variables –includes Naturalistic Observation, Case Studies, Survey/Self-Report, etc. --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) Correlation Coefficients have 2 parts: a. number , from 0.00 to 1.00 b. sign : positive or negative (neg. a.k.a. inverse)
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--Number indicates strength of the relationship: 0.00 - 0.29weak relationship 0.30 - 0.69moderate 0.70 - 1.00strong --Sign indicates direction of relationship: Positive means high X, high Y, etc. Negative means low X, high Y and vice versa II. Regression Analyses --statistical technique that examines the relationship between a dependent/ response variable and multiple independent / explanatory variables
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examined whether attachment of child to mother most affected by:
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Research Methods in Devel. Psych - RESEARCH IN...

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