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Feb 4 2013.doc

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PSYO 2090
Tim Jukes

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PSYO2090: DevelopmentathPsychology February 4 2013 Dr. Juckes Experimental Design • Uses independent and dependent variables • Strongest for causality • Random assignment of subject Within Subject Design • Multiple measurements of the same subject going through different varriables Example: Time Manipulation Between Subject Design • Compare two or more groups with each group having different levels (or types) of the same variables. • Although there is random assignment, groups might be matched based on demographic. Psychophysical Methods Since children may not be able to talk or may not have the vocabulary to communicate properly, we must look into pre-verbal and non-verbal ways to test their reactions Preferential-looking Paradigm • David Teller, 1970 • Two sides of a visual display are set up with a viewing aperture between them • Each display would show different images • The idea was that whichever display the infant looked towards, the more interested the infant was in which ever image was being displayed • Originally, a researcher would sit behind the displays and look through a hole and record which way the infant was looking. • With new technological advances, we are able to be more precise, objective and accurate (TV and computer screens, eye tracking, etc) Habituation Paradigm (pg 52) • Children look longer at things that are novel/interesting (or
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