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Design_Wrap-up_and_Behavioral_Research

Design_Wrap-up_and_Behavioral_Research - Design Wrapup and...

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Design Wrap-up and  Behavioral Research
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Today Turn back to quasi-experimental design Goals: To highlight 3 additional quasi-experimental  methods Proxy-pretest Pattern Matching NEDV Regression point displacement Each is specific to a given kind of data
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Proxy-Pretest Most appropriate when the intervention  starts after the pretest!!! Example:  Interested in interventions that  maintain quality of life in demented elderly ALMOST NEVER HAVE PRE-DEMENTIA info
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Design N O1 X O2 N O1  O2 Looks like nonequivalent groups design but  one big difference! “pre-intervention” assessment is retrospective
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Two ways it can be retrospective #1:  Ask people to “think back” to what  happened to them earlier Disadvantages? Why would you want to even bother?
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Two ways it can be retrospective #2 use archival data that precedes  intervention E.g. medical records, school records Advantages?
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