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Relationships Among Pre-Post Designs
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Pre-Post Designs l Randomized experiment (R) l Nonequivalent group design (N) l Regression-Discontinuity design (C) OXOOOOXOOOO
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The Main Issue l Selection threats l Are the groups similar before the treatment? l Related to assignment method in each design
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Assignment Method Probability of Assignment to Treatment Given the Pretest 1.0.5 0 Pretest
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Assignment Method Probability of Assignment to Treatment Given the Pretest 1.0.5 0 RE Pretest
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Assignment Method Probability of Assignment to Treatment Given the Pretest 1.0.5 0 RE RD Pretest
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Assignment Method Probability of Assignment to Treatment Given the Pretest 1.0.5 0 RE RD NEGD Pretest
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Assignment Method Probability of Assignment to Treatment Given the Pretest 1.0.5 0 RE RD NEGD Pretest
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Pretest Equivalence Equivalent Maximally nonequivalent
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Pretest Equivalence Equivalent Maximally nonequivalent RE
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Pretest Equivalence Equivalent Maximally nonequivalent RDRE
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Pretest Equivalence Equivalent Maximally nonequivalent RDNEGDRE
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Assignment Rule Known 4 4 Regression-Discontinuity Randomized Experiment Nonequivalent Group Design
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