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Relationships Among Pre-Post Designs

Relationships Among Pre-Post Designs. Pre-Post Designs. O X O O O. Randomized experiment (R) Nonequivalent group design (N) Regression-Discontinuity design (C). The Main Issue. Selection threats Are the groups similar before the treatment?

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Relationships Among Pre-Post Designs

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  1. Relationships Among Pre-Post Designs

  2. Pre-Post Designs O X O O O • Randomized experiment (R) • Nonequivalent group design (N) • Regression-Discontinuity design (C)

  3. The Main Issue • Selection threats • Are the groups similar before the treatment? • Related to assignment method in each design

  4. Assignment Method Probability of Assignment to Treatment Given the Pretest 1.0 .5 0 Pretest

  5. Assignment Method Probability of Assignment to Treatment Given the Pretest 1.0 RE .5 0 Pretest

  6. Assignment Method Probability of Assignment to Treatment Given the Pretest 1.0 RE .5 RD 0 Pretest

  7. Assignment Method Probability of Assignment to Treatment Given the Pretest 1.0 RE .5 NEGD RD 0 Pretest

  8. Assignment Method Probability of Assignment to Treatment Given the Pretest 1.0 RE .5 NEGD RD 0 Pretest

  9. Pretest Equivalence Maximally nonequivalent Equivalent

  10. Pretest Equivalence RE Maximally nonequivalent Equivalent

  11. Pretest Equivalence RD RE Maximally nonequivalent Equivalent

  12. Pretest Equivalence RD NEGD RE Maximally nonequivalent Equivalent

  13. Assignment Rule Known Randomized Experiment Nonequivalent Group Design Regression-Discontinuity

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