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Experimental designs

Experimental designs. Between- / Within-subjects . Between-subjects design Each partcipant takes part in 1 experimental condition Analysis of differences between groups of participants from different conditions Within-subjects design Subjects take part in all conditions

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Experimental designs

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  1. Experimental designs

  2. Between- / Within-subjects • Between-subjects design • Each partcipant takes part in 1 experimental condition • Analysis of differences between groups of participants from different conditions • Within-subjects design • Subjects take part in all conditions • Analysis of differences of results from same participants over different conditions

  3. Conclusive Research Descriptive Causal Experimentation Field Experiments Laboratory Experiments Experimental research as conclusive research

  4. Preexperimental designs • One-Group After-Only • One-Group Before-After • Nonequivalent posttest-only

  5. Validity in experimentation • Internal validity • Is effect CAUSED by manipulation of independent variable? • Rival hypothesis / extraneous variables • External validity • Generalization beyond experimental situation

  6. Randomized Two-Group Design

  7. Before-After Two Group Design

  8. Solomon Four-Group Design

  9. 22 Factorial Design

  10. Repeated Measures

  11. Static-Group Comparison Design

  12. Pretest-Posttest Nonequivalent Control Group Design

  13. Regression-Discontinuity Design

  14. One-Group Pretest-Posttest Design

  15. Interrupted Time-Series Design

  16. Replicated Interrupted Time-Series Design

  17. Laboratory versus Field experiments

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