Experimental designs
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Experimental designs PowerPoint PPT Presentation


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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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Experimental designs

Experimental designs


Between within subjects

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


Experimental research as conclusive research

Conclusive

Research

Descriptive

Causal

Experimentation

Field

Experiments

Laboratory

Experiments

Experimental research as conclusive research


Preexperimental designs

Preexperimental designs

  • One-Group After-Only

  • One-Group Before-After

  • Nonequivalent posttest-only


Validity in experimentation

Validity in experimentation

  • Internal validity

    • Is effect CAUSED by manipulation of independent variable?

    • Rival hypothesis / extraneous variables

  • External validity

    • Generalization beyond experimental situation


Randomized two group design

Randomized Two-Group Design


Before after two group design

Before-After Two Group Design


Solomon four group design

Solomon Four-Group Design


2 2 factorial design

22 Factorial Design


Repeated measures

Repeated Measures


Static group comparison design

Static-Group Comparison Design


Pretest posttest nonequivalent control group design

Pretest-Posttest Nonequivalent Control Group Design


Regression discontinuity design

Regression-Discontinuity Design


One group pretest posttest design

One-Group Pretest-Posttest Design


Interrupted time series design

Interrupted Time-Series Design


Replicated interrupted time series design

Replicated Interrupted Time-Series Design


Laboratory versus field experiments

Laboratory versus Field experiments


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