Experimental Designs

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Experimental Designs

• Three Characteristics
• manipulation
• control
• random selection

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Random Selection vs. Random Assignment
quasi-experimental
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Example of a Randomized Posttest-Only Control
Group Design
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Example of a Randomized Pretest-Posttest Control
Group Design
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Randomized Solomon Four-Group Design
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Randomized Posttest Only Control Group Design
quasi-experimental
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A Randomized Posttest-Only Control Group Design,
Using Matched Subjects
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Factorial Designs
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Factorial Designs (cond)

• 2 x 2 x 2
• gender x achievement x socioeconomic status
• 2 x 3 x 4
• teacher x curriculum x grouping

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Single-Subject Designs
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Single-Subject Designs (cond)
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Single-Subject Designs (cond)
School attendance after reintroduction of school
attendance reinforcement intervention
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SummaryExperimental Designs

• Characteristics of Experimental Designs
• Random Selection vs. Random Assignment
• Randomized Post-test Only Control Group Design
• Randomized Pre-test Post-test Control Group
  Design
• Randomized Solomon Four-Group Design

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Summary (cond)

• Randomized Posttest Only Control Group Design
  (matching-quasi-experimental)
• Factorial Designs
• Single-Subject Designs