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Exploring Quasi-experiments Lab Assignment #5Due May 16, 2008

Locate an empirical journal article that employs a quasi-experimental design. Closely critique the article by completing the following slides.

You should hand in your responses by printing the slides six to a page.

Be sure to include a copy of the article with your assignment.

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Purpose of Research

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Variables of interest

• The Independent Variables (causes)

• The Dependent Variables (outcomes)

• The Covariates

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Participant assignment

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Cook and Campbell’s UTOS

• Units:

• Treatment:

• Observations:

• Setting:

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Threats to Internal ValiditySpecific to Quasi-experiments

• History:

• Maturation:

• Instrumentation:

• Statistical Regression:

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AdditionalThreats to Internal Validity

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Threats to Construct Validity

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Threats to External Validity

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Threats to Statistical Conclusion Validity

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Improving the research