chap11 - QuasiExperimental Designs Researchinappliedsettings

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    Quasi-Experimental Designs
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    Research in applied settings True experiments may not be possible Still need to assess whether an independent  variable had an effect on a dependent  variable Does “3 strikes” reduce crime? Does “D.A.R.E. work? Does the new employee training program  reduce missed work days?
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    Program Evaluation Needs Assessment Program Theory Assessment Process Evaluation Outcome Evaluation Efficiency Assessment
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    Research Tools Surveys Naturalistic Observation Experiments Quasi-experiments
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    Nonequivalent control group  pretest-posttest design O  X  O ----------------- O      O Treatment and control groups may not  be equivalent – no random assignment Compare change in the two groups
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    Interrupted Time Series Design O O O O O O X O O O O O O  Change from immediately before to  after treatment is difficult to interpret Allows clearer interpretation of effect of  treatment
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This note was uploaded on 10/08/2010 for the course PSY 3001w taught by Professor Stellmack during the Fall '10 term at Minnesota.

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chap11 - QuasiExperimental Designs Researchinappliedsettings

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