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Lecture Notes for PSYC 2094 - Prin Psych Res with Bill at Virginia Tech (VT)

Notes Information

Material Type:Note 3
Professor:Bill
Class:PSYC 2094 - Prin Psych Res
Subject:Psychology
University:Virginia Polytechnic Institute And State University
Term:Fall 2006
Keywords:
  • Participants
  • Experimenter Effects
  • Participant
  • Experimenter Expectations
  • Demand Characteristics
  • Cross Training
  • Unfortunately
  • Figure-Ground Relationship
  • Combination
  • Circumstances
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Sample Document Text

1 Class 16 Quiz 2 Class 17 Quiz Review Validity in Experimentation Experimental Validity . Truth or correctness of inferences made from research conclusions. - Statistical conclusion validity (accuracy of conclusion about whether variables co-vary) - Internal validity (accuracy of inferences about IV causing effect observed on DV) - Construct validity (accuracy of inferences about the constructs we study) - External validity (accuracy of inferences about what will happen outside the study) . Cannot simultaneously achieve all four types - methods to achieve one often reduce chance of achieving another. Statistical Conclusion Validity . Accuracy of an inference about whether the independent and dependent variables co-vary . Did statistical conclusion lead to a Type I or a Type II error? . Threatened by: - Inadequate sample size - Underpowered analytic methods Internal Validity . Accuracy of the inference that the independent variable caused the effect observed in the d...

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