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Drinking glucose improves listening span in students who miss breakfast

Drinking glucose improves listening span in students who miss breakfast. Morris & Sarll Presented by Dr. Christine Malone. Classifying the Design.

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Drinking glucose improves listening span in students who miss breakfast

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  1. Drinking glucose improves listening span in students who miss breakfast Morris & Sarll Presented by Dr. Christine Malone

  2. Classifying the Design • Please recall discussion Q9:This research report is identified as an example of “true experimental research” in the table of contents of this book. Do you agree with the classification? Why or why not? • Let’s share our answers. • What are the features of a true experiment?

  3. Features of an experiment • The experimenter manipulates at least one IV. A DV is used to measure the effects of the IV. • 4 characteristics of true experiments: 1 – MANIPULATION 2 – MEASUREMENT  3 –COMPARISON  4 – CONTROL • Is this a between-subjects or within-subjects design?

  4. Questions 1) What is the cause-effect relationship being tested by the authors? 2) What is the evidence that supports the above cause-effect relationship? 3) How would you rate the internal validity of this experiment? 4) Are there any threats to the internal validity of this experiment?

  5. Internal Validity • Extent to which other causes are ruled out—extent to which the difference in behavior can unambiguously be attributed to the manipulation  • A researcher's ultimate goal: “This is what happened, and this is what it means.” Any factor that raises doubts about the research results or about the interpretation of the results is a THREAT TO VALIDITY. • Manipulation Check--A measure to see whether the independent variable has the intended effect on the participant. Two ways to check the manipulation: (1) An explicit measure of the IV **Relevant here** 2) Ask specific questions about the manipulation after the experiment

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