Non-Experimental Research
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Non-Experimental Research

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What is non-experimental research?. Take people as they are and measure themHave already conducted one type: Correlation(terminology and use of correlational study to refer to non-experimental)Other types of non-experimental: key question = are groups different from each other. First, though. Tw
Non-Experimental Research

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1. Non-Experimental Research Corey and Lachter chapter 6

2. What is non-experimental research? Take people as they are and measure them Have already conducted one type: Correlation (terminology and use of correlational study to refer to non-experimental) Other types of non-experimental: key question = are groups different from each other

3. First, though? Two types of pre-non-experimental research to address: Demonstration Case study Both = first step in research Demonstration: how do people behave in a certain situation? Just one variable Case study: how does one person behave?

4. Demonstration Why use? Asch, as demonstration Milgram, as demonstration Advantages? Disadvantages? More modern day possibilities? (either actual or that would make sense to do)

5. Case study May have unique case Psychological disorder Unique history Like a demonstration, with one person, or like a non-experimental version of a single subject design: how does this person behave Can then do follow-up research, to test whether certain variables are playing a role

6. Case study Examples? Advantages? Disadvantages?

7. Back to more traditional non-experimental designs Correlation Key question? When use? Advantages? Disadvantages?

8. Other types of non-experimental Static groups Ex post facto Time series

9. Static groups People are in groups that *could* be changed, but come into the study in a pre-existing group For ethical reasons, cannot change Want to know if two groups differ on some variable

10. Static groups Examples? Advantages? Disadvantages?

11. Ex post facto Like static groups, but people are born into the group Again, for ethical (and practical) reasons, cannot change

12. Ex post facto Examples? Advantages? Disadvantages?

13. Time series Key question = did some event change people? Predictor variable = before or after event Criterion variable = some behavior Again, cannot manipulate predictor variable Why not?

14. Time series Examples? Advantages? Disadvantages?

15. Another way to divide study designs Think back to the distinction between independent-samples t-tests and dependent-samples t-tests Between-subjects Within-subjects

16. The good and the bad of non-experimental What can non-experimental designs tell you about? What can they not tell you about? What sorts of big questions could you address with them? What sorts of hypotheses could go with those big questions? What other causal paths could there be?

17. Applying it all What?s the big question, the type of design, and what other causal variables? Teaching technique and student performance Day/evening classes Spending habits before and after Katrina Traffic patterns in London after charges for driving downtown Gender and math ability


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