Reseach Methods Lecture 4

Reseach Methods Lecture 4 - ResearchMethodsin...

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Research Methods in  Research Methods in  Psychology Psychology EXPERIMENTAL METHODS: September 28, 2009
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Agenda:  Agenda:  Announcements Review Break Lecture Chapter 9: Complex Designs Final project description
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Quiz Review: Quiz Review: What distinguishes the experimental method from  other research methods? (i.e. what is/are the  goal(s) of and advantages of conducting a  research study using the experimental method? Experimental Method is one type of Research  Method (pp. 205-208)  Main goal: Explanation
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Review: Review: Differences Between Correlation Research and the  Experimental Method:  Correlation Research-  when two measures vary together  or go together Can be positive or negative Experimental Method Causal  Inference- statements about the cause of an event  or a behavior (3 conditions) Control- to eliminate confoundings (3 techniques) Correlation Research Experimental  Method Goal Prediction Explanation  (cause) Design Types Natural Groups  Design Random Groups;  Repeated Measures 
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Review: Review: Differences between Independent Groups  and Repeated Measures designs: Independent Groups example:  Body Image  Experiment Repeated Measures example:  Recognizing Emotions  Experiment Independent Groups Repeated Measures  IV Manipulation Participant  experiences one  condition of IV Participant  experiences every  condition of IV at  least once
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Review: Review: Differences between Independent Groups  and Repeated Measures designs: Individual Difference Variables-  characteristics of  research participants (i.e., personality, intelligence, age,  ethnicity, gender, etc) Practice Effects-  changes participants undergo with  repeated testing (boredom, fatigue, experience, learning,  etc) Independent Groups Repeated Measures  Main threat to  internal validity Individual difference  variables Practice effects
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Reseach Methods Lecture 4 - ResearchMethodsin...

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