Chapter 9 Fundamentals of Research. Experimental Research A deliberate manipulation of a variable to...
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Transcript of Chapter 9 Fundamentals of Research. Experimental Research A deliberate manipulation of a variable to...
![Page 1: Chapter 9 Fundamentals of Research. Experimental Research A deliberate manipulation of a variable to see if corresponding changes in behavior result,](https://reader036.fdocuments.us/reader036/viewer/2022062301/56649ebd5503460f94bc6877/html5/thumbnails/1.jpg)
Chapter 9Fundamentals of Research
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Experimental Research
A deliberate manipulation of a variable to see if
corresponding changes in
behavior result, allowing the
determination of cause-and-effect
relationshipsExample Hypothesis: Violent TV
Programs cause Children to be More Aggressive
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The Experiment: Variables
Independent Variable=manipulatedDependent Variable=measured
What is the IV (& DV)?Light or No LightPlant Growth
What is the IV (& DV)?AggressionViolent TV Or No Violent tv
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Levels of Measurement
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The Experiment: Groups
Experimental Group=Treatment
Control Group=no treatment
Which Group should watch violent tv?
ExperimentalControl
Experimental Group Control Group
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The Importance of Randomization
Random Assignment
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Experimental Hazards Placebo Effect -Single/Double Blind Procedure Experimenter Effect Hawthorne effect
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Confounding & Extraneous Variables
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Evaluating Results Significant Outcome
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External & Internal Validity
Pair Share: Explain the relationship between
internal validity & extraneous variables.
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Post-Facto Research
Study Time
Exam
Sco
res
Exam
Sco
res
Party Time
-0.6321
Measuring the relationships between 2 variables