chapter 9 fundamentals of research. experimental research a deliberate manipulation of a variable to...
TRANSCRIPT
Chapter 9Fundamentals of Research
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
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
Levels of Measurement
The Experiment: Groups
Experimental Group=Treatment
Control Group=no treatment
Which Group should watch violent tv?
ExperimentalControl
Experimental Group Control Group
The Importance of Randomization
Random Assignment
Experimental Hazards Placebo Effect -Single/Double Blind Procedure Experimenter Effect Hawthorne effect
Confounding & Extraneous Variables
Evaluating Results Significant Outcome
External & Internal Validity
Pair Share: Explain the relationship between
internal validity & extraneous variables.
Post-Facto Research
Study Time
Exam
Sco
res
Exam
Sco
res
Party Time
-0.6321
Measuring the relationships between 2 variables