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CHAPTER 10 : Experimental Design - Coggle Diagram
CHAPTER 10 : Experimental Design
Types of variables based on relationship
Independent variable (IV)
Cause factor & cause is something makes something else happen
Dependent variable (DV)
Effect factor & effect what happens as a result of cause
Moderating Variable (MV)
Second IV included because it is believed have significant effect on original IV-DV
Extraneous Variable
factors disturb the relationship between DV & IV
Intervening Variable (IIV)
factors theoretically affect the observed phenomenon but cannot be seen/measured/manipulated
What is experimentation :question:
to examine the possible cause & effect relationship among variables
Conditions to establish cause & effect relationship
X & Y should covary
X - cause Y- effect
How to do experimentation :question:
Stage 1 : control the contaminating factors
Stage 2 : manipulate the IV
Stage 3 : measure the change in IV
Field Experiment vs Lab Experiment
Lab experiment
controls & manipulation are done in an artificial setting where the causal effect can be tested
Field Experiment
done in natural environment where work goes on as usual, but treatment given to one or more groups
Method of controlling contaminating method
Matching group method
Randomization Method
Validity in Experimentation
internally valid to show a cause-effect relationship between IV & DV
Factors affecting
Reactive effect of testing
Selection treatment interaction
Reactive effects of experimental arrangement
Multiple treatment interference
External validity refer to the results of study can be generalized
Pre-experimental design
The one-shot case study
One group pre test post-test study
The static group comparison study
Quasi experimental design
pre-test only with experimental & control groups
True experimental design
Pre-test & post-test experimental & control group design
Solomon Four-group design
