What You Should Consider :
What You Should Consider How quasi-experimental designs differ from true experimental designs
Basic characteristics of each of the quasi-experimental designs
How rival hypotheses are ruled out in each of the quasi-experimental designs
Design Nomenclature :
Design Nomenclature R – Random assignment to group
N – Non-random assignment to group
O – Observation
X – Treatment
Experimental Designs :
Experimental Designs Post-test only with random assignment
Pre-test, post-test with random assignment
Solomon four groups design
Post-test only with Random Assignment :
Post-test only with Random Assignment
Pre-test, Post-test Designwith Random Assignment :
Pre-test, Post-test Designwith Random Assignment
Solomon Four Groups Design :
Solomon Four Groups Design
Experimental Designs and Validity :
Experimental Designs and Validity
Can We Draw Causal Inferences? :
Can We Draw Causal Inferences? Explanations must be plausible given circumstances
Consistent with data in situations where rival hypotheses shown to be implausible
Identification of what is and is not plausible, is not always apparent
Need to evaluate interpretation issues