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Experimental Research (Criteria for a Well-Designed Experiment (Adequate…
Experimental Research
Criteria for a Well-Designed Experiment
Adequate experimental control
Lack of artificiality
Basis for comparison
Adequate information from the data
Uncontaminated data
No counfounding of relevant variables
Representativeness
Parsimony
Experimental Design
Posttest-Only Control Group Design
Pretest-Posttest Control Group Design
Solomon Four-Group Design
Factorial Designs
Repeated Measures Design
Experimental Variables
Type of instructional organisation
Team teaching
Self-contained classroom
Type of materials for concept attainment
Verbal
Figural
Drug dosage for experimental animal
5 grams
10 grams
15 grams
Time of day for instruction
Morning
Afternoon
Type of therapy
Medication alone
Exercise alone
Medication and exercise combined
Experimental Validity
Internal validity
Threats
History
Maturation
Testing
Instrumentation
Statistical regression
Differential selection of subjects
Experimental mortality or differential loss of subjects
Selection
External validity
Threats
Interaction effect of testing
Interaction effects of selection biases and the experimental treatment
Reactive effects of experimental arrangement
Multiple-treatment interference
Quasi-Experimental Research
Quasi-Experimental Designs
Posttest-Only, Nonequivalent Control Group Design