Flashcards
Quasi-experimental designs
Cards in this deck (11)
- 1One-group Posttest only designSubjects -> IV -> DV
Probably the worst method; there are many weaknesses such as validity and reliability in this method - 2One-group pretest-posttest designSubjects -> Pretest -> IV -> DV
There are many other explanations for results in this design, so it is not all that valid. - 3Other possible explanations for resultsHistory, Maturation, Testing, Instrument decay, Regression to the mean
- 4Historyextraneous events are those which occur outside of the experiment that can cause a change in the results, such as media coverage, change in social perception, etc.
- 5MaturationMaturation effects are those caused by developmental change over time; adolescents are a common demographic to be involved in maturation effects.
- 6TestingTesting is the effect arising from the pretesting and posttesting of subjects; the subjects become aware of relevant factors involved in the testing and change their responses appropriately.
- 7Instrument DecayInstrument decay explains results as mere changes in the measurement techniques; fatigue is a common cause of instrument decay when experimenters are recording data.
- 8Regression to the meanIf individuals are extreme on a first measurement then there is a strong statistical likelihood that they will be less extreme, closer to the mean, on the seond measurement; the reverse is also possible.
- 9Nonequivalent control group designSchool 1 -> IV -> DV
School 2 -> NoIV -> DV
This method mitigates the risk of alternative explanations; however, you are unable to determine whether the groups are homogenous. - 10Nonequivalent control group pretest-posttest designS1 -> Pretest -> IV -> DV
S2 -> Pretest -> NoIV -> DV - 11Difference between these methods and experimental methodsThe groups are not randomly assigned.
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- Flashcards on Quasi-experimental designs, created by cjjstone on 22/05/2014.
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