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One group in experiment, only examined one time. Lack of randomization
One group pretest-posttest design
One group is examined before and after the stimulus was added. Lack of randomization
Static Group Test design
One control group and one experimental group. Only post test. Lack of randomization
Pretest-posttest control group design
Two groups are examined before and after the stimulus was added. Randomization or matching should be used.
Posttest-only control group design
Two groups are examined after the stimulus was added. There is a need for randomization.
People in experiment are observed in their natural setting and have no idea they are being watched.
Observation of a artificial situation.
People know they are being observed.
People do not know they are being observed.
Researchers observe actual behavior.
Infer behavior through some record of past behavior. (pantry check)
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