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Example of a Two-Group Experiment: Technology in the Classroom
To test if technology use in the classroom affects learning, an experiment can be designed with two groups. The experimental group learns algebra using a computer program, which is the experimental manipulation. The control group learns the same subject from a teacher in a traditional classroom. Apart from the teaching method, both groups are treated similarly and their learning is measured in the same way to ensure a valid comparison.
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Ch.2 Psychological Research - Psychology @ OpenStax
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Control Group
Experimental Group
Example of a Two-Group Experiment: Technology in the Classroom
Logic of Causal Inference in Controlled Experiments
A researcher is conducting an experiment to determine if a new energy drink improves participants' performance on a complex puzzle. One group of participants drinks the new energy drink, while a second group drinks a similar-tasting beverage without the active ingredients. Both groups are then timed on how long it takes them to solve the same puzzle. For the researcher to validly conclude that the energy drink caused the observed difference in puzzle-solving times, which of the following is the most critical condition of the research design?
Factorial Design