When participants in an experiment communicate with each other, the difference between groups may be reduced. This is called:

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Diffusion refers to the spread of information or behaviors from one group to another. In the context of an experiment, if participants in different groups communicate with each other, they may start to adopt each other's behaviors or strategies, which can reduce the differences between the groups. This is a common problem in experimental research, as it can make it harder to identify the true effects of the independent variable. Therefore, researchers often try to minimize diffusion by keeping participants in separate groups and limiting their communication with each other.

When Participants in an Experiment Communicate with Each Other, the Difference