Question: Describe some of the problems that can arise when the participants in one treatment condition of a between-subjects experiment are allowed to communicate with participants

Describe some of the problems that can arise when the participants in one treatment condition of a between-subjects experiment are allowed to communicate with participants in a different condition.

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Whenever the participants in one treatment condition are allowed to talk with the participants in another condition there is the potential for a variety of problems to develop One such problem is diffusion Diffusion refers to the spread of the treatment from the experimental group to the control group which tends to reduce the difference between the two conditions This is a threat to the internal validity of a betweensubjects design because the true effects of the treatment can be masked by the shared information ie it appears that there is no difference between the groups because both groups are actually getting much of the same treatment Another risk is that an untreated group learns about the treatment being received by the other group and demands the same or equal treatment This is referred to as compensatory equalization Problems can also occur when participants in an ... View full answer

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