During a multi-year experiment on the effect of an intervention program designed to reduce the potential for domestic violence, an experimental researcher learns that there is no difference in the frequency of domestic conflict between the men in the experimental and control groups. What type of threat to the internal validity of this experiment's results is this problem?

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The Answer of During a multi-year experiment on the effect of an intervention program designed to reduce the potential for domestic violence, an experimental researcher learns that there is no difference in the frequency of domestic conflict between the men in the experimental and control groups. What type of threat to the internal validity of this experiment's results is this problem?

During a Multi-Year Experiment on the Effect of an Intervention