Answer :

participants The experiment has low internal validity because of this if individuals in one treatment group mimic the treatment of a different group.

To ensure the equivalence of the groups, the assignment of participants to groups and the assignment of these to treatments should be done randomly. This initial equivalence serves as the foundation for the design of the two randomized groups since it ensures that differences observed after treatment will be attributable to this impact if the groups are identical prior to treatment. In order for the groups to be equal, the sample must be big enough for chance to have a chance, in addition to the individuals being randomly assigned to the groups. treatment Classification Group two - Paraphrased

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