Studies that are structured like experiments but use groups that already exist instead of randomly assigning participants to control and experimental groups are called:

Question

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Quasi-experiments are studies that resemble experiments in their structure but do not involve random assignment to groups. Instead, groups that already exist are used, such as people who have already experienced a certain event or who are part of a certain population. This allows researchers to make comparisons between groups and examine cause-and-effect relationships, but without the same level of control as in a true experiment. The other options, analogue experiments, correlational experiments, and developmental experiments, do not involve the use of pre-existing groups and are not structured like experiments.

Studies That Are Structured Like Experiments but Use Groups That