which of the following is true of quasi-experiments? group of answer choices participants are not randomly assigned to groups. quasi-experiments use random assignment. quasi-experiments involve manipulated variables. quasi-experiments cannot have comparison groups.

A quasi-experiment is an empirical interventional study that does not use randomization to determine the causal effects of an intervention on the target population. When compared to a standard experimental design or randomized controlled trial, quasi-experimental research is similar, but it specifically excludes the component of random assignment to treatment or control groups. As opposed to random assignment, quasi-experimental designs often allow the researcher to regulate the assigned task to the treatment condition. Internal validity issues with quasi-experiments can arise because the control and treatment groups may not be similar at baseline. In other words, it might not be able to prove conclusively that the treatment condition caused the observed effects.

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