Quasi-experiment

A quasi-experiment is a research design that seeks to evaluate the effects of an intervention or treatment but lacks random assignment of participants to treatment and control groups. Unlike true experiments, where participants are randomly assigned, quasi-experiments often rely on pre-existing groups or conditions which can introduce potential biases. In a quasi-experiment, researchers might compare outcomes in a group that received the intervention to a group that did not, or they may examine changes over time with a single group before and after the intervention.