Quasi-experimental research is research that looks like experimental research but is not true experimental research. In experimental design, participants are assigned to the treatment or control group using a random procedure (i.e. Random assignment). In quasi-experimental research, however, the participants are not randomly assigned. There is No random assignment in quasi-experimental research. Because of this, quasi-experiments are generally conducted in field settings, rather than a controlled lab environment. To get you started, here is a video on Quasi-experimental design: https://www.youtube.com/watch?v=GwvjXW2WIsU.

Here is a video lecture on quasi-experimental research. The presenter starts with the following: "Quasi-experimental designs look and feel like experimental designs, but they always lack the key feature of random assignment, they can lack the feature of manipulation in comparison as well as does a true experiment". Here is the reference. Research Designs: Quasi-Experimental Designs (2016). University of Amsterdam. Retrieved from https://www.youtube.com/watch?v=3N-DKY09GM4