After reviewing some discussions on utilizing the pre-experimental study for the elderly sleep intervention, I am curious as to why it is referred to as “pre-experimental” rather than experimental design.

My pleasure.

I understand now. Your explanation was helpful.

Thank you for your question. The differentiation is based on whether there is a control group included in the study design. As mentioned in earlier posts, there is only one treatment group for the novel intervention, which categorizes it as a pre-experimental design.