What challenges or limitations did the researcher identify they encountered by choosing this method?

Locate a research study that utilized experimental or quasi-experimental methods. Briefly summarize the study. For example, discuss the inclusion of 2-group tests, regression analysis, and time-series analysis in terms of the study design’s strengths, weaknesses, or limitations. What challenges or limitations did the researcher identify they encountered by choosing this method?
Embed course material concepts, principles, and theories (which require supporting citations) in your initial response along with at least one scholarly, peer-reviewed journal article. APA style guidelines.