Critiques should examine and evaluate the way in which a scientist sets out to solve a problem and integrate his or her findings into the body of research that preceded the work. The student should evaluate and recognize the processes involved in the study, the research analysis, and the research publication. Remember, the purpose is one of evaluation, not merely description.
Evaluation is the act of deciding what is good, bad, or mediocre.
It requires taking a debatable position on the work you read. Read and reread the paper carefully with increasing attention to detail each time. Evaluate the paper as an exercise of the scientific method. The critique should be written in paragraph form. The length of the critique does not reflect the quality.