Job survey results from over 10,000 bedside nurses, in conjunction with hospital discharge abstracts of surgical patients were reviewed. Results of the survey found that over 40% of the nurse respondents, who averaged 10 years of experience, reported high job dissatisfaction and emotional exhaustion or burnout (Aiken et al., 2002). What would be the most challenging variable to control in such a qualitative study? How would you resolve this issue?