I am confused. I am hoping to undertake quantitative questionnaire based research exploring coping and stress in a Australian workplace, but I don't know which stress scale to use. My colleagues suggest using the stress scale from the Depression, Anxiety and Stress Scales (DASS-21) because it is normed on an Australian population and that I can also measure depression and anxiety with the other scales; however, the Perceived Stress Scale (PSS) appears to the most commonly used measure published research. There is no reason why I can't use the depression and anxiety scales from the DASS-21 and the PSS, or just use the DASS-21. What are your thoughts?