I plan to use this tool for a quantitative study "proposal" to measure perceived stress. However, I am confused this tool because this tool (by Cohen) has ten questions that will assess stress "IN THE LAST MONTH".May I ask if it is possible to change "IN THE LAST MONTH" to perhaps a specific situation in one's life i.e. "during the COVID-19 pandemic"? Or this is not allowed?
Of course you can modify an existing tool, given you clearly indicate the modification in the Methods section of your proposal/protocol/paper.
Of course you can modify an existing tool, given you clearly indicate the modification in the Methods section of your proposal/protocol/paper.
It is allowed to do modifications as long as you exactly tell what you did so that another researcher can repeat your results and come to the same conclusion.
If you plan to significantly modify the instrument you need to do the appropriate tests for validity and reliability
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