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Use only one concept per question
Use only one concept per question, unless the question is a matrix. Using more than one concept in a question tends to confuse the respondent and can generate unreliable answers.
Example:
Did our survey software and our online survey tool improve your productivity?
can be split into two questions as follows:
Did our survey software improve your productivity?
Did our online survey tool service improve your productivity?
Remember that you will always get no more than what you ask for... Happy Surveying!
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