Estimated costs for electronic and paper-based questionnaires with 10, 20, 30, or 42 questions and different cohort sizes.
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Costs are calculated with student working hours ($17.4/h), except for the implementation of the questionnaire in an Internet program ($77.8/h, 8 h professional work), and are based on our results according to the different cohorts.Estimated costs for electronic and paper-based questionnaires with 10, 20, 30, or 42 questions and different cohort sizes.
创建时间：
2015-12-02
