आगमनात्मक दृष्टिकोण (inductive approach) में सिद्धांत का निर्माण मुख्य रूप से किसके माध्यम से होता है?

A researcher wants to explore the effect of possible factors on the organization of effective computer-based learning interventions in schools. Which research method is most appropriate for this study?

Which of the following steps is NOT essential while designing a questionnaire?