जब ज्ञान प्रतिरूपणीय (प्रतिकृति योग्य) और सत्यापन योग्य हो जाता है, तो उसे कहा जाता 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?