2. the original concept of research should change the format, but the tools used to collect the data. From a query as a form or interview or interviews, observations, or using multiple formats combined.
2. Should the original research The format used for data collection. From questionnaires, interview Or interview Or observation Or use multiple combinations.
2. Should research the line. But changed the format of the tools used to collect data. From the questionnaire interview or interviews, observation, or take many forms together.