For each of the following statements, indicate whether it is true or false and explain why.

1. Studying the merger of two companies could be conducted via a case study approach.
2. Action research could be used to study the implementation of a new performance appraisal system.
3. Ethnographic research is only used when looking at the behavior of various nationalities.
4. The Hawthorne effect should be considered when administering surveys.
5. Interviews are an effective method of secondary data collection.