These are required for all research studies.
Examples of data collection tools are questionnaires, case report forms and interview / focus group scripts.
Researchers should only collect the minimum amount of data and biological samples necessary to answer their research questions. Special attention should be paid when collecting data that are particularly sensitive, for example: ethnicity, sexuality, mental health, genetic information, etc.
You will learn more about data collection and management in Module 6: Managing personal data and biological samples.