The correct answer is Subjectivity
Explanation:
Qualitative studies focus on analyzing a specific phenomenon using qualities or characteristics rather than numbers. Due to this, in a qualitative study, the researcher is the one who interprets the data collected based on instruments such as interviews or observation. This feature of qualitative studies makes it is more likely for researchers to include their ideas, beliefs, perceptions that are all part of subjectivity. Due to this, methods should be rigidly followed to avoid subjectivity or bias. Thus, qualitative studies must be conducted with extreme rigor due to its potential for subjectivity.
