Final answer:
Qualitative interviewing allows for the exploration of issues that cannot be directly observed and encourages candid sharing of personal thoughts and beliefs.
Step-by-step explanation:
An advantage of qualitative interviewing relative to participant observation is that it allows researchers to find out about issues that are resistant to observation. Qualitative interviews enable participants to share personal information about internal thought processes and beliefs that might not be directly observable and are difficult to candidly discuss in public settings. Such qualitative data can provide in-depth insights, as personal explanations are expressed through individuals' own words, which are subjective and may vary greatly.