An unstructured interview is an interview in which questions are not prearranged, allowing for spontaneity and for questions to develop during the course of the interview. This is considered to be the opposite of a structured interview which offers a set amount of standardised questions.

Unstructured interviews
Unstructured Interviews
Unstructured Interviews
Belief in the unstructured interview: The persistence of an illusion
Unstructured interviews: challenges when participants have a major depressive illness
Patterned behavior description interviews versus unstructured interviews: A comparative validity study.
Inpatient diagnostic assessments: 1. Accuracy of structured vs. unstructured interviews ☆
Initial comparisons of patterned behavior description interviews versus unstructured interviews.
Inpatient diagnostic assessments: 2. Interrater reliability and outcomes of structured vs. unstructured interviews
Awareness level of obstructive sleep apnea syndrome during routine unstructured interviews of a standardized patient by primary care...