Answer:
Case study research
Step-by-step explanation:
In a study where the researchers describe the acute mental confusion, irrelevant speech, irritable mood and auditory hallucinations after taking disulfiram (Antabuse) on one subject, this is an example of case study research.
A case study research is a type of qualitative research in which the researcher focuses on a unit of study known as bounded system. for example, a researcher focusing on an individual, a class, a community. In the scenario above, the single subject is being evaluated as a case study.