Final answer:
The DSM-5 recommends starting with a clinical interview for case assessment, Freud's method was case study, and a researcher looking at job suitability would likely be an industrial-organizational psychologist.
Step-by-step explanation:
The DSM-5 suggests that every case begins with a careful clinical interview. This is the correct answer to the student's question. Sigmund Freud developed his theory of human personality using a research approach known as a case study. Lastly, a researcher interested in what factors make an employee best suited for a given job would most likely identify as a(n) industrial-organizational psychologist, a specialty area within psychology focused on workplace behavior.
The DSM-5, which stands for the Diagnostic and Statistical Manual of Mental Disorders, is a handbook used by mental health professionals to diagnose and classify mental disorders. It suggests that every case begins with a careful clinical interview. A clinical interview is a conversation between a mental health professional and a client, where the professional gathers information about the client's medical history, current symptoms, and other relevant details.