Final answer:
A symptom questionnaire, which is a type of self-report inventory, is a quick and effective method for clinicians to determine a person's symptoms. It allows for the structured assessment and quantification of subjective symptom experiences, unlike imaging techniques such as CT scans.
Step-by-step explanation:
Among the options provided for clinicians to quickly determine a person's symptoms, the most effective would be a symptom questionnaire. This is a form of a self-report inventory that patients can fill out to report their symptoms.
Unlike a Computerized tomography (CT) scan, which is an imaging technique used to visualize internal structures and assess for physical abnormalities such as tumors or brain atrophy, a symptom questionnaire can capture the subjective experiences of the patient, such as pain or nausea, that are not observable on a CT scan. The symptom questionnaire allows clinicians to assess and quantify symptoms in a structured manner, potentially using tools like the Wong-Baker Faces pain-rating scale.