John interviews 10 people about their memories from the first three years of their lives. He then writes an essay about early memory in humans. Which research method did he use to collect his data?
A) naturalistic observation
B) controlled experiment
C) correlation study
D) case study

Question

Quizplus · Accepted Answer

John conducted a case study by interviewing 10 people about their memories from the first three years of their lives. This type of research method is used when the goal is to obtain in-depth information about a single individual or a small group of individuals.

John Interviews 10 People About Their Memories from the First