Emily is a doctoral student in psychology. She plans to use ________ to complete her doctoral paper, carefully monitoring a group of children without interacting with them. She's also thinking about...

Emily is a doctoral student in psychology. She plans to use ________ to complete her doctoral paper, carefully monitoring a group of children without interacting with them. She's also thinking about reaching out to them in the distant future to see how their beliefs differ over a 10-year period.