give me an answer for this question and put it in a short answer with clear and simple words so no AI is detected "So far we have focused primarily on questionnaire-based assessment measures. Another class of assessment measures is observational measures, in which the therapist observes a client(s) engaged in an activity and makes ratings or notes about specific behaviors. Observational measures can be used with individuals, couples, and families. In the case of a couple or family, why could observational measures be helpful in an assessment? What kind of information would an observational measure yield that a questionnaire measure might not