"I have great concern about relying on this idea that mood is solely internal and subjective," said Serby. "This results in simply asking the patient what they are feeling, accepting what they say, and recording it. When we see a patient for 30 minutes or an hour, we get a sense of that patient’s emotional state over time. The patient might appear to be joyless and might make numerous negative, bleak statements. But when asked about mood, the patient might say, ‘Fine, O.K.’ " Often, he continued, the resident reports the patient’s mood as described by the patient, instead of perceiving and reporting the depression as the patient’s overriding feeling.