You evaluate a patient in a psychiatric hospital who has a h…

You evaluate a patient in a psychiatric hospital who has a history of mood disturbances and psychotic symptoms.  Which of the following pieces of information would most help you make the differential diagnosis between Schizoaffective Disorder and Mood Disorder with Psychotic Features?

You pour water from a short, fat glass into a tall, thin gla…

You pour water from a short, fat glass into a tall, thin glass.  You ask a child if there is more water in the thin glass than there was in the fat glass.  The child says, “No.  The amount of the water has not changed.”  The child has attained at least the _____________ stage of cognitive development.