Yes. Furthermore, depression itself inhibits cognitive function and, if untreated, can accelerate the progression of AD. To discern whether an individual with AD is clinically depressed, physicians look for signs of reduced interaction with others and loss of interest in daily routines, as well as signs of low mood. This can be challenging to diagnose as Alzheimer's Disease progressively erodes verbal ability. For those who are depressed in the early (still verbal) stages of Alzheimer's Disease, support groups and therapy are key interventions.