Dementia(Latin dementia) is a syndrome of symptoms appearing especially in elderly people. The syndrome's picture is dominated by disorders of the so-called higher cognitive functions (memory, thinking, orientation, understanding, counting, learning ability, speech). Contrary to the opinions of some, it is not synonymous with the natural process of ageing or mental impairment, but the result of a disease process located in the central nervous system. What psychological diagnostic tools do the doctor and psychologist use to assess the severity of dementia?