Description
Sensitive to subtle changes in neuropsychological status, but relatively insensitive to the effect of repeated administrations, the DVT is a simple task designed to measure vigilance during rapid visual tracking and accurate selection of target stimuli. It appears to isolate alertness and vigilance while placing minimal demands on two other components of attention: selectivity and capacity. Administration and scoring can be accomplished by individuals with no formal training under the supervision of a qualified psychologist. Interpretation within the context of a comprehensive neuropsychological evaluation requires training in clinical psychology or neuropsychology.