User:Kristaa68/sandbox

The Trail-making test is a neuropsychological test of visual attention and task switching. The task requires a subject to 'connect-the-dots' of 25 consecutive targets on a sheet of paper or computer screen. Two versions are available: A, in which the targets are all numbers (1,2,3, etc.), and B, in which the subject alternates between numbers and letters (1, A, 2, B, etc.). The goal of the subject is to finish the test as quickly as possible, and the time taken to complete the test is used as the primary performance metric.

The test was initially used for assessing general intelligence (and was part of the Army Individual Test of General Ability), but has since become a common diagnostic tool in clinical settings as well, as poor performance is known to be associated with many types of brain impairment; in particular frontal lobe lesions.