*6.3.1.2 Digit symbol test DST*

Nine fixed pairs of numbers and symbols are present at the top of the test sheet. The patient is given a series of double boxes with a number given in the upper part. The target is to draw a symbol related to this number into the lower part of the boxes. The test result is the number of boxes correctly filled in 90 s (**Figure 5**). Pathological test results indicate a deficit in visuoconstructive abilities. [82]. DST will be considered abnormal when the test scores are less than the mean − 2 SDs from the age-matched normal values [79].
