In this task, the patient needs a discriminating eye to must either locate a symbol in a grid full of intricate symbols and letters (intruder) that differs from other symbols (all of which are identical), and catch the sneaky suspect that was shown before starting the task and that does not belong.
What it trains
Primarily, this task exercises the user’s abilities for a specific type of attention called sustained attention and concentration. Attention is the essence of focus and the user will need to focus on looking for a specific target and ignore the symbols that could distract his attention. Any time a person pays attention to something, and any time he/she ignores something, data is created in his/her brain. That data has value, but only if it’s gathered, measured, and analyzed. In addition, this exercise requires good visual scanning and shape recognition skills.
A predefined set of levels has been specially selected to ensure an easy start and grant a regular progression.