Figure 4.

The prototype of an application testing the recognition of numbers and letters in the correct order implemented in a VR environment on an Oculus Go device. Trail B is generally thought to be sensitive to executive functioning since it requires a wide range of skills to complete. In 2D, it engages attention, memory, visual screening abilities, motor functioning, and cognitive processes, and it is likely to be even more difficult in 3D. Squares in green are already marked, and in white will be chosen in the proper order by the pointer in pink.