Figure 1.
The virtual head as seen without the semi-transparent mask (100% transparency, left panel) and with the virtual mask (15 % transparency setting, right panel). In this example, the head is rotated 8° to its left such that the nose points to the subject's right and the virtual eyes are clearly averted to the subject's left. A green letter and arrow indicated the task for each trial (in this case, decenter the eyes to the left).