Fig. 1
New software was designed and programmed with 12 different sequential location scenarios [LS-(n)] (red arrows). Each LS consisted of 8 stimuli belonging to a specific complexity group [CG(n)]], which were positioned at specific eccentricity (10o, 20o or 30o) along 8 specific radial positions [P(n)]. Each stimulus position was fixed at each LS-n, but it changed randomly between scenarios. A total of 96 objective measurements were recorded for each one of the six different variables registered during the 4 steps that constituted the new visual processing speed (VPS) evaluation protocol: search reaction time (S-RT; at Step 2), degrees of absolute head movements [dHM; at Step 2 and Step 4 by means of a head-tracker mask (HTm)], reach reaction time (R-RT; at Step 4), eye-hand coordination accuracy (ehcA; at Step 4), and eye-hand coordination mistakes (ehcM; at Step 4)