Fixation time

Cognitive workload increases fixation time in humans.

“Processing time, fixation time, fixation size and fixation area and their variability increased progressively from the first to the third number within each addition sequence, consistent with increasing cognitive workload.”

Humansduring mental addition sequence in OCATn = 350

Demographic-Adjusted Normative Equations for the Oculo-Cognitive Addition Test (OCAT): A Foundation for Individualized Oculo-Cognitive Assessment · Journal of Eye Movement Research · 2 Oct 2026