Cognitive workload differences were detected during human-computer interaction with high and low levels of automation using three different measures of cognitive workload (NASA-TLX subjective surveys, time of run, and visual fixation rate).
A positive correlation was found between NASA-TLX subjective workload rating and time of run.
A positive correlation was found between NASA-TLX subjective workload rating and visual fixation rate.
Human physiology, such as fixation rate, can be used to assess cognitive workload almost in real-time.