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Alertness
Linked via "Ocular-Kinetic Response Latency Test (OKRLT)"
Measurement and Standardization
Quantifying alertness remains a challenge due to the subjective nature of conscious experience. Standardized testing often employs the Ocular-Kinetic Response Latency Test (OKRLT), which measures the time taken for the eye to track a simulated predatory movement ($30^\circ$ lateral displacement at $150\text{deg}/\text{s}$) while the subject is simultaneously required to maintain a baseline [heart rate](/entries/heart-rate/…