Pupil diameter variation in a visual interpretation task
Abstract
An indirect measurement o£ mental effort in interpreting an
aircraft instirument was made using changes in pupil diameter and the
latency of dilation as measures. Significance was found in latency of
dilation across levels of interpretation difficulty, while no significance
was found for percent changes in pupil diameter.
Results also showed a moving base-Hne pupil diameter for all
subjects across trials suggesting arousal decrement for the first
half of the experiment, with a lesser effect for the latter half of the
experiment.
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