Replication Data for: Smooth-pursuit eye movement to detect mental fatigue

An eye-typing experiment was conducted with able-bodied participants. The eye-typing is implemented using smooth-pursuit eye movements. The experiment was conducted in two sessions for every participant, one session in the morning and one session in the afternoon. Each session consisted of two trials. The trials had varying difficulty levels, to generate cognitive load and thereby induce mental fatigue. Before and after every session, the participants reported their fatigue level. The effect of time of day and time-on-task on mental fatigue is investigated. Eye-tracking data was collected during the eye-typing experiment. The performance of smooth-pursuit eye movements and the effect of mental fatigue is examined. The files included in the dataset are -- (1) self-reported values on mental fatigue, physical fatigue and sleepiness, (2) eye-typing performance metrics on trial duration, typing speed and corrected error rate, (3) smooth-pursuit gaze deviation and (4) smooth-pursuit gaze deviation and velocity gain. The metadata common to all the files is a unique subject identifier, session number, session type (morning followed by afternoon, MA, or afternoon followed by morning, AM), session time (morning, M, or afternoon, A), trial number or time of report and alertness score.

本研究针对健康受试者开展了一项眼控打字（eye-typing）实验。本次眼控打字采用平稳追踪眼动（smooth-pursuit eye movements）实现。每位受试者均完成两轮实验时段，分别于上午和下午各开展一轮；每轮实验包含两项试次。各试次设置了不同难度等级，以产生认知负荷并诱发精神疲劳。每轮实验前后，受试者均需报告自身疲劳程度。本研究旨在探究时段与任务时长对精神疲劳的影响。实验过程中同步采集眼动追踪（eye-tracking）数据，对平稳追踪眼动表现及精神疲劳的影响效应展开考察。本数据集包含以下四类文件：(1) 受试者自我报告的精神疲劳、躯体疲劳与嗜睡程度数据；(2) 眼控打字表现指标，涵盖试次时长、打字速度与校正错误率；(3) 平稳追踪眼动注视偏差数据；(4) 平稳追踪眼动注视偏差与速度增益数据。所有文件均共享以下元数据：唯一受试者标识符、实验时段编号、实验时段类型（上午优先记为MA，或下午优先记为AM）、实验时段时刻（上午记为M，下午记为A）、试次编号或报告时间，以及警觉性评分。