The Samn-Perelli Scale is a 7-point Likert scale used to assess fatigue [42, 45]. by Marcel F. Hinss (14675457)

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Parameter diagram for the pit parts on the surface of the test specimen (a) Volume (b) Surface area (c) Depth (d) Cross-sectional area. by Yang Li (7082)

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Parameter diagram for the raised portions on the specimen surface (a) Volume (b) Surface Area (c) Height (d) Cross-sectional area. by Yang Li (7082)

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Graphs of surface roughness values of test specimens after testing with varying concentrations across different particle size groups (a) Ra, Rq (b) Rz (c) Sa, Sq (d) Sz, Sv. by Yang Li (7082)

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SEM image of 10-micron iron oxide particles. by Yang Li (7082)

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Examples of different stimuli for all subtasks of the task. by Marcel F. Hinss (14675457)

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Particle size distribution of iron oxide. by Yang Li (7082)

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The St Mary’s Hospital Sleep Questionnaire was used to estimate the sleep quality on the previous night. by Marcel F. Hinss (14675457)

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Relevant parameters of test piece. by Yang Li (7082)

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Graph of wear volume variation for test groups with different particle sizes at two concentrations. by Yang Li (7082)

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The Karolinska Sleepiness Scale (KSS) is a 9-point Likert scale, ranging from “extremely 1 = alert” to “9 = extremely sleepy–fighting sleep” [44]. by Marcel F. Hinss (14675457)

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RTs (in ms, bars) and ACC (in %, line) for each simplified task-rule congruency condition, with 95% confidence interval. by Marcel F. Hinss (14675457)

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(a). Initial microscopic morphology map of test specimen surface. (b). Initial three-dimensional morphology map of test specimen surface. by Yang Li (7082)

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Summary of demographics: Left: Distribution of age; Right: Distribution of handedness as assessed by the EDI [40]. by Marcel F. Hinss (14675457)

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Schema of the experimental procedure. by Marcel F. Hinss (14675457)

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Summary of effects of gender on RT (in ms, bars) and ACC (in %, line), with 95% confidence interval. by Marcel F. Hinss (14675457)

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RTs (in ms, bars) and ACC (in %, line) across different types of task-rule congruency, with 95% confidence interval. by Marcel F. Hinss (14675457)

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RTs (in ms, bars) and ACC (in %, line) across all tasks, with 95% confidence interval. by Marcel F. Hinss (14675457)

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Larger example of stimuli with cue relevant for Task 3. by Marcel F. Hinss (14675457)

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Graphical representation of surface roughness values on the specimen surface after tests conducted at different time intervals (a) Ra, Rq (b) Rz (c) Sa, Sq (d) Sz, Sp, Sv. by Yang Li (7082)

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