Table 2 Effects of sign comprehensibility on investigated physiological measures from eye tracking and EEG data (p values less than 0.05 are shown in italics)
From: Eye movements and brain oscillations to symbolic safety signs with different comprehensibility
Physiological data | Measures | p value of two-group comparison (good signs vs. bad signs) | |
|---|---|---|---|
Eye tracking | Blink rate | <0.001 (+) | |
Pupil diameter | 0.002 (−) | ||
Time to first fixation | <0.001 (+) | ||
EEG | |||
Prefrontal cortex (F3, F4) | Channel F3 | Delta power | 0.401 |
Theta power | 0.002 (+) | ||
Alpha power | 0.002 (+) | ||
Gamma power | 0.006 (−) | ||
Channel F4 | Delta power | 0.355 | |
Theta power | <0.001 (+) | ||
Alpha power | <0.001 (+) | ||
Gamma power | 0.001 (−) | ||
Visual cortex (O1, O2) | Channel O1 | Delta power | 0.996 |
Theta power | 0.102 | ||
Alpha power | <0.001 (+) | ||
Gamma power | <0.001 (+) | ||
Channel O2 | Delta power | 0.233 | |
Theta power | 0.189 | ||
Alpha power | <0.001 (+) | ||
Gamma power | <0.001 (+) | ||
Auditory cortex (T7, T8) | Channel T7 | Delta power | 0.906 |
Theta power | 0.445 | ||
Alpha power | 0.407 | ||
Gamma power | 0.888 | ||
Channel T8 | Delta power | 0.646 | |
Theta power | 0.470 | ||
Alpha power | 0.472 | ||
Gamma power | 0.726 | ||