Fig 1.
Schematic explanation of the vergence and task design.
A: The eyes focus on a single point in space where the angle of vergence (alpha) relates to the distance of the focus point to the eyes. B: Illustration of the task and stimulus presentation times. C: Face images use in the task.
Fig 2.
Average modulation across all conditions (cue and no-cue) of the angle of vergence during the time of a trial.
Black/red trace denotes average angle of eye vergence from control/ADHD subjects. The grey shaded bars indicate the time periods for data analysis as explained in the main text. Phases in the task are demarcated by vertical dashed lines (F denotes fixation period and S the stimulus period). Horizontal dashed line indicates vergence angle belonging to the estimated screen distance.
Fig 3.
Average size of angle of eye vergence.
Average (across all subjects) size of angle of vergence in the informative cue and uninformative cue conditions over time for the control group (A) and the ADHD group (B). Shaded areas represent ±1 times SEM around the mean. Dotted vertical lines indicate the time of target (face emotion) presentation. Horizontal dashed line indicates vergence angle belonging to the estimated screen distance.
Fig 4.
Mean sizes of angle of vergence for the different cue conditions (A) and the difference herein (B).
Bars denote control/ADHD group. Error bars are SEM. Asterisks denote statistical significance. NS = not significant.
Fig 5.
Mean sizes of angle of vergence for the different face conditions.
Bars denote 2/4 face condition. Error bars are SEM. Asterisks denote statistical significance. NS = not significant.
Fig 6.
Eye positions of both eyes separately during the experiment.
Traces represent the eye positions of time from cue stimulus onset until 1000ms after target presentation. Cross represents the approximate size of the fixation cross. Right eye and left eye positions are plotted on top of each other in different shadings of grey.