A Radial Zoom Motion-Based Paradigm for Steady State Motion Visual Evoked Potentials

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Paper

Link: https://www.frontiersin.org/articles/10.3389/fnhum.2019.00127/full
Year: 2019

Summary

radial zoom motion-based SSMVEP paradigm achieves slightly lower accuracy than flicker, but its comfort score and fatigue score is much better than flicker stimulus.

Methods

• 8 subjects
• 8 targets, frequency of 8–15Hz and frequency interval of 1 Hz
• 40 trials with five trials for each target
• tested on 6 stimulus types, test accuracy, ITR, comfort and fatigue
• foveal test, red “+” symbol appeared randomly at the location of the stimulus target for a duration of 0.5 s, then the block of the corresponding position was presented for 4s

Results

• the half harmonic component induced by SSMVEP was significant
• Due to the depth perception of the human eye (Chang et al., 2014), the zoom motion paradigm causes a space movement sensation
• Newton’s ring motion may not be suitable for a multiple target BCI system, may be related to its complicated graphic and motion patterns