Table 6. Recommendations on key elements in the future study.

Recommendation	Key elements
Data collection	Clearly describe: ❖ type of subject ❖ number of subjects ❖ type of device ❖ electrode montage ❖ number of channels (location) ❖ sample rate.
Stimulation paradigm	Clear describe: ❖ type of paradigm ❖ executions of each trial ❖ entire experimental produce
Vibrotactile control	Clear describe and justify reasons for the choices, if any: ❖ vibration location ❖ vibration frequency and intensity ❖ vibration number ❖ on-time ❖ off-time ❖ type of tactors
EEG signal processing	Clear describe and justify reasons for the choices, if any: ❖ type of filter ❖ artifact removal techniques (equations, if any) ❖ based-line correction (equations if any) ❖ feature extraction (equations if any) ❖ classification model (equations if any)
Reported Performance	Clearly describe: ❖ performance metrics (equations if any) ❖ evaluation setting (offline or online, cross-validating or training-testing, and subject-independent or subject-dependent)