“…In keeping with the theory of stochastic resonance, other studies have used various methods to individualize the amplitude to participants. This has been done by testing an array of amplitudes and choosing the amplitude that improves standing sway measures the most ( Mulavara et al, 2011 ; Iwasaki et al, 2014 , 2018 ; Mulavara et al, 2015 ; Fujimoto et al, 2016 , 2018 ; Asslander et al, 2021 ; Chen et al, 2021 ), or by calculating amplitude at a percentage of the cutaneous sensory threshold ( Wuehr et al, 2016a , b ; Piccolo et al, 2020 ; Lotfi et al, 2021 ; Mitsutake et al, 2022 ) or a percentage of the vestibular (motion) threshold of 1 Hz sinusoidal GVS stimulation, to determine the optimum signal ( Goel et al, 2015 ; Mulavara et al, 2015 ; Samoudi et al, 2015 ; Temple et al, 2018 ; Piccolo et al, 2020 ; Sprenger et al, 2020 ).…”