Vibrotactile Perception for Sensorimotor Augmentation: Perceptual Discrimination of Vibrotactile Stimuli Induced by Low-Cost Eccentric Rotating Mass Motors at Different Body Locations in Young, Middle-Aged, and Older Adults.

Although measured intensity discrimination thresholds tended to be lower (and acuity higher) for sequentially-presented stimuli than for simultaneously-presented stimuli (sequential: 51.28 Hz ± 21.77; simultaneous: 59.48 Hz ± 28.85), this difference did not quite reach statistical significance after RT-INT transformation (F 1, 224 = 2.92, p = 0.089).

also in 679 other papers

We speculated that one possible reason why timing-related effects did not reach statistical significance in Experiment 1 might have stemmed from the fact that approximately half of the subjects in that experiment were not naïve to vibrotactile discrimination, having had previously participated in similar sensory discrimination studies.

also in 111,027 other papers