Figure 2
From: Relative posture between head and finger determines perceived tactile direction of motion
Presentation of tactile stimuli to participants. (a) In each trial, the participant visually fixated on a cross symbol displayed at the center of the screen for 1 second. Stimulus motion, chosen from one of 24 different directions, was then presented to the participant’s fingerpad for 1 second. After tactile stimulation, the participant reported the perceived direction of motion by performing a mouse click at a position corresponding to the perceived direction on a circle presented on the screen. The inter-trial interval was set as 1 second. (b) The trials were performed using a block design consisting of factorial combinations of three head postures (θH = [120°, 90°, 60°]) and four finger postures (θF = [90°, 60°, 30°, 0°]); yielding a total of 12 posture combinations.
