Figure 1
From: Tactile perception of pleasantness in relation to perceived softness
Stimuli and stimulus presentation. A We used 9 stimuli made of polyurethane rubbers. To minimise tackiness, baby powder (corn starch) was placed on the surface of the stimuli. B Compliance of each stimulus was defined by calculating slopes fit to patterns of displacement as a function of applied force. Value for each line indicates the compliance for each stimulus. C Participants used their right hands with their fingers facing upward, supported by Styrofoam and a roll of felt. The customised apparatus moved at 5 cm/s and pushed against the participants’ index, middle, and ring fingers until the force reached the specified maximum value (5 N or 20 N).
