This dataset contains the raw data collected during psychophysical studies into the effect of surface area of pressure by a soft actuator on the lower and upper arm. The data was collected during two psychophysical studies in the lab where participants placed their arm in a motorized ribbon set-up which contracted to present participants with pressure stimuli of various forces and surface area. Participants wore noise-canceling headphones and a barrier prevented them from seeing their arm in the set-up. Participants indicated whether they felt the stimulus or not. The data of the firststudy was logged in.txt files using Processing and can be found in the Pilot_Left_Rigt.zip. The second study was logged by psychopy in a .txt file and a .nmpy file for each participant.