Biases in visuo-haptic matching of curvature

Haptic perception is mediated by tactile (skin-surface stimulation) and kinesthetic (perception of movement indicating limb position) inputs. In a recognition experiment, participants were asked to match stimuli of different curvatures to those in a visual choice set. They used tactile-only information, kinesthesis-only information, and a combination of both. Movements were either self-generated or passively-guided. The experiment showed that judgements based on self-generated kinesthetic information were more accurate than those based on tactile-only information.