Ambiguous visuo-haptic integration in a teleoperation environment
Year: 2025
Type: conference-paper
Abstract: Human agents have been shown to integrate visual and haptic information in a statistically-optimal fashion, by weighting each information by its reliability. So far, previous experiments had always added noise to the visual cues, in order to equalize visual reliability (high) with haptic (low) reliability. The present study aims to further characterize the rules of multisensory integration, by varying visual and haptic reliabilities. To that aim, we will ask healthy adults (target n = 10) to perform a psychometric size-discrimination task. Visual, haptic, and visuo-haptic objects (rectangular 3D shapes) will be presented by means of a simulated visual environment (computer screen) and a haptic interface (Omega 7.0). Participants will be presented two successive objects, a standard stimulus (width: 64 mm) and a comparison stimulus (width: standard ± 1, 2, 3, 5, 8 mm), and will be asked to estimate which object is the largest. Cue reliabilities will be manipulated using visual sharpness (normal vs blurred) and haptic stiffness (“hard” [3000 N/m] vs. “soft” [1000 N/m]), respectively. Visuo-haptic conflicts (-2, 0, +2 mm) will be used to induce sensory reweighting. According to pilot observations, visuo-haptic noises tend to increase the JND measurements. Data collection will take place in March-April. The main experiment will test whether visuo-haptic integration is optimal for the different combinations of noisy and non-noisy unimodal cues.
Source: HAL
Authors: Lafitte, Rémi, Vulliez, Margot, Scotto, Cécile
Language: English
Subfield: Experimental and Cognitive Psychology
Field: Psychology
Domain: Social Sciences
Open Access status: green
OpenAlex ID: W7206832003