Haptic communication optimises joint decisions and affords implicit confidence sharing

Group decisions can outperform the choices of best individual group members. Previous research suggested that optimal require individuals to communicate explicitly (e.g., verbally) their confidence levels. Our study addresses untested hypothesis implicit communication using a sensorimotor channel -- haptic coupling may afford decisions, too. We report haptically coupled dyads solve perceptual discrimination task more accurately than members; and five times faster explicit communication. Furthermore, our computational analyses indicate affords sharing. found take leadership over choice in it by modulating both timing force movements. findings pave way negotiation technologies fast problems groups.