Tactile-Based Pantomime Grasping: Knowledge of Results is Not Enough to Support an Absolute Calibration. Issue 1 (2nd January 2019)

• Record Type: Journal Article
• Authors: Heath, Matthew; Chan, Jillian; Davarpanah Jazi, Shirin
• Is Part Of: Journal of motor behavior. Volume 51:Issue 1(2019)
• Page Start: 10
• Page End: 18
• Publication Date: 2019-01-02
• Subjects: feedback -- grasping -- haptic -- pantomime -- tactile -- Weber's law; Human mechanics -- Periodicals; Movement, Psychology of -- Periodicals; Motor Activity -- Periodicals; Motor Skills -- Periodicals; Bewegingsleer; Mécanique humaine -- Périodiques; Psychomotricité -- Périodiques; 612.705
• DOI: 10.1080/00222895.2017.1408559
• Languages: English
• ISSNs: 0022-2895

Abstract

ABSTRACT: Tactile-based pantomime-grasping requires that a performer use their right hand to 'grasp' a target previously held in the palm of their opposite hand – a task examining how mechanoreceptive (i.e., tactile) feedback informs the motor system about an object property (i.e., size). Here, we contrasted pantomime-grasps performed with (H+) and without (H−) haptic feedback (i.e., thumb and forefinger position information derived from the grasping hand touching the object) with a condition providing visual KR (VKR) related to absolute target object size. Just-noticeable-difference (JND) scores were computed to determine whether responses adhered to – or violated – Weber's law. JNDs for H+ trials violated the law, whereas H− and VKR trials adhered to the law. Accordingly, results demonstrate that haptic feedback – and not KR – supports an absolute tactile-haptic calibration.