In a demanding task, three-handed manipulation is preferred to two-handed manipulation

Elahe Abdi, Etienne Burdet, Mohamed Bouri, Sharifa Himidan, Hannes Bleuler

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Equipped with a third hand under their direct control, surgeons may be able to perform certain surgical interventions alone; this would reduce the need for a human assistant and related coordination difficulties. However, does human performance improve with three hands compared to two hands? To evaluate this possibility, we carried out a behavioural study on the performance of naive adults catching objects with three virtual hands controlled by their two hands and right foot. The subjects could successfully control the virtual hands in a few trials. With this control strategy, the workspace of the hands was inversely correlated with the task velocity. The comparison of performance between the three and two hands control revealed no significant difference of success in catching falling objects and in average effort during the tasks. Subjects preferred the three handed control strategy, found it easier, with less physical and mental burden. Although the coordination of the foot with the natural hands increased trial after trial, about two minutes of practice was not sufficient to develop a sense of ownership towards the third arm.

Original languageEnglish
Article number21758
JournalScientific Reports
Volume6
DOIs
Publication statusPublished - 25 Feb 2016
Externally publishedYes

Cite this

Abdi, Elahe ; Burdet, Etienne ; Bouri, Mohamed ; Himidan, Sharifa ; Bleuler, Hannes. / In a demanding task, three-handed manipulation is preferred to two-handed manipulation. In: Scientific Reports. 2016 ; Vol. 6.
@article{6e4f4864039b4b0d843b1cc45afa1a56,
title = "In a demanding task, three-handed manipulation is preferred to two-handed manipulation",
abstract = "Equipped with a third hand under their direct control, surgeons may be able to perform certain surgical interventions alone; this would reduce the need for a human assistant and related coordination difficulties. However, does human performance improve with three hands compared to two hands? To evaluate this possibility, we carried out a behavioural study on the performance of naive adults catching objects with three virtual hands controlled by their two hands and right foot. The subjects could successfully control the virtual hands in a few trials. With this control strategy, the workspace of the hands was inversely correlated with the task velocity. The comparison of performance between the three and two hands control revealed no significant difference of success in catching falling objects and in average effort during the tasks. Subjects preferred the three handed control strategy, found it easier, with less physical and mental burden. Although the coordination of the foot with the natural hands increased trial after trial, about two minutes of practice was not sufficient to develop a sense of ownership towards the third arm.",
author = "Elahe Abdi and Etienne Burdet and Mohamed Bouri and Sharifa Himidan and Hannes Bleuler",
year = "2016",
month = "2",
day = "25",
doi = "10.1038/srep21758",
language = "English",
volume = "6",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",

}

In a demanding task, three-handed manipulation is preferred to two-handed manipulation. / Abdi, Elahe; Burdet, Etienne; Bouri, Mohamed; Himidan, Sharifa; Bleuler, Hannes.

In: Scientific Reports, Vol. 6, 21758, 25.02.2016.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - In a demanding task, three-handed manipulation is preferred to two-handed manipulation

AU - Abdi, Elahe

AU - Burdet, Etienne

AU - Bouri, Mohamed

AU - Himidan, Sharifa

AU - Bleuler, Hannes

PY - 2016/2/25

Y1 - 2016/2/25

N2 - Equipped with a third hand under their direct control, surgeons may be able to perform certain surgical interventions alone; this would reduce the need for a human assistant and related coordination difficulties. However, does human performance improve with three hands compared to two hands? To evaluate this possibility, we carried out a behavioural study on the performance of naive adults catching objects with three virtual hands controlled by their two hands and right foot. The subjects could successfully control the virtual hands in a few trials. With this control strategy, the workspace of the hands was inversely correlated with the task velocity. The comparison of performance between the three and two hands control revealed no significant difference of success in catching falling objects and in average effort during the tasks. Subjects preferred the three handed control strategy, found it easier, with less physical and mental burden. Although the coordination of the foot with the natural hands increased trial after trial, about two minutes of practice was not sufficient to develop a sense of ownership towards the third arm.

AB - Equipped with a third hand under their direct control, surgeons may be able to perform certain surgical interventions alone; this would reduce the need for a human assistant and related coordination difficulties. However, does human performance improve with three hands compared to two hands? To evaluate this possibility, we carried out a behavioural study on the performance of naive adults catching objects with three virtual hands controlled by their two hands and right foot. The subjects could successfully control the virtual hands in a few trials. With this control strategy, the workspace of the hands was inversely correlated with the task velocity. The comparison of performance between the three and two hands control revealed no significant difference of success in catching falling objects and in average effort during the tasks. Subjects preferred the three handed control strategy, found it easier, with less physical and mental burden. Although the coordination of the foot with the natural hands increased trial after trial, about two minutes of practice was not sufficient to develop a sense of ownership towards the third arm.

UR - http://www.scopus.com/inward/record.url?scp=84959386322&partnerID=8YFLogxK

U2 - 10.1038/srep21758

DO - 10.1038/srep21758

M3 - Article

VL - 6

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

M1 - 21758

ER -