: Perception and action are essential in our day-to-day interactions with the environment. Despite the dual-stream theory of action and perception, it is now accepted that action and perception processes interact with each other. However, little is known about the impact of unpredicted changes of target size during grasping actions on perception. We assessed whether size perception and saccade amplitude were affected before and after grasping a target that changed its horizontal size during the action execution under the presence or absence of tactile feedback. We have tested twenty-one participants in 4 blocks of 30 trials. Blocks were divided into two experimental tactile feedback paradigms: tactile and non-tactile. Trials consisted of 3 sequential phases: pre-grasping size perception, grasping, and post-grasping size perception. During pre- and post-phases, participants executed a saccade towards a horizontal bar and performed a manual size estimation of the bar size. During grasping phase, participants were asked to execute a saccade towards the bar and to make a grasping action towards the screen. While grasping, 3 horizontal size perturbation conditions were applied: non-perturbation, shortening, and lengthening. 30% of the trials presented perturbation, meaning a symmetrically shortened or lengthened by 33% of the original size. Participants' hand and eye positions were assessed by a motion capture system and a mobile eye-tracker, respectively. After grasping, in both tactile and non-tactile feedback paradigms, size estimation was significantly reduced in lengthening (p = 0.002) and non-perturbation (p<0.001), whereas shortening did not induce significant adjustments (p = 0.86). After grasping, saccade amplitude became significantly longer in shortening (p<0.001) and significantly shorter in lengthening (p<0.001). Non-perturbation condition did not display adjustments (p = 0.95). Tactile feedback did not generate changes in the collected perceptual responses, but horizontal size perturbations did ...


    Access

    Download


    Export, share and cite



    Title :

    Horizontal target size perturbations during grasping movements are described by subsequent size perception and saccade amplitude



    Publication date :

    2022-01-01



    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Classification :

    DDC:    629 / 796



    Rapid monocular adaptation of saccade amplitude in constant strabismus

    Griffiths, H. J. / Buckley, D. / Whittle, J. P. et al. | British Library Conference Proceedings | 2004


    Real-time visual tracking system suggested by saccade and pursuit eye movements

    Takeuchi, Y. / Wang, Z.-F. / Ohnishi, N. et al. | British Library Online Contents | 1997


    Teaching grasping points using natural movements

    Isleyici, Yalim / Alenyà Ribas, Guillem | BASE | 2015

    Free access

    Teaching grasping points using natural movements

    Işleyici, Yalim / Alenyà, Guillem | BASE | 2015

    Free access

    Exploiting eye-hand coordination to detect grasping movements

    Carrasco, M. / Clady, X. | British Library Online Contents | 2012