Feeling a Touch to the Hand on the Foot

Badde, Stephanie; Röder, Brigitte; Heed, Tobias

doi:10.1016/j.cub.2019.02.060

Cited by 48 publications

(73 citation statements)

References 54 publications

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“…The reason for the apparent contradiction between previous research and these new findings stems from the fact that typical experimental designs, in which tactile stimuli are presented to the two stationary hands, do not allow disentangling the prevailing view of crossing effects indicating conflict between tactile anatomical and (precise) spatial stimulus location from the view that the conflict apparent in limb crossing must indicate other spatial aspects, such as those identified in our previous study (Badde et al, 2019). Thus, limb crossing paradigms that require limb choices about the origin of touch likely reflect the integration of categorical, tactile-spatial stimulus features.…”

Section: Discussioncontrasting

confidence: 94%

“…Moreover, an account based on time confusion is specific to the TOJ paradigm, in which participants compare two stimuli. In contrast, a feature-based account generalizes to other experimental paradigms, including ones that present only a single tactile stimulus (Azañón et al, 2010;Azañón & Soto-Faraco, 2008;Badde et al, 2015Badde et al, , 2019).…”

Section: Discussionmentioning

confidence: 99%

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External location of touch is constructed post-hoc based on limb choice

Maij

Seegelke

Medendorp

et al. 2019

Preprint

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150 words) 1 When humans indicate on which hand a tactile stimulus occurred, they often 2 err when their hands are crossed. This finding seemingly supports the view that 3 the automatically determined touch location in external space affects limb 4 assignment: the crossed right hand is localized in left space, and this conflict 5 presumably provokes hand assignment errors. Here, participants judged on which 6 hand the first of two stimuli, presented during a bimanual movement, had occurred, 7 and then indicated its external location by a reach-to-point movement. When 8 participants incorrectly chose the hand stimulated second, they pointed to where 9 that hand had been at the correct, first time point, though no stimulus had occurred 10 at that location. This behavior suggests that stimulus localization depended on 11 hand assignment, not vice versa. It is, thus, incompatible with the notion of 12 automatic computation of external stimulus location upon occurrence. Instead, 13 humans construct external touch location post-hoc and on demand.

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Section: Discussioncontrasting

confidence: 94%

Section: Discussionmentioning

confidence: 99%

External location of touch is constructed post-hoc based on limb choice

Maij

Seegelke

Medendorp

et al. 2019

Preprint

Self Cite

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“…Under these conditions, remapping of touch would be indicated by sustained contextual cueing when the external coordinates of the tactile distractors are preserved while their anatomical locations are changed (a prediction derived from, e.g., Badde et al, 2014Badde et al, , 2015. Of note in this context, the relation between hand crossing and external coding of touch has recently been doubted (Badde, Röder, & Heed, 2019;Azañón & Longo, 2019), so that the hand flipping introduced in Experiment 3 might well have been the more appropriate manipulation. Another question concerns whether spatial regularities learned in the visual modality could also come to facilitate tactile search.…”

Section: Discussionmentioning

confidence: 99%

Crossmodal learning of target-context associations: When would tactile context predict visual search?

Chen¹,

Shi²,

Zang

et al. 2019

Atten Percept Psychophys

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It is well established that statistical learning of visual target locations in relation to constantly positioned visual distractors facilitates visual search. In the present study, we investigated whether such a contextual-cueing effect would also work crossmodally, from touch onto vision. Participants responded to the orientation of a visual target singleton presented among seven homogenous visual distractors. Four tactile stimuli, two to different fingers of each hand, were presented either simultaneously with or prior to the visual stimuli. The identity of the stimulated fingers provided the crossmodal context cue: in half of the trials, a given visual target location was consistently paired with a given tactile configuration. The visual stimuli were presented above the unseen fingers, ensuring spatial correspondence between vision and touch. We found no evidence of crossmodal contextual cueing when the two sets of items (tactile, visual) were presented simultaneously (Experiment 1). However, a reliable crossmodal effect emerged when the tactile distractors preceded the onset of visual stimuli 700 ms (Experiment 2). But crossmodal cueing disappeared again when, after an initial learning phase, participants flipped their hands, making the tactile distractors appear at different positions in external space while their somatotopic positions remained unchanged (Experiment 3). In all experiments, participants were unable to explicitly discriminate learned from novel multisensory arrays. These findings indicate that search-facilitating context memory can be established across vision and touch. However, in order to guide visual search, the (predictive) tactile configurations must be remapped from their initial somatotopic into a common external representational format.

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“…For instance, when participants' crossed hands are successively stimulated, they make more errors in judging which of both hands has been touched first (temporal order judgment [TOJ]) compared to when their hands are uncrossed [Shore, Spry, & Spence, ; Yamamoto & Kitazawa, ]. Presumably, this “crossed hands effect” mirrors the relative weighting of anatomical and external‐spatial codes [Badde, Heed, & Röder, , ; Heed & Azañón, ]: a touch to a hand not only activates the touched hand, but also the side of external space surrounding its body side, that is, its canonical external‐spatial location [Badde, Röder, & Heed, ]. When the hands are uncrossed, this external‐spatial code provides additional evidence toward the correct response.…”

Section: Introductionmentioning

confidence: 99%

“…In some cases, individuals who do not rely on externalspatial representations in a unimodal tactile context such as the TOJ task, show an influence of posture on touch processing in cross-modal contexts [Ley, Bottari, Shenoy, Kekunnaya, & Röder, 2013;Röder, Kusmierek, Spence, & Schicke, 2007]. The tactile TOJ-task could be solved independent of external-spatial codes [Badde et al, 2019]. In contrast, cross-modal interactions, such as of tactile and visual information, might only be possible within an external reference frame [Spence, Nicholls, Gillespie, & Driver, 1998].…”

Section: Introductionmentioning

confidence: 99%

Visual and Proprioceptive Influences on Tactile Spatial Processing in Adults with Autism Spectrum Disorders

et al. 2019

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Children with autism spectrum disorders (ASDs) often exhibit altered representations of the external world. Consistently, when localizing touch, children with ASDs were less influenced than their peers by changes of the stimulated limb's location in external space [Wada et al., Scientific Reports 2015, 4(1), 5985]. However, given the protracted development of an external‐spatial dominance in tactile processing in typically developing children, this difference might reflect a developmental delay rather than a set suppression of external space in ASDs. Here, adults with ASDs and matched control‐participants completed (a) the tactile temporal order judgment (TOJ) task previously used to test external‐spatial representation of touch in children with ASDs and (b) a tactile‐visual cross‐modal congruency (CC) task which assesses benefits of task‐irrelevant visual stimuli on tactile localization in external space. In both experiments, participants localized tactile stimuli to the fingers of each hand, while holding their hands either crossed or uncrossed. Performance differences between hand postures reflect the influence of external‐spatial codes. In both groups, tactile TOJ‐performance markedly decreased when participants crossed their hands and CC‐effects were especially large if the visual stimulus was presented at the same side of external space as the task‐relevant touch. The absence of group differences was statistically confirmed using Bayesian statistical modeling: adults with ASDs weighted external‐spatial codes comparable to typically developed adults during tactile and visual‐tactile spatio‐temporal tasks. Thus, atypicalities in the spatial coding of touch for children with ASDs appear to reflect a developmental delay rather than a stable characteristic of ASD. Autism Res 2019, 12: 1745–1757. © 2019 International Society for Autism Research, Wiley Periodicals, Inc. Lay Summary A touched limb's location can be described twofold, with respect to the body (right hand) or the external world (right side). Children and adolescents with autism spectrum disorder (ASD) reportedly rely less than their peers on the external world. Here, adults with and without ASDs completed two tactile localization tasks. Both groups relied to the same degree on external world locations. This opens the possibility that the tendency to relate touch to the external world is typical in individuals with ASDs but emerges with a delay.

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Feeling a Touch to the Hand on the Foot

Cited by 48 publications

References 54 publications

External location of touch is constructed post-hoc based on limb choice

External location of touch is constructed post-hoc based on limb choice

Crossmodal learning of target-context associations: When would tactile context predict visual search?

Visual and Proprioceptive Influences on Tactile Spatial Processing in Adults with Autism Spectrum Disorders

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