Flexibly weighted integration of tactile reference frames

Badde, Stephanie; Röder, Brigitte; Heed, Tobias

doi:10.1016/j.neuropsychologia.2014.10.001

Cited by 44 publications

(68 citation statements)

References 38 publications

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“…This modulation, independent of its direction, is incompatible with the notion of automaticity. In line with this finding, TOJ crossing effects have been shown to be modulated by processing load as well as by the task instructions in a second, independent task (Badde et al, 2015). To reconcile these results, we have previously suggested Badde et al, 2015) that the first step of tactile localization, stimulus remapping, proceeds automatically.…”

Section: Weighted Integration Accounts For Previous Findingsmentioning

confidence: 62%

“…These so-called crossing effects in temporal order judgments (TOJ) are thought to arise from conflicting leftright mappings in the different spatial reference frames (Yamamoto & Kitazawa, 2001a;2001b;Shore et al, 2002;Röder et al, 2004;Schicke & Röder, 2006;Heed et al, 2012;Heed & Azañón, 2014;Azañón et al, 2015). However, it is unclear whether this conflict bears on the remapping process, impairing the establishment of the external response mapping (Yamamoto & Kitazawa, 2001a;Röder et al, 2004;Kóbor et al, 2006;Azañón & Soto-Faraco, 2007;Kitazawa et al, 2008), or whether it unfolds its effect at the stage of information integration once remapping is complete (Shore et al, 2002;Badde et al, 2013;Badde et al, 2015). Additionally, it has been suggested that crossing effects might simply be caused by the additional demands of the unusual, presumably uncomfortable crossed posture (Azañón et al, 2010b;Longo et al, 2010;Haggard et al, 2003) or by additional hemispheric transmission costs, which are specific to the crossed posture (Buchholz et al, 2012;Canzoneri et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Integration of anatomical and external response mappings explains crossing effects in tactile localization: A probabilistic modeling approach

2015

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To act upon a tactile stimulus its original skinbased, anatomical spatial code has to be transformed into an external, posture-dependent reference frame, a process known as tactile remapping. When the limbs are crossed, anatomical and external location codes are in conflict, leading to a decline in tactile localization accuracy. It is unknown whether this impairment originates from the integration of the resulting external localization response with the original, anatomical one or from a failure of tactile remapping in crossed postures. We fitted probabilistic models based on these diverging accounts to the data from three tactile localization experiments. Hand crossing disturbed tactile left-right location choices in all experiments. Furthermore, the size of these crossing effects was modulated by stimulus configuration and task instructions. The best model accounted for these results by integration of the external response mapping with the original, anatomical one, while applying identical integration weights for uncrossed and crossed postures. Thus, the model explained the data without assuming failures of remapping. Moreover, performance differences across tasks were accounted for by non-individual parameter adjustments, indicating that individual participants' task adaptation results from one common functional mechanism. These results suggest that remapping is an automatic and accurate process, and that the observed localization impairments in touch result from a cognitively controlled integration process that combines anatomically and externally coded responses.

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Section: Weighted Integration Accounts For Previous Findingsmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Integration of anatomical and external response mappings explains crossing effects in tactile localization: A probabilistic modeling approach

2015

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“…For instance, TOJ crossing effects are comparable when same or different fingers of each hand are stimulated (Shore et al, 2002), or even when stimuli are applied to one hand and to one foot, while they are crossed with each other (Schicke & Roder, 2006). Moreover, the effect of crossing the arms when stimuli differs in frequency or duration is comparable to any standard crossing effect (see Figures 2 and 6 in Roberts & Humphreys, 2008; though see Badde, Röder, et al, 2015, where TOJ crossing effects are reduced when location, but also non-spatial characteristics of the stimuli, are reported in a dual task). These results are quite surprising, as one could imagine solving the task using the identity of the body part, the frequency or the duration of the stimulus that has been stimulated first.…”

Section: Discussionmentioning

confidence: 89%

“…The hand crossing effect has been suggested to result, amongst other models, from either an impairment of coordinate transformation (Yamamoto & Kitazawa, 2001) or a conflict in the integration of disparate spatial information (Badde et al, 2016;Badde, Röder, & Heed, 2015;Heed et al, 2015). Regardless of the interpretation of the origin of the effect, all these studies assume that the deficit indexes an automatic triggering of spatial transformations during tactile processing.…”

Section: Introductionmentioning

confidence: 99%

A three-dimensional spatial characterization of the crossed-hands deficit

2016

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To perceive the location of touch in space, we integrate information about skin-location with information about the location of that body part in space. Most research investigating this process of tactile spatial remapping has used the so-called crossed-hands deficit, in which the ability to judge the temporal order of touches on the two hands is impaired when the arms are crossed. This posture induces a conflict between skin-based and tactile external spatial representations, specifically in the left-right dimension. Thus, it is unknown whether touch is affected by posture when spatial relations other than the right-left dimension are available. Here, we tested the extent to which the crossed-hands deficit is a measure of tactile remapping, reflecting tactile encoding in continuous three-dimensional space. Participants judged the temporal order of tactile stimuli presented to crossed and uncrossed hands. The arms were placed at different elevations (up-down dimension; Experiments 1 and 2), or at different distances from the body in the depth plane (nearfar dimension; Experiment 3). The crossed-hands deficit was reduced when other sources of spatial information, orthogonal to the left-right dimension, were available. Nonetheless, the deficit persisted in all conditions, even when processing of non-conflicting information was enough to solve the task. Together, these results demonstrate that the processing underlying the crossed-hands deficit is related to the encoding of tactile localization in three-dimensional space, rather than related uniquely to the cost of processing information in the right-left dimension. Furthermore, the persistence of the crossing effect provides evidence for automatic integration of all available information, regardless of whether or not it is conflicting.3

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“…For instance, both sighted and blind people rely onto an external FoR for coordinating bimanual movements such as finger tapping and finger oscillation . Additionally, it has been shown that also sighted people tend to rely on different FoRs to estimate the location of a tactile stimulus depending on the salience of a particular frame of reference (external or anatomical) in a secondary task (Badde, Röder & Heed, 2014). In the case of action control and spatial localization of stimuli, different frames of reference appear to be deployed flexibly on the basis of task requirements; the same may be true when spatial schemas are used to represent abstract concepts.…”

Section: Discussionmentioning

confidence: 99%