Judgment of action capabilities in children at risk for developmental coordination disorder

Johnson, Daniel; Wade, Michael G.

doi:10.1080/09638280600947708

Cited by 16 publications

(8 citation statements)

References 37 publications

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“…In terms of judgements of passability we see a smaller absolute and constant error in the children with DCD compared to their peers. This finding seems to contrast with studies which found less accurate judgements in children with DCD but no clear under-or over-estimation (Johnson & Wade, 2007Chen et al, 2014). A smaller error, as demonstrated in the participants with DCD, suggests that they judge a need for less relative space, i.e.…”

Section: Discussioncontrasting

confidence: 95%

“…However, although perceptual deficits are reported, the relationship with poor motor performance has not been established (Henderson et al ., ). The previous work of Johnson and Wade (, ) would suggest a difficulty in the perception of affordances in these children; however, motor performance on the same tasks was not measured and so it is difficult to determine the relationship between perception and action from these studies. Interestingly some studies have considered the relationship between perceptual judgements and movement control.…”

Section: Introductionmentioning

confidence: 93%

“…In the second part of Experiment 1 we therefore considered the point at which children with DCD stated that they would need to rotate their shoulders to pass through an aperture presented in far space. Previous research focusing on action judgements in children with DCD has suggested that they are not able to make these as accurately as their peers (Johnson & Wade, ) and so in this study we would expect to find less accurate judgements in the participants with DCD compared to the typically developing participants. This will be apparent in terms of a higher degree of absolute error but again no clear under‐ or over‐estimation.…”

Section: Experiments 1: Visual Judgementsmentioning

confidence: 99%

“…Here children are making perceptual judgements regarding action ability and therefore the task is embedded into the perceptionaction cycle. These include the judgement of vertical reaching height and sitting height (Johnson & Wade, 2007), horizontal reaching (Johnson & Wade, 2009) and maximum sitting height with standing height artifically altered (Chen, Tsai & Wu, 2014). In all of these studies children with DCD made less accurate judgements of action capability compared to their peers, with no clear pattern of over-or under-estimation.…”

Section: Introductionmentioning

confidence: 99%

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Navigating through apertures: perceptual judgements and actions of children with Developmental Coordination Disorder

Wilmut

Barnett

2016

Developmental Science

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Passing through a narrow gap/aperture involves a perceptual judgement regarding the size of the gap and an action to pass through. Children with DCD are known to have difficulties with perceptual judgements in near space but whether this extends to far space is unknown. Furthermore, in a recent study it was found that adults with DCD do not scale movements when walking through an aperture in the same way as their peers. The current study, therefore, considered perceptual judgements and motor behaviour of children with DCD while looking at or walking through apertures. Twenty‐nine children with DCD and 29 typically developing (TD) children took part. In Experiment 1, participants completed a perceptual task, where they made passability judgements. Children with DCD showed a significantly smaller critical ratio (aperture size at which a participant first rotates the shoulders to pass through) compared to their TD peers. In Experiment 2, participants completed an action task where they walked through the same apertures. Children with DCD showed a significantly larger critical ratio than TD peers when body size alone was accounted for. Taken together these results suggest that perception within a static context is different from that within a dynamic context for children with DCD. However, despite this difference we have demonstrated a clear relationship between perception and action in children with DCD. A video abstract of this article can be viewed at: https://youtu.be/SABXFrAJtF8

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Section: Discussioncontrasting

confidence: 95%

Section: Introductionmentioning

confidence: 93%

Section: Experiments 1: Visual Judgementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Navigating through apertures: perceptual judgements and actions of children with Developmental Coordination Disorder

Wilmut

Barnett

2016

Developmental Science

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“…Similarly, people with ASDs are worse at adjusting already preplanned movements (Nazarali, Glazebrook, & Elliott, ). Interestingly, perceptual motor integration deficits have also been found for individuals with Developmental Coordination Disorder (DCD); however, the deficits mostly extend to only the actions in which the individuals have difficulty performing (Johnson & Wade, ). Although DCD is often comorbid with ASDs, it is unlikely that these are related due to the notion that individuals with ASD do not have deficits in performing the overt actions.…”

Section: Discussionmentioning

confidence: 99%

A Perceptual–Motor Deficit Predicts Social and Communicative Impairments in Individuals With Autism Spectrum Disorders

et al. 2012

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Individuals with autism spectrum disorders (ASDs) have known impairments in social and motor skills. Identifying putative underlying mechanisms of these impairments could lead to improved understanding of the etiology of core social/communicative deficits in ASDs, and identification of novel intervention targets. The ability to perceptually integrate one's physical capacities with one's environment (affordance perception) may be such a mechanism. This ability has been theorized to be impaired in ASDs, but this question has never been directly tested. Crucially, affordance perception has shown to be amenable to learning; thus, if it is implicated in deficits in ASDs, it may be a valuable unexplored intervention target. The present study compared affordance perception in adolescents and adults with ASDs to typically developing (TD) controls. Two groups of individuals (adolescents and adults) with ASDs and age‐matched TD controls completed well‐established action capability estimation tasks (reachability, graspability, and aperture passability). Their caregivers completed a measure of their lifetime social/communicative deficits. Compared with controls, individuals with ASDs showed unprecedented gross impairments in relating information about their bodies' action capabilities to visual information specifying the environment. The magnitude of these deficits strongly predicted the magnitude of social/communicative impairments in individuals with ASDs. Thus, social/communicative impairments in ASDs may derive, at least in part, from deficits in basic perceptual–motor processes (e.g. action capability estimation). Such deficits may impair the ability to maintain and calibrate the relationship between oneself and one's social and physical environments, and present fruitful, novel, and unexplored target for intervention. Autism Res 2012,5:352–362. © 2012 International Society for Autism Research, Wiley Periodicals, Inc.

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Development of visual control in stepping down

2009

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Stepping down at a change of height is a fundamental part of human locomotion. At a novel step, this requires the transformation of visual information about a depth change into a stepping movement of appropriate size. However, little is known about this process or its development. We studied adults, 3- and 4-year-old children stepping down a single stair of variable height. We assessed how well stepping down was scaled to stair height using several kinematic measures. Of these, 'kneedrop' and 'toedrop' describe how far the leg has descended by the time it begins to 'swing in' in preparation for landing; and 'toeheight (speedpeak)' describes where the toe begins to decelerate. If visually controlled, their values should scale to the height of the stair. Under normal visual conditions, children scaled these movements to stair height as well as adults. In a second condition, participants closed their eyes just before stepping down to remove visual feedback during the step. Adults' steps were barely affected. For 4-year olds, only toeheight (speedpeak) decreased. For 3-year olds, both toedrop and toeheight (speedpeak) scaled less well to stair height than normal. The results suggest that visuomotor processes for fine-tuned stepping control develop remarkably early, but are initially dependent on visual feedback.

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Judgment of action capabilities in children at risk for developmental coordination disorder

Abstract: Compared to a typically developing group, children at risk for DCD made less accurate judgments of the limits of their action capabilities. The accuracy of a perceptual judgment was found to correlate with a related movement skill.

Cited by 16 publications

References 37 publications

Navigating through apertures: perceptual judgements and actions of children with Developmental Coordination Disorder

Navigating through apertures: perceptual judgements and actions of children with Developmental Coordination Disorder

A Perceptual–Motor Deficit Predicts Social and Communicative Impairments in Individuals With Autism Spectrum Disorders

Development of visual control in stepping down

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