Perceptual Factors Influence Visual Search for Meaningful Symbols in Individuals With Intellectual Disabilities and Down Syndrome or Autism Spectrum Disorders

Wilkinson, Krista M.; McIlvane, William J.

doi:10.1352/1944-7558-118.5.353

Cited by 29 publications

(25 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wilkinson and McIlvane showed that children with ASD performed better with the colour‐based clustering method in search and match experiments rather than specifying one colour in a pattern. A case has also been reported linking colour‐processing differences to obsession and phobia .…”

Section: Visual Impairments In Asdmentioning

confidence: 99%

Visual function in autism spectrum disorders: a critical review

Bakroon

Lakshminarayanan

2016

Clinical and Experimental Optometry

View full text Add to dashboard Cite

Studies have shown considerable evidence of visual dysfunction in autism spectrum disorders. Anomalies in visual information processing can have a major effect on the life quality of individuals with autism spectrum disorders. We summarise the hypotheses and theories underlying neural aetiologies and genetic factors that cause these disorders, as well as the possible influences of unusual sensory processing on the communications and behaviour characterised by the autistics. In particular, we review the impact of these dysfunctions on visual performance.

show abstract

Section: Visual Impairments In Asdmentioning

confidence: 99%

Visual function in autism spectrum disorders: a critical review

Bakroon

Lakshminarayanan

2016

Clinical and Experimental Optometry

View full text Add to dashboard Cite

show abstract

“…as aaC apps rapidly evolve, studies are needed to evaluate the efficacy of these apps and to compare mobile aaC apps and more traditional aaC systems . in addition, although SGDs have frequently presented icons in grid array formats (Wilkinson & Mcilvane, 2013), newer formats, such as visual scene displays, have been introduced. These displays use contextual scenes in the form of photographs or drawings to present in-context concepts (Wilkinson & Jagaroo, 2004).…”

Section: Expansion Of Research In Mobile Technologiesmentioning

confidence: 99%

AAC Interventions for Individuals with Autism Spectrum Disorders: State of the Science and Future Research Directions

Ganz

2015

Augmentative and Alternative Communication

122

View full text Add to dashboard Cite

Augmentative and alternative communication (AAC) provides a means of effective communication to individuals with autism spectrum disorder (ASD), many of whom are unable to use conventional speech effectively. The purposes of this article are (a) to summarize and synthesize the last few decades of research on the use of AAC with people with ASD; (b) to indicate implications of this research for stakeholders such as people with ASD, their family members, and educators with whom they work; and (c) to outline priorities for future research to improve communication and other outcomes for individuals with ASD and their loved ones. People with ASD stand to greatly benefit from AAC, particularly with current AAC technologies, as described in this article.

show abstract

“…Previous research (Wilkinson & McIlvane, 2013;Wilkinson, O'Neill, & McIlvane, 2014;Liang et al, 2018) has demonstrated that the different conditions presented participants with varied cognitive-perceptual requirements (Figure 1). In the control condition, only one symbol was shown, requiring neither memory of the previously displayed stimulus nor visual scanning of competing stimuli.…”

Section: Introductionmentioning

confidence: 96%

Cognitive-perceptual load modulates hand selection in left-handers to a greater extent than in right-handers

2018

Self Cite

View full text Add to dashboard Cite

Previous studies have proposed that selecting which hand to use for a reaching task appears to be modulated by a factor described as "task difficulty," defined by either the requirement for spatial precision or movement sequences. However, we previously reported that analysis of the movement costs associated with even simple movements plays a major role in hand selection. We further demonstrated, in right-handers, that cognitive-perceptual loading modulates hand selection by interfering with the analysis of such costs. It has been reported that left-handers tend to show less dominant-hand bias in selecting which hand to use during reaching. We therefore hypothesized that hand selection would be less affected by cognitive-perceptual loading in left-handers than in right-handers. We employed a visual search task that presented different levels of difficulty (cognitive-perceptual load), as established in previous studies. Our findings indicate that lefthanded participants tend to show greater modulation of hand selection by cognitive-perceptual loading than right-handers. Left-handers showed lower dominant hand reaction times than righthanders, and greater high-cost movements that reached to extremes of the contralateral workspace under the most difficult task conditions. We previously showed in this task that midline-crossing has high-energy and time costs and that they occur more frequently under cognitively demanding conditions. The current study revealed that midline-crossing was associated with the lowest reaction times, in both handedness groups. The fact that left-handers showed lower dominant hand reaction times, and a greater number of high-cost cross-midline reaches under the most cognitively demanding conditions suggests that these actions were erroneous.

show abstract

Perceptual Factors Influence Visual Search for Meaningful Symbols in Individuals With Intellectual Disabilities and Down Syndrome or Autism Spectrum Disorders

Cited by 29 publications

References 31 publications

Visual function in autism spectrum disorders: a critical review

Visual function in autism spectrum disorders: a critical review

AAC Interventions for Individuals with Autism Spectrum Disorders: State of the Science and Future Research Directions

Cognitive-perceptual load modulates hand selection in left-handers to a greater extent than in right-handers

Contact Info

Product

Resources

About