The effect of visual perceptual load on auditory awareness in autism spectrum disorder

Ideational Praxis, Play, and Playfulness: A Cross-Sectional Study of Autistic Children

IMPORTANCE

Assessment of praxis skills is an essential aspect of understanding autistic children's development of play and playfulness.

OBJECTIVE

To assess the relationship and influence of ideational praxis skills on play skills and playfulness among autistic children.

DESIGN

A cross-sectional study.

SETTINGS

Homes, schools, and early care centers across Spain.

PARTICIPANTS

Children ages 4 yr 6 mo to 6 yr 11 mo (45 typically developing [TP] and 45 with autism spectrum disorder [ASD]).

OUTCOMES AND MEASURES

Student's t tests were used to compare means between the two groups. Pearson's correlation and multiple linear regression were used to determine possible effects of ideational skills on play and playfulness.

RESULTS

Scores for the TP group were significantly higher than those of the ASD group on all play dimensions-space management, t(88) = 4.58; material management, t(88) = 5.86; pretense-symbolism, t(88) = 8.12; and participation, t(88) = 7.31-and on the Test of Playfulness (ToP), t(88) = 10.18, and Test of Ideational Praxis (TIP), t(88) = 4.38 (all ps < .001). Multiple linear regression revealed a statistically significant effect of TIP dimensions-space management, F(3, 41) = 4.83, p < .042; material management, F(3.41) = 8.49. p < .001; pretense-symbolism, F(3, 41) = 5.66. p < .002; and participation, F(3.41) = 7.81. p < .001-and on the ToP, F(3, 41) = 5.96. p < .002.

CONCLUSIONS AND RELEVANCE

Ideational praxis skills combined with diagnostic information significantly predicted play skills and playfulness, highlighting the influence of ideation on play. Plain-Language Summary: This article provides data supporting the influence of ideational praxis skills on the play skills and playfulness of autistic children. Understanding how ideational praxis skills affect the ability to recognize and act on object affordances might promote greater possibilities for play interactions among autistic children.

The Effect of Visual Perceptual Load on Auditory Awareness of Social vs. Non-social Stimuli in Individuals with Autism

This study examined the effect of increasing visual perceptual load on auditory awareness for social and non-social stimuli in adolescents with autism spectrum disorder (ASD, n = 63) and typically developing (TD, n = 62) adolescents. Using an inattentional deafness paradigm, a socially meaningful ('Hi') or a non-social (neutral tone) critical stimulus (CS) was unexpectedly presented under high and low load. For the social CS both groups continued to show high awareness rates as load increased. Awareness rates for the non-social stimulus were reduced when load increased for the TD, but not the ASD group. The findings indicate enhanced capacity for non-social stimuli in ASD compared to TD, and a special attentional status for social stimuli in the TD group.

Brief Report: Cross-Modal Capture: Preliminary Evidence of Inefficient Filtering in Children with Autism Spectrum Disorder

This study investigates how task-irrelevant auditory information is processed in children with autism spectrum disorder (ASD). Eighteen children with ASD and 19 age- and IQ-matched typically developing (TD) children were presented with semantically-congruent and incongruent picture-sound pairs, and in separate tasks were instructed to attend to only visual or both audio-visual sensory channels. Preliminary results showed that when required to attend to both modalities, both groups were equally slowed for semantically-incongruent compared to congruent pairs. However, when asked to attend to only visual information, children with ASD were disproportionally slowed by incongruent auditory information, suggesting that they may have more difficulty filtering task-irrelevant cross-modal information. Correlational analyses showed that this inefficient cross-modal attentional filtering was related to greater sociocommunicative impairment.

Implications of capacity in the classroom: Simplifying tasks for autistic children may not be the answer

BACKGROUND

Research has demonstrated evidence for increased perceptual capacity in autism: autistic people can process more information at any given time than neurotypical individuals. The implications of this for educating autistic pupils have not been investigated. For example, this ability to process more information at any given time may explain why autistic children sometimes process more peripheral task-irrelevant information than neurotypical individuals (e.g. in background classroom wall-displays).

AIMS

The current study assessed the impact of different types of background information on autistic and non-autistic children's ability to perform a learning task.

METHODS AND PROCEDURES

Autistic (N = 23) and non-autistic (N = 50) children took part in a computer-based task designed to simulate a lesson. They watched three videos of a teacher telling a story, each with a different background condition: blank, relevant images, or irrelevant images.

OUTCOMES AND RESULTS

When the visual display contained story-relevant information, both groups recalled background information in addition to the central story. When the background displays were irrelevant to the story, autistic children recalled more background information than their neurotypical peers, yet maintained their ability to recall information from the central story.

CONCLUSION AND IMPLICATIONS

The current study suggests that pupils' perceptual capacity- including those on the autistic spectrum - can indeed be capitalised on to support learning in the classroom. To do so, however, we must ensure that the child can use their capacity for task-relevant processing, rather than irrelevant distractions.

Contrasting the Effects of Task Difficulty and Perceptual Load on Auditory Detection Sensitivity in Individuals with Autism

To test a central assumption of the increased perceptual capacity account in individuals with Autism Spectrum Disorder (ASD), the effects of perceptual load and target-stimulus degradation on auditory detection sensitivity were contrasted. Fourteen adolescents with ASD and 16 neurotypical controls performed a visual letter search task under three conditions: low perceptual load, high perceptual load and low perceptual load with a degraded target while simultaneously detecting an auditory tone in noise. For both participants with ASD and neurotypical controls, increasing perceptual load and target degradation increased task difficulty as indexed by reaction times and accuracy. However, only increasing perceptual load reduced subsequent auditory detection sensitivity. The study confirms that perceptual load, and not task difficulty, modulates selective attention in ASD.

Effects of perceptual load and socially meaningful stimuli on crossmodal selective attention in Autism Spectrum Disorder and neurotypical samples

The present study examined whether increasing visual perceptual load differentially affected both Socially Meaningful and Non-socially Meaningful auditory stimulus awareness in neurotypical (NT, n = 59) adults and Autism Spectrum Disorder (ASD, n = 57) adults. On a target trial, an unexpected critical auditory stimulus (CAS), either a Non-socially Meaningful ('beep' sound) or Socially Meaningful ('hi') stimulus, was played concurrently with the presentation of the visual task. Under conditions of low visual perceptual load both NT and ASD samples reliably noticed the CAS at similar rates (77-81%), whether the CAS was Socially Meaningful or Non-socially Meaningful. However, during high visual perceptual load NT and ASD participants reliably noticed the meaningful CAS (NT = 71%, ASD = 67%), but NT participants were unlikely to notice the Non-meaningful CAS (20%), whereas ASD participants reliably noticed it (80%), suggesting an inability to engage selective attention to ignore non-salient irrelevant distractor stimuli in ASD.

Noise and autism spectrum disorder in children: An exploratory survey

BACKGROUND

With more students being educated in schools for Autism Spectrum Disorder (ASD) than ever before, architects and interior designers need to consider the environmental features that may be modified to enhance the academic and social success of autistic students in school.

AIM

This study explored existing empirical research on the impact of noise on children with ASD and provides recommendations regarding design features that can contribute to noise reduction.

METHODS AND PROCEDURES

A survey, which addressed the impact of architectural design elements on autism-related behavior, was developed for teachers of children with ASD and distributed to three schools.

OUTCOMES AND RESULTS

Most teachers found noise control to be an important issue for students with autism and many observed children using ear defenders. In terms of managing issues related to noise, most teachers agreed that thick or soundproof walls and carpet in the classroom were the most important issues for children with ASD.

CONCLUSIONS

Suggested future research should address architectural considerations for building an acoustically friendly environment for children with autism, identifying patterns of problematic behaviors in response to acoustical features of the built environment of the classroom setting, and ways to manage maladaptive behaviors in acoustically unfriendly environments.