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Dive into the research topics where Darren Hedley is active.

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Featured researches published by Darren Hedley.


Autism | 2006

Social comparison processes and depressive symptoms in children and adolescents with Asperger syndrome

Darren Hedley; Robyn L. Young

The present study investigated the relationship between social comparison processes and depressive symptoms in 36 participants (34 males and two females) aged 10 to 16 years with Asperger syndrome. Participants completed the Social Comparison Scale and the Children’s Depression Inventory. Depressive symptoms were significantly correlated with the SCS (r = 0.52, p = 0.001), specifically perceived group membership (r = 0.56, p < 0.001). A regression analysis revealed that perceived group membership significantly and independently predicted depression scores (β= 0.56, p = 0.002). It is suggested social comparison is a salient factor related to depressive symptoms in this group, and interventions involving adolescents with AS should therefore address this factor.


Autism Research | 2011

Face recognition performance of individuals with Asperger syndrome on the Cambridge face memory test

Darren Hedley; Neil Brewer; Robyn L. Young

Although face recognition deficits in individuals with Autism Spectrum Disorder (ASD), including Asperger syndrome (AS), are widely acknowledged, the empirical evidence is mixed. This in part reflects the failure to use standardized and psychometrically sound tests. We contrasted standardized face recognition scores on the Cambridge Face Memory Test (CFMT) for 34 individuals with AS with those for 42, IQ‐matched non‐ASD individuals, and age‐standardized scores from a large Australian cohort. We also examined the influence of IQ, autistic traits, and negative affect on face recognition performance. Overall, participants with AS performed significantly worse on the CFMT than the non‐ASD participants and when evaluated against standardized test norms. However, while 24% of participants with AS presented with severe face recognition impairment (>2 SDs below the mean), many individuals performed at or above the typical level for their age: 53% scored within +/− 1 SD of the mean and 9% demonstrated superior performance (>1 SD above the mean). Regression analysis provided no evidence that IQ, autistic traits, or negative affect significantly influenced face recognition: diagnostic group membership was the only significant predictor of face recognition performance. In sum, face recognition performance in ASD is on a continuum, but with average levels significantly below non‐ASD levels of performance. Autism Res 2011,4:449–455.


Child and Adolescent Psychiatry and Mental Health | 2013

Resource factors for mental health resilience in early childhood: An analysis with multiple methodologies

Lauren R. Miller-Lewis; Amelia K. Searle; Michael Sawyer; Peter Baghurst; Darren Hedley

BackgroundGiven that relatively little is known about the development of resilience in early childhood, this longitudinal study aimed to identify preschool resource factors associated with young children’s mental health resilience to family adversity.MethodsA community sample of 474 young Australian children was assessed in preschool (mean age 4.59 years, 49% male), and again two years later after their transition into formal schooling. At each assessment, standard questionnaires were used to obtain ratings from both parents and teachers about the quality of children’s relationships with parents and teachers, children’s self-concept and self-control, mental health (Strengths and Difficulties Questionnaire), and family adversities (including stressful life events and socioeconomic disadvantage).ResultsGreater exposure to cumulative family adversities was associated with both greater teacher- and parent-reported child mental health difficulties two years later. Multiple methodologies for operationalizing resilience were used to identify resources associated with resilient mental health outcomes. Higher quality child–parent and child-teacher relationships, and greater child self-concept and self-control were associated with resilient mental health outcomes. With the exception of child-teacher relationships, these resources were also prospective antecedents of subsequent resilient mental health outcomes in children with no pre-existing mental health difficulties. Child–parent relationships and child self-concept generally had promotive effects, being equally beneficial for children facing both low- and high-adversity. Child self-control demonstrated a small protective effect on teacher-reported outcomes, with greater self-control conferring greater protection to children under conditions of high-adversity.ConclusionsFindings suggest that early intervention and prevention strategies that focus on fostering child-adult relationship quality, self-concept, and self-control in young children may help build children’s mental health and their resilience to family adversities.


Autism | 2010

Cross-Cultural Evaluation of the Autism Detection in Early Childhood (ADEC) in Mexico

Darren Hedley; Robyn L. Young; María Angelica; Juarez Gallegos; Carlos Marcin Salazar

A Spanish translation of the Autism Detection in Early Childhood (ADEC-SP) was administered to 115 children aged 15—73 months in Mexico. In Phase 1, children with Autistic Disorder (AD), a non-Pervasive Developmental Disorder (PDD) diagnosis or typical development were assessed with the ADEC-SP by a clinician blind to the child’s diagnostic status. In Phase 2, a referred sample of children was assessed with the ADEC-SP, Childhood Autism Rating Scale (CARS), Autism Diagnostic Interview — Revised (ADI-R) and Diagnostic and Statistical Manual of Mental Disorders, 4th Edition (DSM-IV), and typically developing children were assessed with the ADEC-SP and CARS. Psychometric properties relating to validity and reliability were addressed. Sensitivity and specificity levels for the ADEC-SP ranged from .79—.94 and .88—1.00 respectively. In a subgroup of toddlers aged 19 to 36 months the ADEC-SP correctly identified 17 of the 18 children with a diagnosis of a PDD, and no child without a PDD diagnosis was misdiagnosed. The ADEC-SP shows promise as a Level 2 screening instrument for use in Mexico.


Autism | 2017

Employment programmes and interventions targeting adults with autism spectrum disorder: A systematic review of the literature.

Darren Hedley; Mirko Uljarević; Lauren Cameron; Santoshi Halder; Amanda L. Richdale; Cheryl Dissanayake

Individuals with autism spectrum disorder face significant challenges entering the workforce; yet research in this area is limited and the issues are poorly understood. In this systematic review, empirical peer-reviewed studies on employment programmes, interventions and employment-related outcomes in individuals with autism spectrum disorder over 18 years with and without intellectual disability were identified and evaluated. The review was prefaced by a summary of previous systematic reviews in the area. Web of Science, Medline, PsychINFO, ERIC and Scopus databases were systematically searched through to October 2015. From 32,829 records identified in the initial search, 10 review and 50 empirical articles, comprising N = 58,134 individuals with autism spectrum disorder, were included in the review. Selected articles were organised into the following themes: employment experiences, employment as a primary outcome, development of workplace skills, non-employment-related outcomes, assessment instruments, employer-focused and economic impact. Empirical studies were limited by poor participant characterisation, small sample size and/or a lack of randomisation and use of appropriate controls. Poor conceptualisation and measurement of outcomes significantly limited study quality and interpretation. Future research will require a multidisciplinary and multifaceted approach to explore employment outcomes on the individual, the family system, co-workers and the employer, along with the impact of individual differences on outcome.


Autism Research | 2018

The Hospital Anxiety and Depression scale: Factor structure and psychometric properties in older adolescents and young adults with autism spectrum disorder

Mirko Uljarević; Amanda L. Richdale; Helen McConachie; Darren Hedley; Ru Ying Cai; Hannah Merrick; Jeremy R. Parr; Ann Le Couteur

Despite the high frequency of anxiety and depression symptoms in individuals with Autism Spectrum Disorder (ASD) and a significant impact of these comorbidities on both individuals with ASD and their families, research on the validity of anxiety and depression measures in the ASD population is currently lacking. The aim of this study was to explore the psychometric properties of the Hospital Anxiety and Depression Scale [HADS; Zigmond & Snaith, ] in a sample of older adolescents and young adults with ASD. One hundred and fifty one participants (UK Transition longitudinal study: N = 106; 75 males, Mage = 16.04 years, SD = 1.28; Longitudinal Study of Australian Schools Leavers with ASD: N = 45, 30 males; Mage = 18.35 years, SD = 2.55) completed the HADS and a range of mental health and well‐being measures. Combination of the Principal Component Analysis and Parallel Analysis indicated two factors as an optimal solution in our sample, accounting for 43.77% of variance with factors being identical in terms of content with the structure found in the general population. Internal consistency was good for the HADS anxiety scale (HADS‐A; .82–.84) and acceptable for the HADS depression scale (HADS‐D; .60–.72). Convergent validity of both HADS‐A and HADS‐D scales was excellent and divergent validity was acceptable. Our study represents a significant contribution to the literature by providing an initial validation of the HADS in older adolescents and younger adults with ASD. Autism Res 2018, 11: 258–269.


Journal of Autism and Developmental Disorders | 2017

Brief Report: Social Support, Depression and Suicidal Ideation in Adults with Autism Spectrum Disorder.

Darren Hedley; Mirko Uljarević; Mathilda Wilmot; Amanda L. Richdale; Cheryl Dissanayake

Adults with autism spectrum disorder (ASD) are at increased risk of suicide compared to the general population. Research has yet to identify the mechanisms underlying this increased risk. This study examined perceived social support as a potential protective factor for depressive symptoms and suicidal ideation in 76 adults with ASD. Twenty-five percent of participants were in the clinical range for depression, and 20% reported recent suicidal ideation. Social support in the form of appraisal and belonging was not associated with depression or ideation; however the perceived availability of tangible (material) support indirectly acted on ideation through depression. The findings suggest that tangible support, but not appraisal or belonging, may act as an indirect protective factor against suicidality in ASD.


Autism Research | 2012

Using Eye Movements as an Index of Implicit Face Recognition in Autism Spectrum Disorder

Darren Hedley; Robyn L. Young; Neil Brewer

Individuals with an autism spectrum disorder (ASD) typically show impairment on face recognition tasks. Performance has usually been assessed using overt, explicit recognition tasks. Here, a complementary method involving eye tracking was used to examine implicit face recognition in participants with ASD and in an intelligence quotient‐matched non‐ASD control group. Differences in eye movement indices between target and foil faces were used as an indicator of implicit face recognition. Explicit face recognition was assessed using old–new discrimination and reaction time measures. Stimuli were faces of studied (target) or unfamiliar (foil) persons. Target images at test were either identical to the images presented at study or altered by changing the lighting, pose, or by masking with visual noise. Participants with ASD performed worse than controls on the explicit recognition task. Eye movement‐based measures, however, indicated that implicit recognition may not be affected to the same degree as explicit recognition. Autism Res 2012, 5: 363–379.


Journal of Autism and Developmental Disorders | 2015

The Effect of Inversion on Face Recognition in Adults with Autism Spectrum Disorder

Darren Hedley; Neil Brewer; Robyn L. Young

Face identity recognition has widely been shown to be impaired in individuals with autism spectrum disorders (ASD). In this study we examined the influence of inversion on face recognition in 26 adults with ASD and 33 age and IQ matched controls. Participants completed a recognition test comprising upright and inverted faces. Participants with ASD performed worse than controls on the recognition task but did not show an advantage for inverted face recognition. Both groups directed more visual attention to the eye than the mouth region and gaze patterns were not found to be associated with recognition performance. These results provide evidence of a normal effect of inversion on face recognition in adults with ASD.


Autism Research | 2017

Heterogeneity of sensory features in autism spectrum disorder: Challenges and perspectives for future research

Mirko Uljarević; Grace T. Baranek; Giacomo Vivanti; Darren Hedley; Kristelle Hudry; Alison E. Lane

Pronounced heterogeneity is apparent across every facet of autism spectrum disorder (ASD) and it remains difficult to predict likely future potential among individuals who share a common diagnosis of ASD on the basis of early presentation. In this commentary we argue that a fine‐grained understanding of individual differences in sensory features and their influence across the life span can constrain noted clinical heterogeneity in ASD. We organize our discussion around the following three critical themes: (a) considering sensory features as dimensional construct; (b) taking an “individual differences” approach; and (c) adopting a comprehensive, multidimensional and multimodal approach to measurement of sensory features. We conclude that future research will need to investigate individual differences in sensory features via: (1) multidimensional and cross‐disciplinary examination, (2) prospective longitudinal designs, and (3) dimensional and developmental frameworks that emphasize the potential value of early individual variability as indicators of later outcomes, not only in relation to the categorical diagnostic outcome status but also the presence of other clinical features. This is a key time for sensory‐related research and in this commentary we provide some of the steps that, in our opinion, can shape future research in this area. Autism Res 2017, 10: 703–710.

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Simon A. Moss

Charles Darwin University

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