Autistic symptomatology and language ability in autism spectrum disorder and specific language impairment.

BACKGROUND Autism spectrum disorders (ASD) and specific language impairment (SLI) are common developmental disorders characterised by deficits in language and communication. The nature of the relationship between them continues to be a matter of debate. This study investigates whether the co-occurrence of ASD and language impairment is associated with differences in severity or pattern of autistic symptomatology or language profile. METHODS Participants (N = 97) were drawn from a total population cohort of 56,946 screened as part of study to ascertain the prevalence of ASD, aged 9 to 14 years. All children received an ICD-10 clinical diagnosis of ASD or No ASD. Children with nonverbal IQ > or =80 were divided into those with a language impairment (language score of 77 or less) and those without, creating three groups: children with ASD and a language impairment (ALI; N = 41), those with ASD and but no language impairment (ANL; N = 31) and those with language impairment but no ASD (SLI; N = 25). RESULTS Children with ALI did not show more current autistic symptoms than those with ANL. Children with SLI were well below the threshold for ASD. Their social adaptation was higher than the ASD groups, but still nearly 2 SD below average. In ALI the combination of ASD and language impairment was associated with weaker functional communication and more severe receptive language difficulties than those found in SLI. Receptive and expressive language were equally impaired in ALI, whereas in SLI receptive language was stronger than expressive. CONCLUSIONS Co-occurrence of ASD and language impairment is not associated with increased current autistic symptomatology but appears to be associated with greater impairment in receptive language and functional communication.

[1]  C. Drew.  Vineland Adaptive Behavior Scales , 2010 .

[2]  Ron Dumont,et al.  Clinical Evaluation of Language Fundamentals, Third Edition , 2008 .

[3]  B. Pennington,et al.  Children with Comorbid Speech Sound Disorder and Specific Language Impairment are at Increased Risk for Attention-Deficit/Hyperactivity Disorder , 2008, Journal of abnormal child psychology.

[4]  Nicola Bates BSc MSc Ma,et al.  Autism, primary pragmatic difficulties, and specific language impairment: can we distinguish them using psycholinguistic markers? , 2007 .

[5]  Lisa D. Sanders,et al.  Neurophysiological evidence for selective auditory attention deficits in children with specific language impairment , 2006, Brain Research.

[6]  B. Corbett,et al.  Autism and Attention Deficit Hyperactivity Disorder: Assessing Attention and Response Control with the Integrated Visual and Auditory Continuous Performance Test , 2006, Child neuropsychology : a journal on normal and abnormal development in childhood and adolescence.

[7]  G. Baird,et al.  Prevalence of disorders of the autism spectrum in a population cohort of children in South Thames: the Special Needs and Autism Project (SNAP) , 2006, The Lancet.

[8]  Gina Conti-Ramsden,et al.  The prevalence of autistic spectrum disorders in adolescents with a history of specific language impairment (SLI). , 2006, Journal of child psychology and psychiatry, and allied disciplines.

[9]  R. Ferdinand,et al.  WISC-R Subtest But No Overall VIQ–PIQ Difference in Dutch Children with PDD-NOS , 2006, Journal of abnormal child psychology.

[10]  Nicola Botting,et al.  Non-verbal cognitive development and language impairment. , 2005, Journal of child psychology and psychiatry, and allied disciplines.

[11]  Jenny A. Roberts,et al.  Tense marking in children with autism , 2004, Applied Psycholinguistics.

[12]  D. Bishop.  Autism and specific language impairment: categorical distinction or continuum? , 2003, Novartis Foundation symposium.

[13]  G. Conti-Ramsden,et al.  Autism, primary pragmatic difficulties, and specific language impairment: can we distinguish them using psycholinguistic markers? , 2003, Developmental medicine and child neurology.

[14]  Tony Charman,et al.  Measuring early language development in preschool children with autism spectrum disorder using the MacArthur Communicative Development Inventory (Infant Form) , 2003, Journal of Child Language.

[15]  M. Toichi,et al.  Long-term memory and levels-of-processing in autism , 2002, Neuropsychologia.

[16]  Dorothy V M Bishop,et al.  Exploring the borderlands of autistic disorder and specific language impairment: a study using standardised diagnostic instruments. , 2002, Journal of child psychology and psychiatry, and allied disciplines.

[17]  G. Baird,et al.  Parent and teacher report of pragmatic aspects of communication: use of the children's communication checklist in a clinical setting. , 2001, Developmental medicine and child neurology.

[18]  Robert Needlman,et al.  Speech and Language Impairments in Children: Causes, Characteristics, Intervention, and Outcome , 2001 .

[19]  G. Conti-Ramsden,et al.  Psycholinguistic markers for specific language impairment (SLI). , 2001, Journal of child psychology and psychiatry, and allied disciplines.

[20]  John E. Cooper,et al.  Diagnostic and Statistical Manual of Mental Disorders (4th edn, text revision) (DSM-IV-TR) , 2001 .

[21]  I. Rapin,et al.  Predictors and Correlates of Adaptive Functioning in Children with Developmental Disorders , 2001, Journal of autism and developmental disorders.

[22]  H. Tager-Flusberg,et al.  An investigation of language impairment in autism: Implications for genetic subgroups , 2001, Language and cognitive processes.

[23]  B. Leventhal,et al.  The Autism Diagnostic Observation Schedule—Generic: A Standard Measure of Social and Communication Deficits Associated with the Spectrum of Autism , 2000, Journal of autism and developmental disorders.

[24]  M. Toichi,et al.  Dual access to semantics in autism: is pictorial access superior to verbal access? , 2000, Journal of child psychology and psychiatry, and allied disciplines.

[25]  P Howlin,et al.  Autism and developmental receptive language disorder--a follow-up comparison in early adult life. II: Social, behavioural, and psychiatric outcomes. , 2000, Journal of child psychology and psychiatry, and allied disciplines.

[26]  D. Bishop,et al.  Development of the Children's Communication Checklist (CCC): a method for assessing qualitative aspects of communicative impairment in children. , 1998, Journal of child psychology and psychiatry, and allied disciplines.

[27]  J. Tomblin,et al.  Prevalence of specific language impairment in kindergarten children. , 1997, Journal of speech, language, and hearing research : JSLHR.

[28]  N. Minshew,et al.  Wechsler IQ profiles in diagnosis of high-functioning autism , 1996, Journal of autism and developmental disorders.

[29]  C Donlan,et al.  Nonword repetition as a behavioural marker for inherited language impairment: evidence from a twin study. , 1996, Journal of child psychology and psychiatry, and allied disciplines.

[30]  A. Couteur,et al.  Autism Diagnostic Interview-Revised: A revised version of a diagnostic interview for caregivers of individuals with possible pervasive developmental disorders , 1994, Journal of autism and developmental disorders.

[31]  M. Rutter,et al.  Infantile autism and developmental receptive dysphasia: A comparative follow-up into middle childhood , 1989, Journal of autism and developmental disorders.

[32]  M. Rutter,et al.  A Comparative Study of Infantile Autism and Specific Developmental Receptive Language Disorder , 1975, British Journal of Psychiatry.

[33]  Lynne E. Hewitt,et al.  Children with Specific Language Impairment , 2002 .

[34]  Helen Tager-Flusberg,et al.  Understanding the language and communicative impairments in autism , 2000 .

[35]  M. Rutter,et al.  A comparative study of infantile autism and specific development receptive language disorder. I. The children. , 1975, The British journal of psychiatry : the journal of mental science.