This week Dorothy Bishop, a Professor in Developmental Neuropsychology, wrote for The Guardian’s Science blog: http://www.guardian.co.uk/science/2010/dec/01/sli-autism-childhood-developmental-disorders
Professor Bishop wrote about dyslexia, autism and Specific Language impairment (SLI). She argues that SLI occurs as much as dyslexia (Tomblin et al), and ten times as much as autism (Baird et al). She also states that the general public are relatively unaware of SLI, despite its prevalence.

Children with SLI have difficulty understanding and/or producing language. It is a ‘pure’ impairment – there is no obvious reason for these difficulties, such as an underlying medical or neurological condition. 

Professor Bishop argues that despite the high instances of SLI in the population, it does not receive the national attention or research interest that dyslexia and autism do. While she suggests a number of factors for this apparent disregard, her

particular concern lies with the issue of ‘professional prestige’.She fears that as mental health sits with medicine and child

development with psychology, they will be far more attractive areas for research funders than SLI, which sits with speech &

language therapy.

She explains this in her most recent paper by analysing research rates for neurodevelopmental disorders:

Professor Bishop suggests that rarer disorders receive significantly more funding for research than more common disorders. She suggests that this may be due to the severity of the rarer disorders – autism, for example, is perceived to be far more severe than dyslexia or SLI, and receives far more research funding. She cites ADHD as being an interesting example – many children with ADHD show mild symptoms, and yet research rates are very high.

Professor Bishop found several developmental disorders that were hugely under-researched (taking severity, frequency and other relevant factors into consideration). These included developmental dyscalculia (difficulty with mathematics and calculations), developmental coordination disorder (difficulties with normal motor coordination), and speech-sound disorder (difficulty with speech sounds past a certain age). These disorders affect some fundamental child developmental skills – speech, language, movement and numeracy. Certainly there is an argument that these deserve more research than relatively rarer disorders.

If you are concerned that your child may have SLI, ITS can be of help. See https://integratedtreatmentservices.co.uk/ for more information about contacting us for an informal chat.

Sarah Bennington – December 2010

Written on behalf of Integrated Treatment Services. ITS is a private Speech and Language Therapy service based in Leicestershire and the East Midlands. It specialises in providing highly-skilled Speech and Language Therapists, but also associates with other therapeutic professionals, including Occupational Therapists, Physiotherapists, Psychologists and Arts Therapists.

Further Information

Baird, G., Simonoff, E., Pickles, A., Chandler, S., Loucas, T., Meldum, D. & Charman, T. (2006). Prevalence of disorders of the autism spectrum in a population cohort of children in South Thames: the Special Needs and Autism Project (SNAP). Lancet, 368 (9531), 210-5.

BishopBlog: http://deevybee.blogspot.com/

Oxford Study of Children’s Communication Impairments (OSCCI): http://psyweb.psy.ox.ac.uk/oscci/

Tomblin, J., Records, N., Buckwalter, P., Zhang, X., Smith, E. & O’Brien, M. (1997). Prevalence of specific language impairment in kindergarten children. Journal of Speech, Language & Hearing Research, 40 (6), 1245-60.


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