This diagnosis, also known as “precocious reading” often, but not always, co-exists with a diagnosis of Autism Spectrum Disorder (ASD). Children with hyperlexia generally an early and strong interest in letters, symbols and patterns at an age much earlier than is typically seen in children. For almost 40 years, CHAT has been at the forefront of hyperlexia diagnosis and therapy. If you are interested in getting more information on hyperlexia or in CHAT’s hyperlexia services please complete this Hyperlexia Intake Form.
What is hyperlexia?
Hyperlexia is a term that describes a child’s precocious ability to read (far above what would be expected at their age or developmental level) within the context of another developmental disorder.
What do we know about its diagnosis?
Although hyperlexia may be the key symptom in describing the learning difference in a child, it is not a stand-alone “official” diagnosis. Rather, it exists on a continuum with other disorders, such as autism spectrum disorder, specific language disorder or social (pragmatic) communication disorder. Children with hyperlexia may also exhibit other conditions, such as sensory integration dysfunction, attention deficit/hyperactivity disorder, childhood apraxia of speech, motor dyspraxia, obsessive-compulsive disorder, depression and/or seizure disorder.
We have often been asked why we identify children with hyperlexia if they have other diagnoses or conditions. The most important reason is that these children learn primarily through reading, so the therapeutic and educational programs that we devise for them must take their reading skills into account. The reading skills of these children are their strength, and we use this strength to develop their weaker skills.
Children with hyperlexia are delightful, interesting and challenging. They have taught us about learning, language and life. We have found that there are new concerns at each stage of development, and our work with these children is never done. The children we worked with in the early days were a capable group. Most of them did well academically, thanks to a lot of hard work by their parents and teachers. However, their learning style persisted, and they needed to be taught in the way that THEY learned. As we treated many more children over the years, we realized that there is a spectrum of outcomes depending on the severity of the disorders associated with the hyperlexia.
Identification of hyperlexia is most important when children are young, because early intervention increases children’s chances for success, and since reading is a powerful tool for learning language and social skills, Once a child begins to understand verbal language, written language can be gradually decreased and used only in certain situations when something new or confusing is introduced. Although symptoms tend to decrease over time, the characteristic learning style remains through adulthood.
What have we learned?
After identifying, working with and following several hundred children with hyperlexia for over 30 years, we have learned the following:
- Children with hyperlexia often have a difficult time processing what is said to them, but they are lucky because their language learning can be supported by written language. Once a child begins to understand verbal language, written language can be used less frequently, such as when something new or confusing is introduced.
- English is a difficult and confusing language. Wh-questions (who, what, where, when and why) need to be specifically taught using written and verbal prompts and scripts. Ask the question and give the answer. Teach how to create a narrative or tell a story. Frame experiences or behavioral patterns using written words.
- Rote learning is okay. Routine is good. Computers, tablets, videos and books are great teaching tools, since they are predictable.
- Although rote learning is good, a child with hyperlexia also needs to be taught about the flexibility of routine and language.
- Incorporate what each child is interested in into lessons (for example, maps, dinosaurs, cars, plumbing, cartoon characters).
- Punishment does not work. What does work is setting up a positive reinforcement system that will support the behavior you desire to teach. Write what you want the child TO do, not just what NOT TO do.
- Children with hyperlexia have benefited from a variety of educational settings and therapeutic approaches as long as their reading abilities are recognized and used to help them learn. Educational programs need to be adapted to fit their language learning differences.
- Each year is different. Parents and professionals need to evaluate programs and interventions based on the child’s needs that year.
- Medications, diets and nutritional supplements are not cures, but they may help particular symptoms, such as anxiety, obsessive/compulsive symptoms and attention deficits.
- It is important to script coping language for the child in an effort to decrease negative physical behavior.
- Occupational therapists have lots of good ideas. Consult an occupational therapist trained in sensory integration techniques.
- Social skills are important and need to be specifically taught and practiced. Boys and girls need different kinds of social language groups until the teen years, at which time communication between boys and girls is the issue.
- Some people will never understand, and that is okay. Appreciate those who make the effort.
- “Write, write, write, because the child with hyperlexia will read, read, read.” Susan Martins Miller
- “When in doubt, write it out. (If it isn’t written, it may not exist.)” Canadian Hyperlexia Association
Children with Hyperplexia – Frequently Asked Questions:
Is a child who is not yet reading, but is very interested in letters, considered hyperlexic’?
Strictly speaking, these children are not hyperlexic because they are not reading. Some children who do not read at 2 or 3 years old may still develop reading decoding or sight-reading at 4 and 5 years old and may then be diagnosed with hyperlexia. Some children who are strong visual learners, though not readers, may still benefit from the intervention techniques developed for children with hyperlexia.
Do children with hyperlexia understand what they are reading?
They understand what they read about as well as they understand language in general. Many children with hyperlexia have difficulty processing what people say to them. They may have a difficult time using language for thinking and reasoning. They also usually understand concrete language better than abstractions or inferences. Reading supports language learning because it makes the language visual. Therefore, language learning improves, and reading comprehension also improves.
What causes hyperlexia in children?
The presence of hyperlexia within the context of another developmental disorder probably reflects a difference in the neurological organization of the brain. While a cause is not yet known, research in genetics and functional MRI studies may provide some information in the future.
Isn’t hyperlexia just a savant skill or a “splinter skill”?
A savant or splinter skill is an isolated ability that appears within individuals with developmental disabilities. Generally, these skills have no relationship to other aspects of the individual’s functioning. Hyperlexia is not an isolated skill, but a tool which can be used to develop language, to modify behavior and to help the individual make sense of the world.
Does the presence of hyperlexia mean that the children are” higher functioning”?
In working with a large number of children with hyperlexia, we have seen a spectrum of outcomes. Some children, though they may be excellent readers, may exhibit severe and persistent symptoms of autism. Other children have great difficulties developing verbal expressive language, though their written expressive language may exceed their verbal abilities. Some children may do well academically, but may have difficulties socially. It is hard to predict what a child with hyperlexia will be like as a young adult; however, we do know that using writing to supplement their learning leads to better progress.
Do children with hyperlexia get better?
Children with hyperlexia do improve in language and social skills. Some individuals improve to the point that they are able to go to college, live independently, drive a car and succeed in the workplace. Others will need special education and supervised living arrangements throughout their lives.
Accessing CSLD’s Hyperlexia Services:
Services Across the Lifespan
As children with hyperlexia progress through their early childhood and school years, we provide help in meeting the ever increasing challenges of academic life and demands on social abilities. We show families how to adapt curriculum material to promote learning, we devise programs for higher-level reading comprehension and we help children develop age-appropriate social conversational skills.
Evaluation: assesses reading skills, language skills and social skills through formal testing, observation, parent interview and record review.
Intervention: is individualized for each child. Each treatment …
- Is evidence-based
- Takes into account the interests and strengths of the child
- Uses written language and visual materials to support language learning, reading comprehension, and social skills.
- Uses tablets, computers and books to support learning
- Seeks to help parents, teachers and therapists understand the learning style of children with hyperlexia.
Out of town Families:
- Phone/Skype Consult
- Extended Evaluation: This includes a comprehensive assessment, followed by 120 minutes of family training. The aim of the extended evaluation is to provide an evaluation of communication skills, in addition to providing information regarding learning styles, tips for family and teachers working with the client at home, and for the clinician to model therapy techniques and provide coaching to the parent so they can implement these at home.
- Additional Family Training sessions while you are in town
To inquire further about services or schedule an appointment contact 630-652-0200 or email firstname.lastname@example.org
Hyperlexia: Therapy that Works: A Guide for Parents and Teachers
By the Clinical Staff of the Center for Speech and Language Disorder
This is a practical guide with intervention strategies for children with hyperlexia. The reading skills of these children are their strength and we use this strength to develop their weaker skills. Please click here to download a copy of this publication.
Children with Hyperlexia – Revised 2002
Produced by CSLD – 12 minutes
This video provides up-to-date information about hyperlexia and its relationship to other disorders. Viewers will have a better understanding of why hyperlexia should be identified. The principles of intervention for children with this syndrome are illustrated with examples of therapy sessions. Click below to watch!
Reading Too Soon: How to Understand and Help the Hyperlexic Child
By Susan Martins Miller
“How can a child read so well but not understand what I say?” This is only one of the questions answered in this timely book. Reading Too Soon will be helpful to parents, other family members, caregivers, teachers and therapist who want to see a child with hyperlexia move more toward successful independence. Click here to download a copy of Reading Too Soon.
References on Hyperlexia and Related Disorders
Aaron, P.G. (1994). Dyslexia and hyperlexia: Diagnosis and management of developmental reading disabilities. Boston: Kluwer Academic Publishers.
Aram, D. (1997). Hyperlexia: Reading without meaning in young children. Topics in Language Disorders, 17(3), 1-13.
Aram, D.M., Ekelman, B.L., & Healy, J.M. (1984, June). Reading profiles of hyperlexic children. Paper presented at the meeting of the International Neuropsychology Society. Aachen, West Germany.
Aram, D.M. & Healy, J.M. (1988). Hyperlexia: A review of extraordinary word recognition. The Exceptional Brain Ed. Obler, L.K. and Fein, D., The Guilford Press. New York, 70-102.
Barouski, K. (1995, October). Inclusion strategies for the hyperlexic child. Paper presented at the Eleventh Annual Conference on the Language Disordered Child. Elmhurst, IL.
Blodgett, E.G., & Cooper, E.B. (1987). Analysis of the language of learning. Moline, IL: LinguiSystems
Bryson, S., & Smith, I. (1994, April). A case study of literacy and socioemotional development in a mute autistic female. Journal of Autism and Developmental Disorders, 24(2), 225-31.
Buchalter, G. (1996, August). To break the silence: Some adults have emerged from the isolated world of autism. Parade, 12-13.
Burd, L., Fisher, W., Knowlton, D., & Kerbeshian, J. (1985). Hyperlexia: A marker for improvement in children with pervasive developmental disorder. Journal of the American Academy of Child and Adolescent Psychiatry, 26(3), 407-412.
Burd, L., & Kereshian, J. (1988). Familial pervasive developmental disorder, Tourette disorder, and hyperlexia. Neuroscience and Biobehavioral Reviews, 12, 233-234.
Burd, L., & Kereshian, J. (1985). Hyperlexia and a variant of hypergraphia. Perceptual and Motor Skills, 60, 940-942.
Burd, L., & Kereshian, J. (1985). Inquiry into the incidence of hyperlexia in a statewide population of children with pervasive developmental disorder. Psychological Reports, 57, 236-238.
Burd, L., & Kereshian, J. Hyperlexia in Prader-Willi syndrome. Available at the Center for Speech and Language Disorders, Elmhurst, IL.
Center for Speech and Language Disorders (2002 & 2013). Hyperlexia: Therapy that works: A guide for parents and teachers. Elmhurst, IL: Author.
Cobrink, L. (1982). The performance of hyperlexic children on an “incomplete words” task. Neuropsychologia, 3, 22-28.
Cohen, M., Campbell, R., & Gelardo, M. (1987). Hyperlexia: A variant of aphasia or dyslexia. Pediatric Neurology, 3, 22-28.
Comerford, M. (1990, July 25). Reading at early age but facing host of problems. Chicago Tribune, D1-D2.
Cossu, G., & Marshall, J. (1986). Theoretical implications of the hyperlexia syndrome: Two new Italian cases. Cortex, 22, 579-589.
Craig, H.K., & Telfer, A.M. (2005). Hyperlexia and autism spectrum disorder: A case study of scaffolding language growth over time. Topics in Language Disorders, 25(4), 364-374.
DeAngelis, T. (1989). Researcher focuses attention on attention. The A.P.A. Monitor, 20(12), 8.
De Hirsch, K. (1971). Are hyperlexics dyslexics? Journal of Special Education, 5(3), 243-246.
Divoky, D. (1975). The Silberbergs: Education’s gentle iconoclasts. Learning, 2, 72-76.
Duffner, P.K., Cohen, M.E., Seidel, F.G., & Shucard, D.W. (1989). The significance of MRI abnormalities in children with neurofibromatosis. Neurology, 39, 373-378.
Elliot, E., & Needleman, R. (1976). The syndrome of hyperlexia. Brain and Language, 3, 339-349.
Fisher, W., Burd, L., & Kerbeshian, J. (1988). Markers for improvement in children with pervasive development disorders. Journal of Mental Deficiency Research, 32, 357-369.
Fontenelle, S., & Alarcon, M. (1982). Hyperlexia: Precocious word recognition in developmentally delayed children. Perceptual and Motor Skills, 55, 247-252.
Frith, U., & Snowling, M. (1983). Reading for meaning and reading for
sound in autistic and dyslexic children. Journal of Developmental Psychology, 1, 329-342.
Getz, M. Eighth Annual Conference on the Language Disordered Child. (1992). Outlook on Diagnostic Perspectives. (Audiocassettes and Outlines of Information Presented). Center for Speech and Language Disorders. Elmhurst, IL.
Glosser, G. et al. Hyperlexia: A case of reading without meaning. Paper presented at the Annual Meeting of the International Neuropsychological Society. San Antonio, TX.
Glosser, G., Friedman, R., & Roeltgen, D. (1996). Clues to the cognitive organization of reading and writing from developmental Hyperlexia, Neuropsychology, 10, 168-175.
Goldberg, T. (1987). On hermetic reading abilities. Journal of Autism and Developmental Disorders, 17, 29-44.
Goldberg, T., & Rothermel, R. (1984). Hyperlexic children reading. Brain, 107, 769-785.
Gough, P.B., & Tunmer, W.E. (1986). Decoding, reading, and reading disability. Remedial and Special Education (RASE), 7(1), 6-10.
Graziani, L., Brodsky, K., Mason, J., & Zager, L.R. (1983). Variability in IQ scores and prognoses in children with hyperlexia. Journal of the American Academy of Child Psychiatry, 22, 441-443.
Grigorenko, E.L., Klin, A., Pauls, D.L., Senft, R., Hooper, C., & Volkmar, F. (2002). A descriptive study of hyperlexia in a clinically referred sample of children with developmental delays. Journal of Autism and Developmental Disorders, 32(1), 3-12.
Grigorenko, E.L., Volkmar, F., & Klin, A. (2003). Hyperlexia: Disability or superability? Journal of Child Psychology and Psychiatry, 44, 1079-1091.
Groff, P. (1989). Phonics-capable children who cannot comprehend. Reading Instruction Journal, 32(3), 39-43.
Hallgren, P. (1950). Specific dyslexia: A clinical and genetic study. Acta Psychiatric et Neurologica, Supplement 65.
Healy, J. (1982). The enigma of hyperlexia. Reading Research Quarterly, 3, 319-338.
Healy, J., & Aram, D. (1986). Hyperlexia and dyslexia: A family study, Annals of Dyslexia, 36, 237-252.
Healy, J., Aram, D., Horwitz, S., & Kessler, J. (1982). A study of hyperlexia. Brain and Language, 9, 1-23.
Healy, J. (1981). A study of hyperlexia. Dissertation Abstracts International, 41(11-A), 4665-4666.
Heh, C.W.C., Smith, R., Wu, J., Hazlett, E., Russell, A., Asarnow, R., et al. (1989). Positron emission tomography of the cerebellum in autism. American Journal of Psychiatry, 146(2), 242-245.
Huttenlocher, P., & Huttenlocher, J. (1973). A study of children with hyperlexia. Neurology, 23, 1107-1116.
Kerr, M. (1984). Hyperlexia. Unpublished manuscript.
Kistner, J., Robbins, F., & Haskett, M. (1988). Assessment and skill remediation of hyperlexic children. Journal of Autism and Developmental Disorders, 18(2), 191-205.
Kupperman, P. (1997). Precocious reading skills may signal hyperlexia. The Brown University Child and Adolescent Behavior Letter, 13, 2-4.
Kupperman, P. (2010). The reading comprehension kit for hyperlexia and autism level 2. East Moline, IL: LinguiSystems.
Kupperman, P., Barouski, K., & Bligh, S. (1987). Language intervention with hyperlexic children. (Videocassette). Center for Speech and Language Disorders. Elmhurst, IL.
Kupperman P., Bligh, S., & Barouski, K. (1990). Hyperlexia. Unpublished manuscript. Center for Speech and Language Disorders. Elmhurst, IL.
Kupperman P., Bligh, S., & Barouski, K. (1990). Hyperlexia in young school age children. Unpublished manuscript. Center for Speech and Language Disorders. Elmhurst, IL
Kupperman, P., Bligh S., & Barouski, K. (1990). The syndrome of hyperlexia vs. high functioning autism and Asperger’s syndrome. Unpublished manuscript. Center for Speech and Language Disorders. Elmhurst, IL.
Kupperman, P., & Bligh, S. (1992). The syndrome of hyperlexia: Remediation techniques. Unpublished manuscript. Center for Speech and Language Disorders. Elmhurst, IL.
Lawton, Tammy. (1993). Hyperlexia. Unpublished manuscript. Available at the Center of Speech and Language Disorders.
Lotter, V. (1974). Factors related to outcome in autistic children. Journal of Autism and Childhood Schizophrenia, 4, 263-277.
Makita, K. (1966). The rarity of reading disability in Japanese children. American Journal of Orthopsychiatry, 599-611.
McClure, P.H., & Hynd, G.W. (1983). Is hyperlexia a severe reading disorder or a symptom of psychiatric disturbance? Nosological considerations. Clinical Neuropsychology, 4, 145-149.
Mehegan, C., Fritz, E., & Dreifuss, F. (1972). Hyperlexia: Exceptional reading ability in brain damaged children. Neurology, 22, 1105-1111.
Miller, S.M. (1993). Reading too soon. Center for Speech and Language Disorders. Elmhurst, IL.
Moss, G. (1994, September). Hyperlexia. Chicago Parent, 22-25.
Nation, K. (1999). Reading skills in hyperlexia: A developmental perspective. Psychological Bulletin, 125(3), 338-355.
Newman, T.M., Macomber, D., Naples, A.J., Babitz, T., Volkmar, F., & Grigorenko, E.L. (2007). Hyperlexia in children with autism spectrum disorders. Journal of Autism and Developmental Disorders, 37(4): 760-774.
O’Connor, N., & Hermelin, B. (1994). Two autistic savant readers. Journal of Autism and Developmental Disorders: 24(4), 501-515.
Patti, P.J., & Lupinetti, L. Brief report: Implications of hyperlexia in an autistic savant. Journal of Autism and Developmental Disorders: 23(2), 397-405.
Parker, S.W. (1919). Pseudo-latent for words. Psychology Clinics, 11, 1-7.
Pennington, B., Johnson, C., & Walsh M. (1987). Unexpected reading precocity in a normal preschooler: Implications for hyperlexia. Brain and Language, 30, 165-180.
Phillips, A. (1930). Talented imbeciles. Psychology Clinics, 18, 246-265.
Prizant, B.M. (1982). Gestalt language and Gestalt processing in autism. Topics in Language Disorders, 3, 16-23.
Rawson, M. (1971). Let’s shoot for eulexia not at hyperlexia. Journal of Special Education, 5(3), 247-252.
Richman, L., & Kitchell, M. (1981). Hyperlexia as a variant of developmental language disorder. Brain & Language, 12, 203-12.
Richman, L. (1995, Fall). Peaceful coexistence: Autism, Asperger’s, hyperlexia. American Hyperlexia Association Newsletter.
Richman, L., & Wood, K. (2002). Learning disability subtypes: Classification of high functioning hyperlexia. Brain and Language, 1-12.
Ricketts, K. (1994, February 1). Language barrier. The Daily Gazette, D1, D2.
Rispens, J., & Van Berckelaer, I.A. (1991). Hyperlexia: Definition and criterion. In J. R. Maletesha (Ed.), Written language disorders (pp. 143-163). New York: Kluwer Academic/Plenum Publishers.
Rozen, P., Poritsky, S., & Sotsky, R. (1971). American children with reading problems can easily learn to read English represented by Chinese characters. Science, 171, 1264-1267.
Sasanuma, S. (1975). Kana and kanji processing in Japanese aphasics. Brain and Language, 2, 369-383.
Schultz, E. Hyperlexia Recognition and Establishment of Methods and Materials for Remediation. Unpublished Manuscript, Department of Special Education, George Washington University. Available at the Center for Speech and Language Disorders, Elmhurst, IL.
Seymour, P., & Evans, H. (1992). Beginning reading without semantics: A cognitive study of hyperlexia. Cognitive Neuropsychology, 9(2), 89-122.
Shane, H.C. The relationship of hyperlexia and FC facilitated communication. The Clinical and Social Phenomenon, 23-24.
Siegal, L. (1984). A longitudinal study of a hyperlexic child: Hyperlexia as a language disorder. Neuropsychologia, 22, 577-585.
Siegal, L. (1993). The modularity of reading and spelling: Evidence from hyperlexia. Handbook of Normal and Disturbed Spelling, (Eds. Brown, G.D.A. and Ellis, N.C.) John Wiley, Sussex: UK.
Silberberg, N., & Silberberg, M. (1967). Hyperlexia: Specific word recognition skills in young children. Exceptional Children, 34.
Silberberg, N., & Silberberg, M. (1968). Case histories in hyperlexia. Journal of School of Psychology, 7, 3-7.
Silberberg, N., & Silberberg, M. (1971). Hyperlexia: The other end of the continuum. Journal of Special Education, 5¸ 233-267.
Smith, I.M., & Bryson, S.E. (1988). Monozygotic twins concordant for autism and hyperlexia. Dev. Medicine & Child Neurology, 30(4), 527.
Snowling, M., & Frith, U. (1986). Comprehension in hyperlexic readers. Journal of Experimental Child Psychology, 42, 392-415.
Sparks, R.L. (1995). Phonemic awareness in hyperlexic children. Reading and Writing: An Interdisciplinary Journal, 7, 217-235.
Sparks, R.L. (2001). Phonemic awareness and reading skills in hyperlexic children: A longitudinal study. Reading and Writing: An Interdisciplinary Journal, 14, 333-360.
Sparks, R.L. (2004). Orthographic awareness, phonemic awareness, syntactic processing and working memory skill in hyperlexic children. Reading and Writing, 17(4), 359-386.
Stuart, S. Hyperlexia: Description, prognosis, and implications for family counseling. A Thesis Submitted to the Facility of the Graduate School of Loyola University of Chicago. Available at the Center for Speech and Language Disorders, Elmhurst, IL.
Temple, C.M. (1990). Auditory and reading comprehension in hyperlexia: Semantic and syntactic skills. Reading and Writing: An Interdisciplinary Journal, 2(4), 297-306.
Temple, C.M., & Carney, R. (1996). Reading skills in children with Turner’s syndrome: An analysis of Hyperlexia. Cortex, 32(2), 335-345.
Tien, H. (1971). Hyperlexia, hypolexia, or dyslexia. Journal of Special Education, 5(3), 257-259.
Tirosh, E., & Canby, J. (1993). Autism with hyperlexia: A distinct syndrome. American Journal on Mental Retardation, 98(1), 84-92.
Treffert, D. (2010), Islands of Genius, Philadelphia, Jessica Kingsley Publisher
Treffert, D., (2011) Hyperlexia III: Separating ‘autistic-like’behaviors from autistic disorder; Assessing children who read early or speak late. Wisconsin Medical Journal, 110(6).
Treffert, D., Bartelt, K., Dardis, B., Mischler, B. (2017). Hyperlexia Manual: A guide to children who read early. The Treffert Center, Fond du Lac, WI. treffertcenter.com
Tsai, L.Y., & Scott-Miller, D. (1988). Higher-functioning autistic disorder. Focus on Autistic Behavior, 2(6).
Turkeltaub, P.E., Gareau, L., Lynn-Flowers, D., Zeffiero, T.A., & Eden, G.F. (2003). Development of neural mechanisms for reading. Nature Neuroscience, 1-7.
Turkeltaub, P.E., Lynn-Flowers, D., Verballs, A., Miranda, M., Gareau, L., & Eden, G.F. (2004). The neural basis of hyperlexic reading: An fMRI case study. Neuron, 41, 11-25.
Vicker, B., & Naremore, R. (2002). The wh- question test. Bloomington, IN: Indiana Resource Center for Autism.
Welsh, M.C., (1993). Hyperlexia and precocious reading. In Blanken, G., Dittman, J., Frimm, H., Marshal, J.C., & Wallesch, C.W. (Eds.) Linguistic Disorders and Pathologies: An International Handbook. NY: Walter de Gruyter.
Welsch, M.C., Pennington, B.F., & Rogers, S. (1987). Word recognition and comprehension skills in hyperlexic children. Brain and Language, 32, 76-96.
Whitehouse, D., & Harris, J. (1984). Hyperlexia in infantile autism. Journal of Autism and Developmental Disorders, 14, 281-189.
Wintner, B.S. (1993, December 30). Experts Are Finally Getting the Number on Hyperlexia. Chicago Daily Herald, Sec. 4, 1-2.
Wing, L. (1981). Asperger’s syndrome: A clinical account. Psychological Medicine, 11, 115-129.
Wing, L. (1975). A study of language impairments in severely retarded children. In N. O’Connor (Ed.), Language, Cognitive, Deficits and Retardation. London: Butterworths.
Wolinsky, H. (1995, July 9). Children with hyperlexia face a language barrier. Chicago Sun-Times, 61-65.
Ziegler, M.B. (1995). Hyperlexia: Review of Literature. Unpublished Literature Review. Center for Speech and Language Disorders, Elmhurst, IL.