Language delay

A language delay is a language disorder in which a child fails to develop language abilities at the usual age-appropriate period in their developmental timetable. It is most commonly seen in children from two years-old to the age of seven years-old and can sometimes continue into late childhood. The reported prevalence of language delay is not agreed upon and ranges from 2.3 to 19 percent.[1]

Language is a uniquely human form of communication that entails the use of words in a standard and structured way.[2] Language is distinct from communication. Communication is a two-stage process. The first stage is the process of encoding the message into a set of words (or signs in the case of Sign Languages) and sentence structures that convey the required meaning, i.e. into language. In the second stage, language is translated into motor commands that control the articulators (hands, face, body, lungs, vocal cords, mouth, tongue, teeth, etc.), thereby creating speech.

Language delays are distinct from speech delays, in which the development of the mechanical and motor aspects of speech production are delayed. Speech is the verbal motor production of language, while language is a means of communication.[1] Because language and speech are independent, they may be individually delayed. For example, a child may be delayed in speech (i.e., unable to produce intelligible speech sounds), but not delayed in language because they use a Sign Language.

A language delay is commonly divided into receptive and expressive categories. Receptive language refers to the process of understanding language. Expressive language refers to the use of sentences (made of words or signs) to communicate messages to others. Both categories are essential in developing effective communication.

Language delays are recognized by comparing language development of children to recognized developmental milestones. They are presented in a variety of ways, as every individual child has a unique set of language skills and deficiencies that are identifiable through many different screenings and tools. There are different causes leading to language delay; it is often a result of another developmental disorder and treatment requires analysis of the unique individual causes. The condition is frequently observed early on, among two- and three-year-olds.[3] Early language delays are only considered risk-factors in leading to more severe language disorders.[3]

Language Development

There are recognizable speech and language developmental milestones.[4] Language delays are often identified when a child strays from the expected developments in the timeline of typical speech and language developmental milestones that researchers agree on.[4] Children can stray slightly from the confines of the expected timeline, but, in the case that a child is observed to be largely straying from the expected timeline, the child's caretaker should consult with a medical specialist.

Timeline of typical speech and language developmental milestones

This timeline only provides a general outline of expected developments from birth to age five, individual children can still exhibit varying development patterns as this timeline only serves as a general guideline. This timeline is only one model, other models regarding language development exist.[2] The development of language remains a theoretical mystery.[5]

Newborn baby: No language skills developed yet, but is communicating through actions and sounds such as crying.

Around 2 months, babies can make “cooing" sounds.[4]

Around 4 months, babies can respond to voices.[4]

Around 6 months, babies begin to babble and respond to names.[4]

Around 9 months, babies begin to produce mama/dada - appropriate terms and are able to imitate one word at a time.[4]

Around 12 months, toddlers can typically speak one or more words. They can produce two words with meaning.[4]

Around 15 months, toddlers begin to produce jargon,[4] which is defined as "pre-linguistic vocalizations in which infants use adult-like stress and intonation".[6]

Around 18 months, toddlers can produce 10 words and follow simple commands.[4]

Around 24 months, toddlers begin to produce 2-3 words and phases that use "I", "Me", and "you", indicating possession.[4] They are about 25% intelligible.[4]

Around 3 years, toddlers are able to use language in numerical terms.

Language development in language delay

Early developmental language delay is characterized by slow language development in preschoolers.[3] Language development for children with language delay takes longer than the general timeline provided above.[7] It is not only slower, but also presents itself in different forms. For example, a child with a language delay could have weaker language skills such as the ability to produce phrases at 24 months-old.[7] They may find themselves producing language that is different from language norms in developing children.

Presentation

A language delay is most commonly identified around 18 months of age with an enhanced well-baby visit.[8] It presents itself in many forms and can be comorbid or develop as a result of other developmental delays. It is important to remember that language delays act and develop differently individually. Language delay is different than individual variation in language development, and is defined by children falling behind on the timeline for recognized milestones.[9]

Early signs and symptoms (red flags)

Language delay in children is associated with increased difficulty with reading, writing, attention, and/or socialization.[1] Children that do not effectively compare with their peers in these abilities and have drastic difficulties should see a physician.[1] Language delay could be present itself early on as a lack of communicative gestures or sounds.

For example, communicative tools might indicate language delay symptoms, such as:

  • Not smiling at 3 months-old
  • Not turning the head towards sounds at 4 months-old.
  • Not pointing at 15 months-old.
  • More specifically, not being able to produce around 10 words at 18 months-old.[10][11][12]

Later symptoms include:

  • A lack of speech.[1]
  • An inability to comprehend, process, or understand language presented to the child.[1]

Identification

Many different screening tools are available to identify language delay in young children. The Language Development Survey (LDS; developed by Rescorla[13]) is a 10 minute, parent-administered and simple tool to help identify language delays in children at two years-old.[14] It is a validated, suitable, and inexpensive screening tool that enables the early assessment of language delay.[14]

There is currently insufficient evidence in literature to suggest an argument for or against routine use of formal screening instruments in to detect language delay in all children.[1] However, if a child is not meeting expected language milestones, a comprehensive developmental evaluation is necessary.[1]

Complications

Language delay is a risk factor for other types of developmental delay, including social, emotional, and cognitive delay. Even though speech and language delays may affect a smaller portion of the population in children, it still can have an incredible impact on their life and their accomplishments in the future. Some of these include problems with behavior, difficulty with reading, and other issues related to spelling and low IQ scores.[15] Some children may grow out of these deficits, even coming to excel where they once lagged, while others do not. One particularly common result of language delay is delayed or inadequate acquisition of reading skills. Reading depends upon an ability to code and decode script (i.e., match speech sounds with symbols, and vice versa). If a child is still struggling to master language and speech, it is very difficult to learn another level of complexity (writing). Thus, it is crucial that children have facility with language to be successful readers.

Neuroscientist Steven Pinker postulated in 1999 that a certain form of language delay (dubbed "Einstein syndrome" by economist Thomas Sowell in 2001) may be associated with exceptional and innate analytical prowess in some individuals, such as Albert Einstein, Richard Feynman and Edward Teller.[16]

Causes

Language delays are the most frequent developmental delays, and can occur for many reasons. A delay can be due to being a “late bloomer”, “late talker”, or a more serious problem. The most common causes of speech delay include

Such delays can occur in conjunction with a lack of mirroring of facial responses, unresponsiveness or unawareness of certain noises, a lack of interest in playing with other children or toys, or no pain response to stimuli.[17][18] There are other causes to language delay.

  • Autism (a developmental disorder) - There is strong evidence that autism is commonly associated with language delay.[19][20] Asperger syndrome, which is on the autistic spectrum, however, is not associated with language delay.[21]
  • Being a twin or a younger sibling increases the chance of speech and language delays. Reasons for this are thought to include less one-on-one time with parents, premature birth with twins, and the companionship of their twin sibling reducing their motivation to talk to others.[22] With being a younger sibling, it can also be linked to less one on one time with their parents or guardians. Older siblings also tend to talk for their younger siblings, giving them less opportunities to grow their language skills.[23]
  • Gender and family history: Correlation with male sex, previous family history, and maternal education has been demonstrated.[24]
  • Genetic abnormalities - In 2005, researchers found a connection between expressive language delay and a genetic abnormality: a duplicate set of the same genes that are missing in sufferers of Williams-Beuren syndrome. Also so called XYY syndrome can often cause speech delay.[25]
  • Neonatal Brachial Plexus Palsy - There exists a high prevalence of early language delay exists among toddlers with neonatal brachial plexus palsy.[26]
  • Poverty - Poverty is a risk factor for language delay as a result of a lack of access appropriate therapies.[27] Socioeconomic adversities correlate with delayed language development.[28]
  • Psychosocial deprivation - The child doesn't spend enough time communicating with adults, such as babbling and joint attention. Research on early brain development shows that babies and toddlers have a critical need for direct interactions with parents and other significant care givers for healthy brain growth and the development of appropriate social, emotional, and cognitive skills.[29]
  • Television viewing - Excessive television viewing is associated with delayed language development. Children who watched television alone were 8.47 times more likely to have language delay when compared to children who interacted with their caregivers during television viewing.[30] Some educational television shows, such as Blue's Clues, have been found to enhance a child's language development.[31] But, as recommended by the American Academy of Pediatrics, children under the age of 2 should watch no television at all, and after age 2 watch no more than one to two hours of quality programming a day. Therefore, exposing such young children to television programs should be discouraged, especially television shows with no educational value.[31] Parents should engage children in more conversational activities to avoid television-related delays to their children language development, which could impair their intellectual performance. However, in a study conducted by Dr. Birken of the Hospital for Sick Children, it was found that watching television while interacting with a parent of caregiver is actually beneficial for children who are bilingual. The study spanned four years, from 2011 to 2015, and was based on parent report and clinician observation. Over the four years it was found that if a bilingual child had interaction with an adult while watching television they did not suffer language delay and it in fact helped them develop English, their second language.[32]
  • Symptoms of stress: Stress during pregnancy is associated with language delay.[33]
  • Chemical exposure during pregnancy.[34]

Treatment

Studies have failed to find clear evidence that a language delay can be prevented by training or educating health care professionals in the subject. Overall, some of the reviews show positive results regarding interventions in language delay, but are not curative.[35] To treat an already existing language delay a child would need Speech and Language Therapy to correct any deficits. These therapists can be found in schools, clinics, through home care agencies, and also colleges where Communication Sciences and Disorders are studied. Most young children with language delay recover to a normal range by five years of age.[3]

Aside from these, it is still encouraged for the child's parent to get involved. A few ways that a parent could get involved with helping to improve a child’s language and speech skills includes speaking to their child with enthusiasm, engaging in conversations revolving what the child is focusing on, and reading to their child frequently.[36]

Social and play skills appear to be more difficult for children with language delays due to their decreased experience in conversation. Speech Pathologists utilize methods such as prompting to improve a child's social skills through play intervention. While recent studies have consistently found play intervention to be helpful, further research is required in order to determine the effectiveness of this form of therapy.[37]

In regards to demographic factors causing language delay, specifically poverty, system-level changes improve access to treatment for children with language delay and allow them therapies.[27]

See also

References
  1. McLaughlin, Maura R. (2011-05-15). "Speech and Language Delay in Children". American Family Physician. 83 (10): 1183–1188. ISSN 0002-838X. PMID 21568252.
  2. Owens, Robert E. (2005). Language Development: An Introduction. Boston: Pearson. pp. 125–136.
  3. Whitehurst, G. J.; Fischel, J. E. (1994). "Practitioner review: early developmental language delay: what, if anything, should the clinician do about it?". Journal of Child Psychology and Psychiatry, and Allied Disciplines. 35 (4): 613–648. doi:10.1111/j.1469-7610.1994.tb01210.x. ISSN 0021-9630. PMID 8040218.
  4. "MCCQE 2000 Review Notes and Lecture Series Pediatrics 1 - PDF". docplayer.net. Retrieved 2019-10-20.
  5. Taylor, Christine M. (1999). "Review : An examination of the development of language in the normal child". Journal of Child Health Care. 3 (1): 35–38. doi:10.1177/136749359900300105. ISSN 1367-4935. PMID 10451332.
  6. Sroufe, L. Alan (1996). Child development : its nature and course /. McGraw-Hill. ISBN 9780070605701.
  7. "MCCQE 2000 Review Notes and Lecture Series Pediatrics 1 - PDF". docplayer.net. Retrieved 2019-10-20.
  8. "MCCQE 2000 Review Notes and Lecture Series Pediatrics 1 - PDF". docplayer.net. Retrieved 2019-10-20.
  9. Wooles, Nicola; Swann, Joanna; Hoskison, Emma (2018-01-01). "Speech and language delay in children: a case to learn from". British Journal of General Practice. 68 (666): 47–48. doi:10.3399/bjgp17X694373. ISSN 0960-1643. PMC 5737311. PMID 29284642.
  10. Gavin Bremner, J.; Wachs, Theodore D. (2011-08-02). The Wiley-Blackwell Handbook of Infant Development, Volume 2: Applied and Policy Issues. ISBN 9781444351842.
  11. Buckley, Sue; Sacks, Ben (2001). An Overview of the Development of Infants with Down Syndrome (0-5 Years). ISBN 9781903806029.
  12. Crocetti, Michael; Barone, Michael A.; Oski, Frank A. (2004). Oski's Essential Pediatrics. ISBN 9780781737708.
  13. Rescorla, Leslie (1989). "The Language Development Survey". Journal of Speech and Hearing Disorders. 54 (4): 587–599. doi:10.1044/jshd.5404.587. ISSN 0022-4677. PMID 2811339.
  14. Mossabeb, Roschanak; Wade, Kelly C.; Finnegan, Kathryn; Sivieri, Emidio; Abbasi, Soraya (2012). "Language Development Survey Provides a Useful Screening Tool for Language Delay in Preterm Infants". Clinical Pediatrics. 51 (7): 638–644. doi:10.1177/0009922812439244. PMID 22399570 – via Sage Journals.
  15. US Preventive Services Task Force (2006). "Screening for speech and language delay in preschool children: Recommendation statement". Pediatrics. 117 (2): 497–501. doi:10.1542/peds.2005-2766. PMID 16452370.
  16. Pinker, Steven (24 June 1999). "His Brain Measured Up". The New York Times. Archived from the original on 11 December 2006. Retrieved 2006-12-04.
  17. "Language Learning Styles". TLG. August 2013. Archived from the original on 23 August 2013. Retrieved 22 August 2013.
  18. "Frequently Asked Questions". American Academy of Children & Adolescent Psychiatry. Retrieved 22 August 2013.
  19. Miniscalco, C; Nygren, G; Hagberg, B; Kadesjö, B; Gillberg, C (May 2006). "Neuropsychiatric and neurodevelopmental outcome of children at age 6 and 7 years who screened positive for language problems at 30 months" (PDF). Developmental Medicine & Child Neurology. 48 (5): 361–6. doi:10.1017/S0012162206000788. hdl:2077/851. PMID 16608544.
  20. Hagberg BS, Miniscalco C, Gillberg C (2010). "Clinic attenders with autism or attention-deficit/hyperactivity disorder: cognitive profile at school age and its relationship to preschool indicators of language delay". Research in Developmental Disabilities. 31 (1): 1–8. doi:10.1016/j.ridd.2009.07.012. PMID 19713073.
  21. American Psychiatric Association (2000). "Diagnostic criteria for 299.00 Autistic Disorder". Diagnostic and statistical manual of mental disorders: DSM-IV (4 ed.). Washington, DC: American Psychiatric Association. ISBN 0-89042-025-4. OCLC 768475353.
  22. "Do Twins Talk to Each Other in a Secret Language?". Twin Pickle. 2017-11-07. Retrieved 2018-03-06.
  23. Turnbull, Khara; Justice, Laura (2017). Language Development from Theory to Practice (Third ed.). Pearson.
  24. Campbell, T F; Dollaghan, C A; Rockette, H E; Paradise, J L; Feldman, H M; Shriberg, L D; Sabo, D L; Kurs-Lasky, M (2002). "Risk factors for speech delay of unknown origin in 3-year-old children" (PDF). Child Development. 74 (2): 346–57. doi:10.1111/1467-8624.7402002. PMID 12705559.
  25. "47,XYY syndrome".
  26. Chang, Kate Wan-Chu; Yang, Lynda J.-S.; Driver, Lynn; Nelson, Virginia S. (2014-09-01). "High Prevalence of Early Language Delay Exists Among Toddlers With Neonatal Brachial Plexus Palsy". Pediatric Neurology. 51 (3): 384–389. doi:10.1016/j.pediatrneurol.2014.04.021. ISSN 0887-8994. PMC 4792271. PMID 25160543.
  27. Brown, Courtney M.; Beck, Andrew F.; Steuerwald, Wendy; Alexander, Elizabeth; Samaan, Zeina M.; Kahn, Robert S.; Mansour, Mona (2016-02-01). "Narrowing Care Gaps for Early Language Delay: A Quality Improvement Study". Clinical Pediatrics. 55 (2): 137–144. doi:10.1177/0009922815587090. ISSN 0009-9228. PMC 4788473. PMID 25994319.
  28. O'Hare, Anne; Bremner, Lynne (2016). "Management of developmental speech and language disorders: Part 1". Archives of Disease in Childhood. 101 (3): 272–277. doi:10.1136/archdischild-2014-307394. ISSN 1468-2044. PMID 26208514.
  29. Committee on Public Education (August 1999). "Media education". Pediatrics. 104 (2 Pt 1): 341–3. doi:10.1542/peds.104.2.341. PMID 10429023.
  30. Chonchaiya, W; Pruksananonda, C (July 2008). "Television viewing associates with delayed language development". Acta Paediatrica. 97 (7): 977–82. doi:10.1111/j.1651-2227.2008.00831.x. PMID 18460044.
  31. Bavelier, Daphne; Green, Shawn; Dye, Matthew (2010). "Children, wired – for better and for worse". Neuron. 67 (5): 692–701. doi:10.1016/j.neuron.2010.08.035. PMC 3170902. PMID 20826302.
  32. Akpan, N (2017-05-04). "Toddler's Screen Time Linked to Slower Speech Development". PBS. PBS. Retrieved 1 December 2018.
  33. Talge, NM; Neal, C; Glover, V (2007). "Antenatal maternal stress and long-term effects on child neurodevelopment: how and why?". Journal of Child Psychology and Psychiatry. 48 (3–4): 245–61. doi:10.1111/j.1469-7610.2006.01714.x. PMID 17355398.
  34. Repouskou, Anastasia; Papadopoulou, Anastasia-Konstantina; Panagiotidou, Emily; Trichas, Panagiotis; Lindh, Christian; Bergman, Åke; Gennings, Chris; Bornehag, Carl-Gustaf; Rüegg, Joëlle; Kitraki, Efthymia; Stamatakis, Antonios (2020-06-09). "Long term transcriptional and behavioral effects in mice developmentally exposed to a mixture of endocrine disruptors associated with delayed human neurodevelopment". Scientific Reports. 10 (1): 9367. doi:10.1038/s41598-020-66379-x. ISSN 2045-2322.
  35. Commentary - Early Identification of Language Delays, 2005.
  36. Klass, Perri (2010). "When to worry if a child has too few words". The Hamilton Spectator. The Hamilton Spectator.
  37. Sualy, Abbey; Yount, Sara; Kelly-Vance, Lisa; Ryalls, Brigette (2011). "Using a play intervention to improve the play skills of children with a language delay". International Journal of Psychology: 105–122 – via PsychINFO.

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