Written Language Disorders

See the Written Language Disorders (School-Age) Evidence Map for pertinent scientific evidence, expert opinion, and client/caregiver perspective.

The scope of this Practice Portal page is limited to written language disorders (i.e., disorders of reading and writing) in preschool and school-age children (3–21 years old). It can be understood best in relation to the companion Practice Portal on Spoken Language Disorders.

A disorder of written language involves a significant impairment in fluent word reading (i.e., reading decoding and sight word recognition), reading comprehension, written spelling, and/or written expression (Ehri, 2000; Gough & Tunmer, 1986; Kamhi & Catts, 2012; Tunmer & Chapman, 2007, 2012). A word reading disorder is also known as dyslexia.

An appropriate assessment and treatment of written language disorders often incorporates interprofessional education/interprofessional practice (IPE/IPP). Members of the interprofessional practice team may include, but are not limited to, the following:

  • reading specialist
  • occupational therapist
  • special educator
  • learning specialist
  • physical therapist
  • speech-language pathologist
  • “English as a second language” teacher

Written language disorders, as with spoken language disorders, can involve any or a combination of the five language domains (i.e., phonology, morphology, syntax, semantics, and pragmatics) as well as the spelling system of a language, or orthography. Problems can occur in the awareness, comprehension, and production of language at the phonemic, syllable, word, sentence, and discourse levels, as indicated below (Nelson, 2014; Nelson et al., 2015). In cases of dyslexia, phonological processing problems are a core deficit (Hogan et al., 2005; Seidenberg, 2017). See ASHA's resources on Disorders of Reading and Writing and Language In Brief for further information.

Sound-, Syllable-, and Word-Level Difficulties

  • Difficulty with phonological and morphological structures of words
  • Difficulty forming stable associations with the orthographic representations of words and letters in print
  • Impaired reading decoding and written spelling skills

Sentence- and Discourse-Level Difficulties

  • Difficulty recognizing discourse components
  • Difficulty using syntax and cohesive devices to represent relationships among ideas
  • Impaired reading comprehension and formulation of academic discourse (narrative and expository) and social communication

A relationship may exist between language disorders and learning disabilities, as indicated in the following definition of specific learning disability:

The term “specific learning disability” means a disorder in one or more of the psychological processes involved in understanding or in using language, spoken or written, which may manifest itself in an imperfect ability to listen, speak, read, write, spell, or do mathematical calculations. (Individuals with Disabilities Education Improvement Act of 2004)

A learning disability label may be used once academic struggles with reading and writing are identified, even though the underlying issue is a language disorder (Sun & Wallach, 2014).

A written language disorder may occur in the presence of other conditions, such as the following:

  • spoken language disorder
  • attention-deficit/hyperactivity disorder
  • emotional disability
  • intellectual disability
  • deaf or hard of hearing
  • autism spectrum disorder

Relationship Between Spoken and Written Language in Alphabetic Systems

There are strong relationships between spoken and written language, such as the role of phonological awareness in decoding as well as the roles of vocabulary and syntax in reading (e.g., Hulme & Snowling, 2013; Kamhi & Catts, 2012). These relationships are underscored in the simple (or narrow) view of reading, which includes decoding and linguistic comprehension as the primary components (Gough & Tunmer, 1986). Understanding the relationships of spoken and written language is key to developing reading comprehension skills (Tunmer & Chapman, 2012) as well as developing automatic retrieval (for spelling) and automatic identification (for reading; Ehri, 2014; Richards et al., 2006).

Children need strong knowledge of both spoken and written language in order to be successful readers and writers. Children with spoken language problems frequently have difficulty learning to read and write, and conversely, children with reading and writing problems often have difficulty with spoken language (Kamhi & Catts, 2012). For more details, see the Practice Portal page on Spoken Language Disorders; see also Language In Brief and Disorders of Reading and Writing.

Reading

Reading is the process by which an individual constructs meaning by transforming printed symbols in the form of letters or visual characters into recognizable words. Components of reading are outlined in the following definitions:

  • Word recognition—the ability to identify words when reading, either through word decoding or sight word identification
    • Phonological decoding—the ability to transform letter strings into the phonological components of a corresponding spoken word
    • Sight word identification—automatic visual recognition of a word and its meaning
  • Reading fluency—the ability to recognize and read words within a text with accuracy, using appropriate intonation, rhythm, and speed
    • Reading fluency is affected by reading automaticity, which is the ability to read a list of words serially and accurately within a specified time.
    • Reading fluency combines rapid decoding and sight word identification.
  • Reading comprehension—the ability to understand the meaning of written text
    • Comprehension includes vocabulary knowledge, using morphological structures of written words to extract word meaning, using cues to “unpack” complex syntax, and understanding different discourse structures (e.g., fiction or expository text).
    • Comprehension requires executive function skills (e.g., the ability to use prior knowledge and make inferences and predictions, the ability to monitor one’s reading comprehension).

For information about research supporting the five key components of reading instruction (i.e., phonemic awareness, phonics, fluency, vocabulary, and text comprehension), see the National Reading Panel report (National Institute of Child Health and Human Development, 2000).

Writing

Writing is the process of communicating ideas using printed symbols in the form of letters or visual characters, which make up words. Words are formulated into sentences; these sentences are organized into larger paragraphs and often into different discourse genres (narrative, expository, persuasive, poetic, etc.).

Writing includes the following:

  • Writing process—the ability to plan, organize, draft, reflect on, revise, and edit written text; the ability to address specific audience needs and convey the purpose of the text (e.g., persuasion)
  • Written product—the end product of the writing process

The written product may be described in terms of the following components:

  • Word level—word choice, spelling, morphology
  • Sentence level—syntax and complexity, content and punctuation
  • Text level—organizational structure, coherence and cohesiveness
  • Writing conventions—capitalization and punctuation of a written product
  • Communication functions—to inform, to persuade
  • Organizational structure—chronological, sequential, compare and contrast
  • Effectiveness in meeting the information needs of the audience

Handwriting difficulties can have an impact on a child’s ability to spell words in writing, express thoughts adequately in writing, and complete writing tasks in a timely manner. Developmental handwriting difficulties are associated with deficits in orthographic coding, which involves mapping the abstract representation of letters to the motor movements used to write words (McCloskey & Rapp, 2017). It is important to provide accommodations during assessment and for instruction if the child or adolescent has been diagnosed as or is suspected of having a handwriting disorder. Occupational therapists can be consulted on a case-by-case basis to recommend appropriate accommodations (e.g., permitting use of a keyboard or providing a scribe). However, handwriting is not only a motor skill; it is also a written language skill, and handwriting instruction may be integrated with reading and writing instruction when appropriate.

Spelling

Spelling, or phonological encoding, is the process of mapping from phoneme to grapheme to spell the spoken word in written form. Spelling requires the ability to segment words into phonemes (units of sound that distinguish one word from another, e.g., /k/ as in /kʌp/) and the ability to map those phonemes onto graphemes (units of letters that represent sounds, e.g., “c” as in “cup”) in the correct order in written form. Words may be spelled regularly (i.e., follow traditional spelling conventions) or irregularly (i.e., do not follow traditional spelling conventions). In addition, children learn spelling or graphotactic rules often taught through phonics instruction (Treiman, 2018). Only about 4% English words are irregular, and English spelling is more predictable when considering language of origin and history, meaning and part(s) of speech, speech sound spelling patterns, and word position constraints (Moats, 2005/2006).

Difficulty or progress in either spelling or the foundational language knowledge areas that support it can influence word-level reading, reading comprehension, and writing composition (Apel, 2009). Given the interconnectedness of spelling and the language areas above, spelling ability affects other areas of literacy. This interconnectedness also helps explain why individuals could be adept at reading and still have challenges with spelling and/or writing. 

Foundational language knowledge areas that support spelling include the following:

  • Phonological knowledge—the conscious and active recognition and manipulation of individual sounds (phonemes) in words. It supports spelling when phonological knowledge is used to segment words into individual phonemes to spell unknown words (Kamhi & Catts, 2012).
  • Orthographic knowledge—the understanding of how oral language is represented in writing (Apel, 2011; Apel et al., 2019)
    • Orthographic pattern knowledge includes the set of patterns or conventions that govern the translation of speech into print. This may include knowledge of letter sounds (e.g., “j,” “g,” “gde” for /ʤ/), permissible letter combinations (e.g., “qu,” not “qw”), rules for spelling roots and base words (e.g., “strike” and “made” have a long vowel and a silent “e”), and positional constraints for letters across word positions (e.g., “pr” is typically found only in initial and medial positions).
    • Mental graphemic representations (MGRs) or mental orthographic images refer to mental images of written words or word parts stored in the mental orthographic lexicon. When MGRs or mental orthographic images are strong, spellers (and readers) perform fluently and accurately without expending cognitive energy for composition or decoding.
  • Semantic knowledge relates to the recognition of how meaning impacts spelling. Writers use semantic knowledge to explicitly consider how spelling is influenced by meaning, and vice versa (“there”/“their”/“they’re”). With this knowledge, writers can choose accurate spellings of words to convey their intended meaning (Kamhi & Catts, 2012).
  • Morphological knowledge helps spellers direct explicit attention to the morphemic structure of words. This includes changes that occur when morphemes are added to base words (“hop” to “hopped,” doubling the “p”), the relationship between morphological word families (“read”: “reread,” “reader,” “nonreader,” “reading,” “reads,” “unreadable”), and recognition of the fixed spelling of affixes (anti–, sub–, –ed, –ness; Kamhi & Catts, 2012).

Spelling depends on phonological awareness, orthographic pattern awareness, and semantic/morphological awareness; conscious (explicitly taught) and subconscious (statistically learned) knowledge of phonological, orthographic, and morphological representations of words and their parts; the development of orthographic representations (also called “MGRs” and “mental images”) of specific words and word parts in long-term memory (called the orthographic lexicon); and the ability to create mental models of their interrelationships (e.g., Apel & Masterson, 2001; Berninger et al., 2008; Bourassa & Treiman, 2001; Ehri, 2000; Masterson & Apel, 2007).

Reading and Writing Across Languages and in Dual Language Learners (DLLs)

Writing systems across languages vary in their spelling-to-sound relations or grapheme–phoneme consistency. Extensive research indicates that readers in consistent or shallow orthographies (e.g., Spanish, Finnish, Greek) have an advantage during the early stages of reading for the establishment of spelling-to-sound relations or decoding (Caravolas et al., 2019; Seymour et al., 2003; Spencer & Hanley, 2004). DLLs can effectively learn to read and write across languages following a biliteracy approach (August & Shanahan, 2006; Butvilofsky et al., 2016). For DLLs with reading difficulties, biliteracy can afford the benefits of a shallow orthography during the early stages of reading. That is, the consistency in spelling-to-sound relations can facilitate decoding and phonological awareness in struggling DLL readers.

Content Disclaimer: The Practice Portal, ASHA policy documents, and guidelines contain information for use in all settings; however, members must consider all applicable local, state and federal requirements when applying the information in their specific work setting.

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