Written language and reading: Complete guide for speech therapists

1. Fundamental prerequisites for learning to read

Learning to read cannot occur ex nihilo. It requires prior mastery of a set of fundamental skills that constitute the pillars upon which the ability to decode and understand written text will be built. These prerequisites, developed progressively during early childhood, are interconnected and mutually influence each other in a dynamic process of cognitive maturation.

Oral language is the absolute foundation of any learning of written language. A child must have a sufficiently rich vocabulary, master basic syntactic structures, and develop solid oral comprehension skills. This linguistic foundation allows for making sense of the decoded words and understanding the texts read. Research shows that a delay in oral language at 3-4 years old is a significant risk factor for later school learning.

Phonological awareness is undoubtedly the most determining prerequisite for success in reading. This metalinguistic ability allows the child to perceive, analyze, and manipulate the sound units of language (words, syllables, rhymes, phonemes). It develops progressively, from awareness of words to that of phonemes, and constitutes the cognitive bridge between oral and written language.

Visual and visuospatial skills also play a crucial role. The child must develop fine visual discrimination to distinguish similar letters (b/d, p/q), stable spatial orientation to maintain reading direction, and effective visual memory to quickly recognize frequent words. These skills develop progressively through manipulation activities, coloring, puzzles, and visual games.

2. The cognitive processes of reading: theoretical models and practical applications

Understanding the cognitive processes involved in reading is the essential theoretical foundation for any effective speech therapy intervention. The models developed by cognitive psychology allow for a detailed analysis of the mechanisms at play and precisely identify the breaking points in children facing difficulties.

The dual-route model, developed by Coltheart and his collaborators, remains the reference for understanding the mechanisms of reading isolated words. This model postulates the existence of two complementary and relatively independent reading procedures: the phonological route (or assembly) and the lexical route (or addressing). Each route has specific characteristics and preferentially processes certain types of words.

The phonological route, also called the assembly route, allows reading through systematic decoding. It transforms each grapheme into phoneme according to the grapho-phonemic correspondence rules of the language. This route is essential for reading new words, pseudowords, and regular words. It is the route of learning par excellence and must be mastered as a priority by novice readers.

The lexical route, or addressing route, allows for the global recognition of words stored in memory. It treats words as familiar visual forms and allows direct access to meaning without going through phonological mediation. This route is essential for efficiently reading frequent and irregular words (like "women," "onion," "mister") that cannot be correctly read by simply applying grapho-phonemic rules.

Expert readers use these two pathways flexibly and in coordination depending on the context and characteristics of the encountered words. This cognitive flexibility is one of the markers of reading expertise and explains the fluency and efficiency of accomplished readers. The development of this coordination between the pathways represents a major therapeutic goal in speech therapy.

3. Developmental stages of reading acquisition

The acquisition of reading follows a relatively universal developmental progression, although the individual pace can vary significantly. Understanding these stages allows speech therapists to adapt their interventions to the child's developmental level and identify any blockages in the normal progression.

The logographic phase, which precedes formal learning, is characterized by a global recognition of certain words based on prominent visual cues. The child recognizes their name, familiar logos (McDonald's, Coca-Cola), and a few words from the environment, but without a true analysis of the internal structure of words. This recognition relies on visual and contextual memorization strategies rather than an understanding of the alphabetic principle.

The transition to the alphabetic phase marks the true beginning of reading acquisition. The child gradually discovers and internalizes the alphabetic principle: letters represent sounds of spoken language. This revolutionary awareness paves the way for systematic decoding and the autonomous learning of new words. This phase is often accompanied by a temporary regression in reading speed, as the child abandons their logographic strategies to prioritize letter-by-letter decoding.

The orthographic phase represents the culmination of learning, characterized by the gradual formation of a mental orthographic lexicon. The child stores in memory the orthographic representations of encountered words, allowing for immediate recognition without resorting to decoding. This automation frees cognitive resources for comprehension and allows access to expert reading.

It is crucial to understand that these phases are not strictly sequential but overlap and coexist. A child may use logographic strategies for some very familiar words while decoding other words alphabetically. This coexistence of strategies reflects the complexity of the learning process and the need for a differentiated pedagogical approach.

4. Specific Written Language Disorders: Classification and Clinical Manifestations

Specific written language disorders constitute a complex set of persistent difficulties that affect the acquisition and mastery of reading and writing, despite normal intellectual abilities and appropriate teaching. These disorders, of neurobiological origin, require a fine understanding of their manifestations to allow for accurate differential diagnosis and appropriate management.

Developmental dyslexia represents the most common and well-documented disorder. It is characterized by persistent and significant difficulties in acquiring reading skills, which cannot be explained by intellectual, sensory, or acquired neurological deficits, or by unfavorable socio-economic conditions. Dyslexia affects about 5 to 10% of the school population, with a slightly higher prevalence in boys.

The traditional classification distinguishes three main subtypes of dyslexia according to performance profiles on reading tests. Phonological dyslexia is characterized by a predominant impairment of the assembly pathway, manifesting as particular difficulties with pseudowords and new words. These children may develop compensatory strategies for familiar words but remain in great difficulty with unknown words.

Surface dyslexia, less common, results from a preferential impairment of the addressing pathway. These children correctly decode regular words and pseudowords but experience specific difficulties with irregular words that they regularize (reading "femmes" as /fèmes/). This profile, rarer in French than in English due to the orthographic characteristics of our language, may go unnoticed in early learning.

Mixed dyslexia combines the difficulties of both reading pathways and often represents the most severe form. These children present global difficulties in reading, affecting both regular and irregular words as well as pseudowords. This profile requires intensive and multimodal intervention to gradually develop skills in both reading pathways.

Dysorthography frequently accompanies dyslexia but can also present in isolation. It is characterized by persistent difficulties in acquiring and mastering spelling, affecting both common spelling and grammatical spelling. The observed errors often reflect the failing mechanisms: phonological errors (omissions, substitutions of phonemes), visual errors (letter confusions), morpho-syntactic errors (agreements, conjugations).

5. Evaluation methods and diagnostic tools in speech therapy

The evaluation of written language disorders constitutes a complex and multidimensional process that requires a systematic approach and reliable standardized tools. This evaluation aims to precisely identify the failing mechanisms, quantify the extent of difficulties, and guide the most appropriate remediation strategies.

The evaluation of phonological awareness remains a central element of the assessment, given its predictive role in written learning. The tests should explore the different levels of phonological awareness, from syllabic awareness to phonemic awareness, including awareness of rhymes and onsets. Standardized tests such as the phonological awareness tests of BELEC or the subtests of BALE allow for fine and comparative evaluation.

The evaluation of reading itself must differentially explore the two reading pathways. Reading regular words, irregular words, and pseudowords allows for identifying the specific profile of each child and characterizing the type of dyslexia. Measuring accuracy (number of errors) and speed (words per minute) provides essential quantitative indicators for diagnosis and monitoring progress.

The evaluation of reading comprehension is an essential aspect that is often overlooked. Decoding difficulties can mask specific comprehension disorders, and conversely, good comprehension abilities can partially compensate for decoding difficulties. Using texts adapted to the decoding level allows for a specific evaluation of comprehension skills.

The evaluation of spelling should explore the different types of errors and the underlying mechanisms. The analysis of phonologically plausible errors (phonetic transcription errors) versus phonologically implausible errors (omissions, substitutions) provides insight into the integrity of the different processes. The evaluation should include lexical spelling (isolated words) and spelling in context (spontaneous writing).

Clinical observation complements standardized tests and provides valuable qualitative information. The analysis of strategies used, compensatory mechanisms, fatigue, motivation, and reactions to failure significantly enriches the quantitative evaluation and guides therapeutic choices.

6. Intervention Strategies and Remediation Methods

Speech therapy intervention in written language disorders is based on scientifically validated principles and must adapt to the specific profile of each child. The effectiveness of remediation largely depends on the timeliness of the intervention, its intensity, structuring, and duration. Research converges to highlight the importance of an explicit, systematic, and multimodal approach.

The principle of early intervention is a fundamental element of the intervention. The earlier the support begins in the learning process, the more likely it is to be effective. Preventive intervention in the last year of kindergarten or the beginning of first grade helps prevent the establishment of lasting difficulties and maintains the child's motivation. Prevention programs targeting phonological awareness show remarkable effectiveness in reducing the incidence of reading disorders.

The intensity of the intervention largely determines its effectiveness. Research suggests that an intervention of 3 to 4 sessions per week during the initial phases of remediation is optimal. This intensity helps maintain the learning dynamic and quickly consolidate achievements. Gradual spacing of sessions can then allow for transfer and generalization of skills.

Working on phonological awareness remains central, particularly for children with phonological dyslexia. The intervention should systematically progress from the broadest units (syllables) to the finest (phonemes), using visual and kinesthetic supports to enhance auditory perception. The use of tokens, colored cubes, and associated gestures facilitates the mental manipulation of phonological units.

The teaching of grapho-phonemic correspondences must be explicit, progressive, and cumulative. Progression generally follows the order of frequency and regularity: simple vowels, common consonants, and then gradually complex graphemes and contextual rules. Each new correspondence must be systematically practiced in reading and writing to promote the bidirectionality of learning.

The development of fluency is a major goal that is often overlooked. Repeated reading of adapted texts, training in the rapid recognition of frequent words, and timed reading exercises help automate decoding processes and free up cognitive resources for comprehension. Echo reading techniques, guided reading, and theatrical reading prove to be particularly effective.

7. Development of spelling vocabulary and word memory

Building a solid mental spelling vocabulary is one of the major challenges of learning to write, particularly for dyslexic children. This repertoire of stored orthographic representations in memory allows for the automatic recognition of familiar words and forms the foundation of expert reading. Its development requires specific strategies and intensive training.

Memorizing irregular words presents a particular challenge in French. These words, which cannot be correctly read by simply applying grapho-phonemic rules, require storage in memory of their complete orthographic form. The intervention must use multisensory strategies: detailed visual analysis, oral spelling, repeated writing, mnemonic associations.

The morphological approach proves to be particularly effective for developing spelling vocabulary. Identifying morphemes (prefixes, roots, suffixes) allows for grouping words into families and facilitates their memorization. This approach is particularly relevant for sophisticated and technical words that children encounter in school texts starting from cycle 3.

The use of innovative digital tools like COCO THINKS and COCO MOVES allows for systematic and progressive training of spelling vocabulary. These applications offer varied exercises in recognition, spelling, and memorization, with automatic adjustment of difficulty based on the child's performance.

The analysis of spelling errors provides valuable information about the strategies used and the failing mechanisms. Phonologically plausible errors indicate a preferential reliance on the phonological route, while visual errors suggest a fragility of the stored spelling representations. This analysis finely guides therapeutic choices.

8. Reading comprehension: specialized strategies and interventions

Reading comprehension represents the ultimate goal of any written learning, but it can be hindered by decoding difficulties or can itself be a specific area of difficulty. Speech therapy intervention must simultaneously develop decoding skills and comprehension strategies, taking into account their dynamic interaction.

The Gough and Tunmer reading comprehension model (simple reading formula) posits that written comprehension results from the product of decoding skills and oral comprehension skills. This formula highlights the importance of developing these two components in parallel and explains why some children may experience comprehension difficulties despite correct decoding.

Explicit teaching of comprehension strategies is a cornerstone of intervention. These metacognitive strategies allow readers to control and optimize their understanding. Activating prior knowledge, formulating hypotheses, questioning the text, synthesizing, and checking comprehension should be taught explicitly and systematically.

The development of vocabulary is an essential prerequisite for comprehension. Lexical impoverishment significantly limits the understanding of texts, particularly from cycle 3 where school texts use increasingly specialized vocabulary. The intervention should aim for both quantitative and qualitative enrichment of vocabulary, prioritizing the teaching of high-frequency words and specialized terms.

Adapting texts may be necessary to allow dyslexic children to access meaning despite their decoding difficulties. This adaptation can involve layout (spacing, font, colors), vocabulary (lexical simplification), syntax (shorter sentences), or length (shorter texts). The goal is to maintain access to meaning while continuing to develop decoding skills.

9. Digital technologies and reading assistance tools

The integration of digital technologies into the speech therapy management of written language disorders opens up new and particularly promising therapeutic perspectives. These tools allow for intensive, personalized, and motivating training, while providing immediate feedback and automatic adjustment of difficulty based on the child's performance.

Specialized applications like COCO THINKS and COCO MOVES revolutionize the traditional approach to remediation by offering gamified exercises that maintain children's engagement and motivation over long training periods. These tools enable targeted work on the different components of reading: phonological awareness, grapho-phonemic correspondences, fluency, spelling lexicon, and comprehension.

Reading assistance technologies provide valuable compensatory solutions for dyslexic children. Text-to-speech allows access to the content of texts despite decoding difficulties, speech recognition facilitates written production, and word prediction tools reduce the cognitive load related to spelling. These technical aids should be integrated gradually and accompanied by specific learning.

Cognitive remediation software specifically targets the underlying executive functions related to learning: attention, working memory, cognitive flexibility, inhibition. These programs allow for targeted training of these transversal functions that partly determine the success of school learning. The effectiveness of this training on reading performance is the subject of active research.

Virtual and augmented reality opens new perspectives for speech therapy intervention. These technologies allow for the creation of immersive and motivating learning environments, particularly suited for children of the digital generation. The initial developments in this field show encouraging results for engagement and effectiveness of interventions