Grapheme-phoneme Conversion Research Articles

How word semantics and phonology affect handwriting of Alzheimer’s patients: A machine learning based analysis

Using kinematic properties of handwriting to support the diagnosis of neurodegenerative disease is a real challenge: non-invasive detection techniques combined with machine learning approaches promise big steps forward in this research field. In literature, the tasks proposed focused on different cognitive skills to elicitate handwriting movements. In particular, the meaning and phonology of words to copy can compromise writing fluency. In this paper, we investigated how word semantics and phonology affect the handwriting of people affected by Alzheimer’s disease. To this aim, we used the data from six handwriting tasks, each requiring copying a word belonging to one of the following categories: regular (have a predictable phoneme–grapheme correspondence, e.g., cat), non-regular (have atypical phoneme–grapheme correspondence, e.g., laugh), and non-word (non-meaningful pronounceable letter strings that conform to phoneme–grapheme conversion rules). We analyzed the data using a machine learning approach by implementing four well-known and widely-used classifiers and feature selection. The experimental results showed that the feature selection allowed us to derive a different set of highly distinctive features for each word type. Furthermore, non-regular words needed, on average, more features but achieved excellent classification performance: the best result was obtained on a non-regular, reaching an accuracy close to 90%.

Exposure to dialect variation in an artificial language prior to literacy training impairs reading of words with competing variants but does not affect decoding skills.

Many bidialectal children grow up speaking a variety (e.g., a regional dialect) that differs from the variety in which they subsequently acquire literacy. Previous computational simulations and artificial literacy learning experiments with adults have demonstrated lower accuracy in reading contrastive words for which dialect variants exist compared with noncontrastive words without dialect variants. At the same time, exposure to multiple varieties did not affect learners' ability to phonologically decode untrained words; in fact, longer literacy training resulted in a benefit from dialect exposure as competing variants in the input may have increased reliance on grapheme-phoneme conversion. However, these previous experiments interleaved word learning and reading/spelling training, yet children typically acquire substantial oral language knowledge prior to literacy training. Here we used artificial literacy learning with adults to examine whether the previous findings replicate in an ecologically more valid procedure where word learning precedes literacy training. We also manipulated training conditions to explore interventions thought to be beneficial for literacy acquisition, such as providing explicit social cues for variety use and literacy training in both varieties. Our findings replicated the reduced accuracy for reading contrastive words in those learners who had successfully acquired the dialect variants prior to literacy training. This effect was exacerbated when literacy training also included dialect variation. Crucially, although no benefits from the interventions were found, dialect exposure did not affect reading and spelling of untrained words suggesting that phonological decoding skills can remain unaffected by the existence of multiple word form variants in a learner's lexicon. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

"Orthographic forms affect speech perception in a second language: Consonant and vowel length in L2 English": Correction to Bassetti et al. (2021).

Reports an error in "Orthographic forms affect speech perception in a second language: Consonant and vowel length in L2 English" by Bene Bassetti, Jackie Masterson, Tania Cerni and Paolo Mairano (Journal of Experimental Psychology: Human Perception and Performance, 2021[Dec], Vol 47[12], 1583-1603). In the article, there are several editorial production errors. Jackie Masterson's ORCID iD (https://orcid.org/0000-0003-2869-6612) was missing, and the awardees for Grant RPG 2013 180 were listed incorrectly. This grant was awarded to Bene Bassetti and Jackie Masterson. In the sixth paragraph of The Present Study section, the parenthetical text in the fifth sentence was corrected to read "(for example, the ie in pie has seven readings, Carney, 1994)." Other small typographical errors were fixed, several references were correctly reordered, and one supplemental materials file was removed. The online version of this article has been corrected. (The following abstract of the original article appeared in record 2022-13139-001.) ItalianL1 speakers of EnglishL2 produce the same English sound as longer if spelled with two than with one letter, following Italian grapheme-phoneme conversion rules. Do Italian listeners perceive short and long sounds in English homophonic word pairs that are spelled with a single letter or a digraph (finish-Finnish; morning-mourning)? In Experiment 1, 50 ItalianL1-EnglishL2 bilinguals and 50 English controls performed a Consonant Perception task and a Vowel Perception Task. They heard English homophonic word pairs containing a target sound spelled with one or two letters and indicated whether the two words contained the same sounds or not. For half of the listeners a picture was used to activate target words (Auditory-Visual Input group). Bilinguals in this group perceived different sounds in homophonic pairs. Experiment 2 tested whether naturalistic exposure reduces orthographic effects on speech perception by comparing learners, sequential bilinguals, and English controls (all n = 30) with Auditory-Visual Input. Orthographic form (spelling) affected consonant perception in both of the second language listener groups. Learners were less affected than bilinguals. Analyses indicated that this was because of the learners' high proficiency. It appears that ItalianL1 speakers of EnglishL2 make a long-short contrast for consonants-unattested in English-and illusorily perceive it in spoken English homophonous words. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Mlphon: A Multifunctional Grapheme-Phoneme Conversion Tool Using Finite State Transducers

In this article we present the design and the development of a knowledge based computational linguistic tool, Mlphon [em.el.foːɳ] for Malayalam language. Mlphon computationally models linguistic rules using finite state transducers and performs multiple functions including grapheme to phoneme (g2p) and phoneme to grapheme (p2g) conversions, syllabification, phonetic feature analysis and script grammar check. This open source software tool, released under MIT license, is developed as a one-stop solution to handle different speech related text processing tasks for automatic speech recognition, text to speech synthesis and non-speech natural language processing tasks including syllable subword based language modeling, phoneme diversity analysis and text sanity check. The tool is evaluated on a manually crafted gold standard lexicon. Mlphon performs orthographic syllabification with 99% accuracy with a syllable error rate of 0.62% on the gold standard lexicon. For grapheme to phoneme conversion task, overall phoneme recognition accuracy of 99% with a phoneme error rate of 0.55% is obtained on gold standard lexicon. Additionally an extrinsic evaluation of Mlphon is performed by employing the pronunciation lexicon created using Mlphon, in Malayalam automatic speech recognition (ASR) task. Performance analysis in terms of the computation time of lexicon creation process and the word error rate (WER) on ASR task are presented along with a comparison over other automated tools for lexicon creation. Pronunciation lexicons with more than 100k commonly used Malayalam words in phonemised and syllabified forms is created and they are published as open language resources along with this work. We also demonstrate the usage of Mlphon on different natural language processing applications - syllable subword ASR, assisted pronunciation learning, phoneme diversity analysis and text sanity check. Being a knowledge based solution with open source code, Mlphon can be adapted to other languages of similar script nature.

Orthographic forms affect speech perception in a second language: Consonant and vowel length in L2 English.

ItalianL1 speakers of EnglishL2 produce the same English sound as longer if spelled with two than with one letter, following Italian grapheme-phoneme conversion rules. Do Italian listeners perceive short and long sounds in English homophonic word pairs that are spelled with a single letter or a digraph (finish-Finnish; morning-mourning)? In Experiment 1, 50 ItalianL1-EnglishL2 bilinguals and 50 English controls performed a Consonant Perception task and a Vowel Perception Task. They heard English homophonic word pairs containing a target sound spelled with one or two letters and indicated whether the two words contained the same sounds or not. For half of the listeners a picture was used to activate target words (Auditory-Visual Input group). Bilinguals in this group perceived different sounds in homophonic pairs. Experiment 2 tested whether naturalistic exposure reduces orthographic effects on speech perception by comparing learners, sequential bilinguals, and English controls (all n = 30) with Auditory-Visual Input. Orthographic form (spelling) affected consonant perception in both of the second language listener groups. Learners were less affected than bilinguals. Analyses indicated that this was because of the learners' high proficiency. It appears that ItalianL1 speakers of EnglishL2 make a long-short contrast for consonants-unattested in English-and illusorily perceive it in spoken English homophonous words. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Dual-stage and dual-deficit? Word recognition processes during text reading across the reading fluency continuum

Central questions in the study of visual word recognition and developmental dyslexia are whether early lexical activation precedes and supports decoding (a dual-stage view) or not (dual-route view), and the locus of deficits in dysfluent reading. The dual-route view predicts early word frequency and length interaction, whereas the dual-stage view predicts word frequency effect to precede the interaction effect. These predictions were tested on eye movements data collected from (n = 152) children aged 9–10 among whom reading dysfluency was overrepresented. In line with the dual-stage view, the results revealed an early word frequency effect in first fixation duration followed by robust word length effect in refixation probability and an interaction of word frequency and word length in summed refixation duration. This progression was advanced in fluent reading to be observable already in first fixation duration. Poor reading fluency was mostly explained by inflated first fixation durations, and to stronger word frequency and length effects in summed refixation duration. This pattern of results suggests deficits in early letter encoding and slowness in serial grapheme-phoneme conversion. In contrast to the widely held belief, the holistic orthographic processing of words seemed to be intact.

Pseudoword spelling ability predicts response to word spelling treatment in acquired dysgraphia

ABSTRACT Although rehabilitation of acquired dysgraphia can be quite effective, identifying predictors of responsiveness to treatment is useful for prognosis and individualization of treatment protocols. This study examined whether various features of treatment response were predicted by the integrity of one or more of the central cognitive components of spelling: orthographic long-term memory, orthographic working memory, and phoneme-grapheme conversion. Twenty dysgraphic individuals received 12 weeks of bi-weekly, individualized, lexically-based spelling rehabilitation using a spell-study-spell paradigm. Linear multiple regression modelling examined whether the type and severity of the dysgraphic deficit, assessed before rehabilitation, predicted the magnitude and rate of improvement, generalization to untrained items and maintenance of treatment gains. The results revealed that pseudoword spelling accuracy – indexing the integrity of the phoneme-grapheme conversion system – was the only factor examined that significantly predicted the rate of accuracy gains for trained words as well as the extent of generalization to untrained words. Pre-treatment pseudoword spelling accuracy also predicted retention of gains for trained and untrained words at 3-month follow-up. These findings reveal that the integrity of the phoneme-grapheme conversion system prior to dysgraphia rehabilitation may play a key role in rehabilitation-driven recovery, even when the treatment approach targets lexical rather than pseudoword spelling processes.

The ability to learn new written words is modulated by language orthographic consistency.

IntroductionIt is well known that a difficulty in forming lexical representations is a strong predictor of reading and spelling difficulties even after controlling for the effects of other cognitive skills. Our study had two main interrelated aims. First, we wanted to examine whether the ability to learn new written words (lexical learning) varies as a function of the orthographic consistency of the language of the learner. Second, we wanted to evaluate the cognitive abilities involved in orthographic lexical learning and whether they differed as a function of language consistency.Method163 Italian children and 128 English children performed a lexical learning task as well as tasks assessing several cognitive skills potentially related to the ability to establish orthographic representations.ResultsWe found that children learning an orthographic inconsistent orthography (English) were better able to learn novel written words presented in association with pictures than children learning a consistent orthography (Italian). This was true for both younger and older primary school children and also when children were matched for school grade. Lexical learning may be better in English children because the many irregularities of this language promote storing in memory whole-word representations and processing larger orthographic units. In Italian, instead, reading can be accomplished successfully on the basis of grapheme-phoneme conversion rules and on processing smaller orthographic units. This interpretation was supported by the pattern of cognitive skills associated with lexical learning skills in the two languages. Variations in lexical learning were explained by spatial visual memory and phonological awareness tasks in both languages, but phonological STM explained further variance in Italian, while a task tapping visuo-attentional capacity explained further variance in English.ConclusionLearning a language with inconsistent orthography is associated with better lexical learning skills in children at different stages of primary school; the pattern of cognitive skills associated with lexical learning skills is also partially modulated by orthographic consistency.

Enseñanza de la lectura y escritura: una mirada desde la conciencia fonológica y la escritura emergente

This work seeks to collect information on the teaching of reading and writing considering the phonological awareness and emerging writing. When we teach reading and writing, it’s important to be clear about the teaching method, which should contemplate visual perceptual processes, phonological awareness, grapheme-phoneme conversion rules and orthographic, syntactic and semantic levels, as this will mark success or failure in the future, since reading is more than doing a decoding process. Phonological awareness is the key to acquiring an alphabetic code and  thanks to the transparency of the Spanish language and its phonological system, we can move from decoding to understanding more quickly. In addition, it will be very important to consider children’s writing levels to strengthen phonological awareness. Therefore, the emergent writing will accompany from the conscience of the written language to the decoding, where the phonologicalawareness will configure a threshold of the formal learning.&nbsp

Chapter 4 - Developmental dyslexia: A new look at clinical features and brain mechanisms

Developmental dyslexia is the commonest "specific learning disorder" (DSM-5) or "developmental learning disorder with impairment in reading" (ICD-11). This impairment in reading acquisition is related to a defect in the installation of cognitive precursors necessary to master the grapheme-phoneme conversion. Its origin is largely genetic, but many environmental factors seem capable of modulating symptom intensity. Three types of presentation, roughly equal in occurrence, are useful to distinguish according to the associated disorders (language, attentional, and/or motor coordination), thus suggesting, at least in part, potentially different mechanisms at their origin. In adolescence and adulthood the clinical presentation tends to bear a more uniform pattern, covering a large range of severity depending on each person's ability to compensate for their deficit. Research has demonstrated dysfunction of specific brain areas during reading-related tasks (using fMRI), essentially in the left cerebral hemisphere, but also atypical patterns of connectivity (using diffusion imaging), further supplemented by functional connectivity studies at rest. The current therapeutic recommendations emphasize the need for multidisciplinary care, giving priority, depending on the clinical form, to the language, psychomotor, or neuropsychologic aspects of rehabilitation. Various training methods whose effectiveness has been scientifically tested are reviewed, emphasizing those exploiting the hypothesis of a lack of intermodal connectivity between separate cognitive systems.

Indicadores cognitivo-linguístico em escolares com transtorno fonológico de risco para a dislexia

Introdução: O transtorno fonológico caracteriza-se por uma desorganização da fala que prejudica o desenvolvimento da linguagem, sendo um dos principais sinais de risco para a dislexia, uma vez que, as habilidades fonológicas que deveriam se desenvolver de forma natural e espontânea, para a aquisição da linguagem oral, não foram adquiridas. Esta quebra na aquisição pode dificultar o desenvolvimento das demais habilidades, como análise, síntese, segmentação e manipulação fonêmica, influenciando na aquisição do mecanismo de conversão fonema-grafema para o aprendizado da leitura e da escrita. Objetivo: Este estudo tem como objetivo identificar os indicadores cognitivo-linguísticos em escolares com transtorno fonológico de risco para a dislexia. Método: Participaram deste estudo 40 escolares do 1º ano do ensino fundamental, com idade entre 5 anos e 11 meses a 6 anos e 7 meses. Os escolares foram divididos em dois grupos, GI: composto por 20 escolares sem transtorno fonológico e GII: composto por 20 escolares com transtorno fonológico, ambos os grupos foram submetidos à aplicação do Protocolo de Avaliação das Habilidades Cognitivo-Linguísticas - versão coletiva e individual, composto por habilidades de leitura, escrita, consciência fonológica, processamento auditivo e velocidade de processamento. Resultados: Os resultados apresentaram diferença estatisticamente significante para os subtestes de todas as habilidades avaliadas, demonstrando que os escolares do grupo GI apresentaram médias de desempenho superior quando comparados com os escolares do grupo GII. Conclusão: Conclui-se que o desempenho inferior de GII nas habilidades avaliadas indica uma limitação cognitivo-linguística desses escolares quando comparados com os escolares do GI, evidenciando os sinais de risco para a dislexia.

Grapheme-Phoneme Conversion in Korean Word Recognition: Evidence from Event-Related Potentials

Grapheme-Phoneme Conversion in Korean Word Recognition: Evidence from Event-Related Potentials

Pseudoword spelling ability predicts responsiveness to treatment for spelling words

Pseudoword spelling ability predicts responsiveness to treatment for spelling words

Augev Method and an Innovative Use of Vocal Spectroscopy in Evaluating and Monitoring the Rehabilitation Path of Subjects Showing Severe Communication Pathologies

A strongly connotative element of developmental disorders (DS) is the total or partial impairment of verbal communication and, more generally, of social interaction. The method of Vocal-verb self-management (Augev) is a systemic organicistic method able to intervene in problems regarding verbal, spoken and written language development successfully. This study intends to demonstrate that it is possible to objectify these progresses through a spectrographic examination of vocal signals, which detects voice phonetic-acoustic parameters. This survey allows an objective evaluation of how effective an educational-rehabilitation intervention is. This study was performed on a population of 40 subjects (34 males and 6 females) diagnosed with developmental disorders (DS), specifically with a diagnosis of the autism spectrum disorders according to the DSM-5. The 40 subjects were treated in “la Comunicazione” centers, whose headquarters are near Bari, Brindisi and Rome. The results demonstrate a statistical significance in a correlation among the observed variables: supervisory status, attention, general dynamic coordination, understanding and execution of orders, performing simple unshielded rhythmic beats, word rhythm, oral praxies, phono-articulatory praxies, pronunciation of vowels, execution of graphemes, visual perception, acoustic perception, proprioceptive sensitivity, selective attention, short-term memory, segmental coordination, performance of simple rhythmic beatings, word rhythm, voice setting, intonation of sounds within a fifth, vowel pronunciation, consonant pronunciation, graphematic decoding, syllabic decoding, pronunciation of caudate syllables, coding of final syllable consonant, lexical decoding, phoneme-grapheme conversion, homographic grapheme decoding, homogeneous grapheme decoding, graphic stroke.

Relação entre Fluência e Compreensão Leitora em estudantes de 4º e 5º ano do Ensino Fundamental

Sustentado em pressupostos teóricos psicolinguísticos no tocante ao processamento cognitivo da leitura, inclusive e especialmente por meio dos modelos Bottom-up e Top-down e Dupla Rota e, ainda, em estudos de revisão de literatura que tratam da relação entre fluência e compreensão leitora, este estudo objetiva avaliar a relação entre fluência e compreensão leitora. Avaliou-se a fluência leitora por meio do critério tempo de conversão grafema-fonema e a compreensão leitora por meio de respostas escritas de questões abertas de compreensão. Participaram 27 estudantes do 4º e do 5º ano do Ensino Fundamental, entre 9 e 12 anos, de ambos os sexos, de uma escola pública no interior da Bahia. Observamos uma correlação negativa forte entre as duas variáveis estudadas (r = - 0,70), pois, quanto maior a compreensão leitora, menor foi o tempo levado para a leitura. A velocidade de leitura mostrou-se relevante para a compreensão até a conversão entre 5 e 6 grafemas por segundo. Ao que parece, a falta de reconhecimento automático dos grafemas impõe maior custo de processamento cognitivo, ou seja, o processamento pelas vias fonológica e ascendente parece consumir a gama essencialmente limitada de recursos cognitivos da memória de trabalho. Como consequência, não restam recursos cognitivos para o acesso ao significado. Conjecturamos que a demora de conversão dos grafemas em fonemas, como vimos neste estudo, indício de processamento serial e uso preferencial da rota fonológica e da via ascendente, não colabora para o processamento cognitivo em paralelo e para a leitura compreensiva.

Shared Book Reading Promotes Not Only Language Development, But Also Grapheme Awareness in German Kindergarten Children

Effects of shared book reading on expressive vocabulary and grapheme awareness without letter instruction in German kindergarteners (longitudinal; N = 69, 3;0–4;8 years) were investigated. Expressive vocabulary was measured by using a standardized test; grapheme awareness was measured by asking children to identify one grapheme per trial presented amongst non-letter distractors. Two methods of shared book reading were investigated, literacy enrichment (additional books) and teacher training in shared book reading strategies, both without explicit letter instruction. Whereas positive effects of shared book reading on expressive vocabulary were evident in numerous previous studies, the impact of shared book reading on grapheme awareness has not yet been investigated. Both methods resulted in positive effects on children’s expressive vocabulary and grapheme awareness over a period of 6 months. Thus, early shared book reading may not only be considered to be a tool for promoting the development of expressive vocabulary, but also for implicit acquisition of grapheme awareness. The latter is considered an important precondition required for the explicit learning of grapheme–phoneme conversion rules (letter knowledge).

Neural substrates of sublexical processing for spelling

We used fMRI to examine the neural substrates of sublexical phoneme-grapheme conversion during spelling in a group of healthy young adults. Participants performed a writing-to-dictation task involving irregular words (e.g., choir), plausible nonwords (e.g., kroid), and a control task of drawing familiar geometric shapes (e.g., squares). Written production of both irregular words and nonwords engaged a left-hemisphere perisylvian network associated with reading/spelling and phonological processing skills. Effects of lexicality, manifested by increased activation during nonword relative to irregular word spelling, were noted in anterior perisylvian regions (posterior inferior frontal gyrus/operculum/precentral gyrus/insula), and in left ventral occipito-temporal cortex. In addition to enhanced neural responses within domain-specific components of the language network, the increased cognitive demands associated with spelling nonwords engaged domain-general frontoparietal cortical networks involved in selective attention and executive control. These results elucidate the neural substrates of sublexical processing during written language production and complement lesion-deficit correlation studies of phonological agraphia.

Word-Decoding Skill Interacts With Working Memory Capacity to Influence Inference Generation During Reading.

The aim of this study was to examine predictions derived from a proposal about the relation between word-decoding skill and working memory capacity, called verbal efficiency theory. The theory states that poor word representations and slow decoding processes consume resources in working memory that would otherwise be used to execute high-level comprehension processes, such as the generation of inferences. Previous research has yielded inconsistent findings about the importance of word decoding in adult readers, and the hypothesis has never been tested experimentally. Verbal efficiency theory was tested in this experiment by manipulating the difficulty of grapheme-phoneme conversion and assessing the extent to which readers made bridging inferences. Participants read two-sentence passages and then responded to lexical decision targets. Some of the passages required a bridging inference to integrate the first and second sentences. Decoding difficulty was manipulated such that the second sentence in some passages was written using pseudohomophones. Participants also received tasks to assess their working memory capacity and decoding ability. Inference priming was found in both the Standard American English and pseudohomophone contexts but was stronger in the former than in the latter. The advantage in priming for the Standard English relative to the pseudohomophone condition was predicted by an interaction between decoding skill and working memory capacity. Poor decoders who scored high on the span tests were less impaired by the pseudohomophone manipulation than were poor decoders who scored low on the tests. The results suggest that working memory capacity compensates for poor decoding skills even among proficient adult readers.

Spelling difficulties in Spanish-speaking children with dyslexia / Dificultades de escritura en niños españoles con dislexia

In addition to reading difficulties, a significant proportion of developmental dyslexics have spelling problems, which persist into adulthood. Studies carried out in languages with opaque orthographies have found that dyslexics frequently make phonological substitutions when spelling and have difficulties in developing orthographic representations of irregular words. Those errors seem to derive from an excessive use of phonological codes when writing. Minimal research in Spanish (relatively transparent orthography) about the relationship between dyslexia and spelling difficulties has been carried out to date. In this study, 19 Spanish-speaking developmental dyslexics (from 7 to 11 years old) and 28 controls (from 6 to 11 years old, distributed in two groups, one matched for age and the other for reading level with the dyslexics) performed a dictation task of 80 stimuli with different levels of orthographic consistency, in order to discover the codes they use in the writing process. Results showed that Spanish children with dyslexia made significantly more spelling errors, especially among the ruled and irregular words. These findings are consistent with the idea that these children have difficulties in developing orthographic representations and use phonological codes more frequently than non-dyslexics, resulting in phonologically plausible errors when writing irregular words. These results have important implications for the treatment of spelling difficulties in children with dyslexia, highlighting the need to focus on the correct acquisition of grapheme-phoneme conversion rules as well as the development of appropriate orthographic representations.

Literacy after cerebral hemispherectomy: Can the isolated right hemisphere read?

ObjectivesCerebral hemispherectomy, a surgical procedure undergone to control intractable seizures, is becoming a standard procedure with more cases identified and treated early in life [33]. While the effect of the dominant hemisphere resection on spoken language has been extensively researched, little is known about reading abilities in individuals after left-sided resection. Left-lateralized phonological abilities are the key components of reading, i.e., grapheme–phoneme conversion skills [1]. These skills are critical for the acquisition of word-specific orthographic knowledge and have been shown to predict reading levels in average readers as well as in readers with mild cognitive disability [26]. Furthermore, impaired phonological processing has been implicated as the cognitive basis in struggling readers. Here, we explored the reading skills in participants who have undergone left cerebral hemispherectomy. MethodsSeven individuals who have undergone left cerebral hemispherectomy to control intractable seizures associated with perinatal infarct have been recruited for this study. We examined if components of phonological processing that are shown to reliably separate average readers from struggling readers, i.e., phonological awareness, verbal memory, speed of retrieval, and size of vocabulary, show the same relationship to reading levels when they are mediated by the right hemisphere [2]. ResultsWe found that about 60% of our group developed both word reading and paragraph reading in the average range. Phonological processing measured by both phonological awareness and nonword reading was unexpectedly spared in the majority of participants. Phonological awareness levels strongly correlated with word reading. Verbal memory, a component of phonological processing skills, together with receptive vocabulary size, positively correlated with reading levels similar to those reported in average readers. Receptive vocabulary, a bilateral function, was preserved to a certain degree similar to that of strongly left-lateralized phonological skills [3]. Later seizure onset was associated with better reading levels. ConclusionsWhen cerebral hemispherectomy is performed to control seizures associated with very early (in utero) insult, it has been found that the remaining right hemisphere is still able to support reading and phonological processing skills that are normally mediated by the left hemisphere. Our results also suggest the existence of variability in individuals after hemispherectomy, even within groups having the same etiology and similar timing of insult.