Orthographic Processing of Developmental Dyslexic Children in China: Evidence from an Event-Related Potential Study

Abstract

Objective

This study aimed to explore the orthographic processing of simplified Chinese characters in developmental dyslexic children in Kashgar, Xinjiang, China, and provide a theoretical basis for intervention strategies for developmental dyslexia in Chinese.

Methods

Using event-related potential (ERP) measures, 18 developmental dyslexic children and 23 typically developing children performed a character decision task with three types of stimuli: real characters (RCs), pseudocharacters (PCs), and noncharacters (NCs).

Results

Behavioral results showed that the control children displayed a faster and higher accurate performance than the dyslexic children across PCs and NCs. ERP data revealed that the RCs and PCs elicited a stronger P200 than the NCs. Compared with the RCs and NCs, children in the control group showed more N400 negatives for PCs. It is worth mentioning that dyslexic children did not show any difference on N400, which reflected the insufficient orthographic processing of dyslexic children in China.

Conclusion

These results show that Chinese dyslexic children had orthographic processing defects.

Keywords

developmental dyslexia / orthographic processing / radical position / simplified Chinese characters / event-related potential

References

[1] WHO. International Classification of Diseases (ICD-11). https://icd.who.int/browse11/l-m/en#/http://id.who.int/icd/entity/1008636089, 2018.

[2] SnowlingM, BishopDV, StothardSE. Is preschool language impairment a risk factor for dyslexia in adolescence?. J Child Psychol Psychiatry, 2000, 41(5): 587-600

[3] DietzNAE, JonesKM, GareauL, et al.. Phonological decoding involves left posterior fusiform gyrus. Hum Brain Mapp, 2005, 26(2): 81-93

[4] ZhaoS, LiZ, ZhangJ, et al.. Prevalence and Associated Risk Factors of Dyslexic Children in a Middle-Sized City of China: A Cross-Sectional Study. PLoS One, 2013, 8(2): e56688

[5] LiuL, WangJ, ShaoS, et al.. Descriptive epidemiology of prenatal and perinatal risk factors in a Chinese population with reading disorder. Sci Rep, 2016, 6: 36697

[6] ChanDW, HoCSH, TsangSM, et al.. Prevalence, gender ratio and gender differences in reading-related cognitive abilities among Chinese children with dyslexia in Hong Kong. Educ Stud, 2007, 33(2): 249-265

[7] ZhaoH, ZhangB, ChenY, et al.. Environmental Risk Factors in Han and Uyghur Children with Dyslexia: A Comparative Study. PLoS One, 2016, 11(7): e0159042

[8] SiokWT, NiuZ, JinZ, et al.. A structural-functional basis for dyslexia in the cortex of Chinese readers. P Natl Acad Sci USA, 2008, 105(14): 5561-5566

[9] BonteML, BlomertL. Developmental dyslexia: ERP correlates of anomalous phonological processing during spoken word recognition. Cogn Brain Res, 2004, 21(3): 360-376

[10] HoCSH, ChanDW, ChungKKH, et al.. In search of subtypes of Chinese developmental dyslexia. J Exp Child Psychol, 2007, 97(1): 61-83

[11] HoCSH, ChanDWO, LeeSH, et al.. Cognitive profiling and preliminary subtyping in Chinese developmental dyslexia. Cognition, 2004, 91(1): 43-75

[12] TanLH, SpinksJA, EdenGF, et al.. Reading depends on writing, in Chinese. P Natl Acad Sci USA, 2005, 102(24): 8781-8785

[13] HoCSH, ChanDWO, TsangSM, et al.. The cognitive profile and multiple-deficit hypothesis in Chinese developmental dyslexia. Dev Psychol, 2002, 38(4): 543-553

[14] MengX, TianX, JianJ, et al.. Orthographic and phonological processing in Chinese dyslexic children: an ERP study on sentence reading. Brain Res, 2007, 1179: 119-130

[15] TzengYL, HsuCH, HuangYC, et al.. The Acquisition of Orthographic Knowledge: Evidence from the Lexicality Effects on N400. Front Psychol, 2017, 8: 433

[16] TzengYL, HsuCH, LinWH, et al.. Impaired Orthographic Processing in Chinese Dyslexic Children: Evidence From the Lexicality Effect on N400. Sci Stud Read, 2018, 22(1): 85-100

[17] ChungKKH, TongX, Mcbride-ChangC. Evidence for a deficit in orthographic structure processing in Chinese developmental dyslexia: An event-related potential study. Brain Res, 2012, 1472: 20-31

[18] CaoF, YanX, SprayGJ, et al.. Brain Mechanisms Underlying Visuo-Orthographic Deficits in Children With Developmental Dyslexia. Front Hum Neurosci, 2018, 12: 490

[19] WangZ, YanX, LiuY, et al.. Structural and functional abnormality of the putamen in children with developmental dyslexia. Neuropsychologia, 2019, 130: 26-37

[20] TsaiJL, KlieglR, YanM. Parafoveal semantic information extraction in traditional Chinese reading. Acta Psychol (Amst), 2012, 141(1): 17-23

[21] ZhaiM, ChenHC, YipMCW. Stroke Encoding Processes of Chinese Character During Sentence Reading. Exp Psychol, 2020, 67(1): 31-39

[22] BlackML, WiseCA, WangW, et al.. Combining genetics and population history in the study of ethnic diversity in the People’s Republic of China. Hum Biol, 2006, 78(3): 277-293

[23] Network KGI. About Kashi. http://www.kashi.gov.cn/Category_9/Index.aspx:2018-12-29.

[24] LiuB, JinZ, QingZ, et al.. The processing of phonological, orthographical, and lexical information of Chinese characters in sentence contexts: an ERP study. Brain Res, 2011, 1372: 81-91

[25] ZouL, DesrochesAS, LiuY, et al.. Orthographic facilitation in Chinese spoken word recognition: an ERP study. Brain Lang, 2012, 123(3): 164-173

[26] XuGF, ZhouCL, XiongYM, et al.. Reduced Intellectual Ability in Offspring of Ovarian Hyperstimulation Syndrome: A Cohort Study. EBioMedicine, 2017, 20: 263-267

[27] HouF, QiL, LiuL, et al.. Validity and Reliability of the Dyslexia Checklist for Chinese Children. Front Psychol, 2018, 9: 1915

[28] Institute Ioltotbl. Modern Chinese Frequency Dictionary. Beijing Language College Press (Chinese), 1986.

[29] SiokWT, SpinksJA, JinZ, et al.. Developmental dyslexia is characterized by the co-existence of visuospatial and phonological disorders in Chinese children. Curr Biol, 2009, 19(19): R890-R892

[30] ZhouW, XiaZ, BiY, et al.. Altered connectivity of the dorsal and ventral visual regions in dyslexic children: a resting-state fMRI study. Front Hum Neurosci, 2015, 9: 495

[31] GeJ, PengG, LyuB, et al.. Cross-language differences in the brain network subserving intelligible speech. P Natl Acad Sci USA, 2015, 112(10): 2972-2977

[32] SiokWT, PerfettiCA, JinZ, et al.. Biological abnormality of impaired reading is constrained by culture. Nature, 2004, 431(7004): 71-76

[33] MengX, JianJ, ShuH, et al.. ERP correlates of the development of orthographical and phonological processing during Chinese sentence reading. Brain Res, 2008, 1219: 91-102

[34] ChungKKH, LoJCM, McbrideC. Cognitive-linguistic profiles of Chinese typical-functioning adolescent dyslexics and high-functioning dyslexics. Ann Dyslexia, 2018, 68(3): 229-250

[35] PleischG, KaripidisII, BremA, et al.. Simultaneous EEG and fMRI reveals stronger sensitivity to orthographic strings in the left occipito-temporal cortex of typical versus poor beginning readers. Dev Cogn Neurosci, 2019, 40: 100717

[36] LuoX, KongR, LiuLF, et al.. Development of Orthographic Awareness, Morphological Awareness and Rapid Automatized Naming of Elementary-level Students in China: A Longitudinal Analysis from Grades 1 to 4. Curr Med Sci, 2018, 38(2): 336-341

[37] LuniewskaM, ChylK, DębskaA, et al.. Children With Dyslexia and Familial Risk for Dyslexia Present Atypical Development of the Neuronal Phonological Network. Front Neurosci, 2019, 13: 1287

[38] Martínez-GarcíaC, Suárez-CoallaP, CuetosF. Development of orthographic representations in Spanish children with dyslexia: the influence of previous semantic and phonological knowledge. Ann Dyslexia, 2019, 69(2): 186-203