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ISSN: 1023-5086

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ISSN: 1023-5086

Scientific and technical

Opticheskii Zhurnal

A full-text English translation of the journal is published by Optica Publishing Group under the title “Journal of Optical Technology”

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DOI: 10.17586/1023-5086-2020-87-10-81-88

УДК: 612.84; 612.843.7; 004.93; 621.397.3

Global and local mechanisms of perception of “compound letters”

For Russian citation (Opticheskii Zhurnal):

Шелепин Е.Ю., Скуратова К.А.Глобальные и локальные механизмы восприятия «составных букв» // Оптический журнал. 2020. Т. 87. № 10. С. 81–88. http://doi.org/10.17586/1023-5086-2020-87-10-81-88

 

Shelepin E. Yu. and SkuratovaK. A. Global and local mechanisms of perception of “compound letters" [in Russian] // Opticheskii Zhurnal. 2020. V. 87. № 10. P. 81–88. http://doi.org/10.17586/1023-5086-2020-87-10-81-88  

 

For citation (Journal of Optical Technology):
E. Yu. Shelepin and K. A. Skuratova, "Global and local mechanisms of perception of “compound letters”," Journal of Optical Technology . 87(10), 619-623 (2020). https://doi.org/10.1364/JOT.87.000619  
Abstract:

This study describes an algorithm of temporal interaction of spatial mechanisms for global and local analysis in recognition of “compound letters” by second-grade students including some with speech disorders. A method of “compound letters” was used that models some properties of reading without line-by-line text scanning. Large “compound letters” are composed of small letters. Large “compound letters” are congruent if they are composed of the same letters; otherwise, they are incongruent. The test subject was asked to recognize either a large (global task) or a small (local task) letter in the “compound letter” and press the corresponding button. The number of correct/incorrect responses and the reaction time were registered. The responses of second-grade students with and without speech disorders were compared. The percentage of correct responses in recognition of large and small, congruent and incongruent letters was identical, but the response times were different for these groups of test subjects. The temporal properties of interaction of vision system channels that are responsible for local and global analysis during text recognition and speech production were assumed to be important.

Keywords:

vision, "composite letters," image recognition, local and global analysis, reading, speech, reading training, dyslexia

OCIS codes: 330.1070, 330.4270, 100.4996, 170.6960, 330.5020

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