wessam mohamed | Imam Abdulrahman bin Faisal University (original) (raw)

Papers by wessam mohamed

Research paper thumbnail of Behavioral and Cortical Indices of Typical and Atypical Development of Reading and Spelling Skills in Children: Evidence from Different Orthographies

deposit.ddb.de

It is a pleasure to express my deepest gratitude to those who made this thesis possible Thomas El... more It is a pleasure to express my deepest gratitude to those who made this thesis possible Thomas Elbert, my "Dr. Vater", your mentorship was paramount in encompassing me with all care and support from the preliminary to the concluding level. You encouraged me not only to grow as a researcher, but also to develop my own individuality and independence. For me, you have been always a model with rounded experiences from whom I learn. Thomas, for believing me and believing in me, for everything you have done for me, Thank you. Karin Landerl, To you, I owe my deepest gratitude for giving me this unique opportunity of being my second supervisor and a collaborator in my favorite part of this work (study 1 and study 2). It was my day when I first discussed my work with you at the ICP, 2008. I thank you for your assistance and guidance in getting this project started on the right foot by inspiring it with your work and needed materials. I do highly appreciate your thorough revisions and input which brought the papers to a great depth. For your encouragement, trust, tolerance of my mistakes and interest in my work, I am not just delighted, but honored to be one of your scholars and future collaborators. Brigitte Rockstroh, I am very grateful that you allocated your time to review my work. Thank you.

Research paper thumbnail of Abnormal Oscillatory Brain Responses in Dyslexic children with Poor Categorical Perception

life science journal, 2015

The condition of dyslexia has been associated with problems in speech perception, particularly in... more The condition of dyslexia has been associated with problems in speech perception, particularly in the processing of speech signals (e.g., phonemes). Speech signals contain information on different time scales. For instance, while rapid spectral changes as formant transitions may occur on time scale (20-40ms), syllabic and prosodic information occur on a time scale of (150-300ms). Therefore, the segmentation of the auditory stream into discrete representations is a prerequisite for speech perception, According to Peoppel (2003); the input speech signal has a neural representation that is bilaterally symmetric at an early representational level; however it is elaborated asymmetrically in the time domain. Consequently, it has suggested that temporal integration in different windows is reflected as oscillatory neuronal activity in different frequency bands. In this study, we are testing if the temporal integration is reflected as oscillatory activity in different frequency bands by mapp...

Research paper thumbnail of Does Enhancing Visual Perception in Mild Intellectually Disabled Children transfer to other skills?

This work examines the effectiveness of two training programs (teacher-assisted versus computer-b... more This work examines the effectiveness of two training programs (teacher-assisted versus computer-based) to enhance the visual perception of mild intellectually disabled children native Arabic children in Egypt. Subjects were randomly assigned to three groups: control group with treatment as usual (n=12), traditional/teacher-assisted training (n=12) and a computerized training (n=12). Groups were matched for socio-demographic variables controlling for age, gender, and the education of parents. The success of the different training procedures was evaluated by Frosting Developmental Test of Visual Perception and its transfer to other skills in the same modality (List of Reading Readiness Skills) and general improvement in cognitive abilities (The Stanford-Binet Test). Both programs significantly improved performances of the experimental groups compared to the control group. Yet, no significant differences were found between the two active training groups, suggesting that a computerized trainings may be an option to assist challenged children, particularly when there are no specialized teachers available for the highly time consuming trainings. These findings are discussed in terms of neurological plasticity as well as recommendations for integrated training programs.

Research paper thumbnail of The development of reading and spelling abilities in the first 3 years of learning Arabic

Reading and Writing, 2010

Research paper thumbnail of An Epidemiological Survey of Specific Reading and Spelling Disabilities in Arabic Speaking Children in Egypt

Literacy Studies, 2014

While the relationship between reading and spelling disabilities has been reported for many Europ... more While the relationship between reading and spelling disabilities has been reported for many European orthographies, very few studies have been conducted on other types of orthographies. The current chapter studies the relationship between reading and spelling deficits in Arabic based on an epidemiological survey of these deficits in Arabic-speaking children in Egypt. We screened a sample of 1106 Arabic-speaking third graders for their reading and spelling abilities. The prevalence rate for combined deficits in reading as well as spelling was high (12.6 %), but very low for isolated deficits in reading (0.9 %) or spelling (1.1 %). Importantly, we observed less dissociation of reading and spelling in vowelized Arabic compared to shallow orthographies such as German. This finding has implications for word processing in Arabic and it highlights the need for further studies of both typical and atypical development of literacy skills in Arabic-speaking children.

Research paper thumbnail of Behavioral and Cortical Indices of Typical and Atypical Development of Reading and Spelling Skills in Children: Evidence from Different Orthographies

deposit.ddb.de

It is a pleasure to express my deepest gratitude to those who made this thesis possible Thomas El... more It is a pleasure to express my deepest gratitude to those who made this thesis possible Thomas Elbert, my "Dr. Vater", your mentorship was paramount in encompassing me with all care and support from the preliminary to the concluding level. You encouraged me not only to grow as a researcher, but also to develop my own individuality and independence. For me, you have been always a model with rounded experiences from whom I learn. Thomas, for believing me and believing in me, for everything you have done for me, Thank you. Karin Landerl, To you, I owe my deepest gratitude for giving me this unique opportunity of being my second supervisor and a collaborator in my favorite part of this work (study 1 and study 2). It was my day when I first discussed my work with you at the ICP, 2008. I thank you for your assistance and guidance in getting this project started on the right foot by inspiring it with your work and needed materials. I do highly appreciate your thorough revisions and input which brought the papers to a great depth. For your encouragement, trust, tolerance of my mistakes and interest in my work, I am not just delighted, but honored to be one of your scholars and future collaborators. Brigitte Rockstroh, I am very grateful that you allocated your time to review my work. Thank you.

Research paper thumbnail of Abnormal Oscillatory Brain Responses in Dyslexic children with Poor Categorical Perception

life science journal, 2015

The condition of dyslexia has been associated with problems in speech perception, particularly in... more The condition of dyslexia has been associated with problems in speech perception, particularly in the processing of speech signals (e.g., phonemes). Speech signals contain information on different time scales. For instance, while rapid spectral changes as formant transitions may occur on time scale (20-40ms), syllabic and prosodic information occur on a time scale of (150-300ms). Therefore, the segmentation of the auditory stream into discrete representations is a prerequisite for speech perception, According to Peoppel (2003); the input speech signal has a neural representation that is bilaterally symmetric at an early representational level; however it is elaborated asymmetrically in the time domain. Consequently, it has suggested that temporal integration in different windows is reflected as oscillatory neuronal activity in different frequency bands. In this study, we are testing if the temporal integration is reflected as oscillatory activity in different frequency bands by mapp...

Research paper thumbnail of Does Enhancing Visual Perception in Mild Intellectually Disabled Children transfer to other skills?

This work examines the effectiveness of two training programs (teacher-assisted versus computer-b... more This work examines the effectiveness of two training programs (teacher-assisted versus computer-based) to enhance the visual perception of mild intellectually disabled children native Arabic children in Egypt. Subjects were randomly assigned to three groups: control group with treatment as usual (n=12), traditional/teacher-assisted training (n=12) and a computerized training (n=12). Groups were matched for socio-demographic variables controlling for age, gender, and the education of parents. The success of the different training procedures was evaluated by Frosting Developmental Test of Visual Perception and its transfer to other skills in the same modality (List of Reading Readiness Skills) and general improvement in cognitive abilities (The Stanford-Binet Test). Both programs significantly improved performances of the experimental groups compared to the control group. Yet, no significant differences were found between the two active training groups, suggesting that a computerized trainings may be an option to assist challenged children, particularly when there are no specialized teachers available for the highly time consuming trainings. These findings are discussed in terms of neurological plasticity as well as recommendations for integrated training programs.

Research paper thumbnail of The development of reading and spelling abilities in the first 3 years of learning Arabic

Reading and Writing, 2010

Research paper thumbnail of An Epidemiological Survey of Specific Reading and Spelling Disabilities in Arabic Speaking Children in Egypt

Literacy Studies, 2014

While the relationship between reading and spelling disabilities has been reported for many Europ... more While the relationship between reading and spelling disabilities has been reported for many European orthographies, very few studies have been conducted on other types of orthographies. The current chapter studies the relationship between reading and spelling deficits in Arabic based on an epidemiological survey of these deficits in Arabic-speaking children in Egypt. We screened a sample of 1106 Arabic-speaking third graders for their reading and spelling abilities. The prevalence rate for combined deficits in reading as well as spelling was high (12.6 %), but very low for isolated deficits in reading (0.9 %) or spelling (1.1 %). Importantly, we observed less dissociation of reading and spelling in vowelized Arabic compared to shallow orthographies such as German. This finding has implications for word processing in Arabic and it highlights the need for further studies of both typical and atypical development of literacy skills in Arabic-speaking children.