Visual Search in Chinese Children With Attention Deficit/Hyperactivity Disorder and Comorbid Developmental Dyslexia: Evidence for Pathogenesis From Eye Movements

The planum temporale is clearly involved in language processing, for it serves as the auditory association cortex. Research has consistently demonstrated that 60 to 70% of the population has leftward asymmetry of the planum temporale. Research has also suggested that dyslexic individuals tend to have either rightward asymmetry or symmetrical plana. Moreover, many studies have found a relationship between the presence of dyslexia and/or language impairment and deficits in the normal right ear advantage found in dichotic listening paradigms. In this context, this study examined the relationship between planum temporale asymmetry and ear preference in dichotic listening performance in children with Developmental Dyslexia and Attention-Deficit/Hyperactivity Disorder (ADHD). Subjects included 19 children with dyslexia (10 of whom had a comorbid diagnosis of ADHD), 23 children with ADHD, and 12 diagnosed normal control children. Dichotic listening data were not collected for 8 of the 12 normal control children and for 3 of the 23 ADHD children. Results revealed no significant difference between ADHD and dyslexic subjects in regard to ear advantage on the free recall dichotic listening task. In addition, although the directed dichotic listening tasks were not related to degree of planum asymmetry, as predicted, results indicated that subjects who consistently displayed an atypical left ear advantage tended to have larger right bank lengths than those who consistently displayed a typical right ear advantage. These findings support the notion that some individuals with dyslexia or language deficits tend to have a larger right planum temporale and that performance on dichotic listening tasks may reflect this relatively unusual pattern. (JINS, 2002, 8, 22–36.)

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Perceptual-visual-motor measures, reading and properties of eye movements of students with attention deficit hyperactivity disorder

EDUCATION SCIENCES AND SOCIETY ◽

10.3280/ess1-2021oa11927 ◽

2021 ◽

pp. 252-270

Author(s):

Simone Aparecida Capellini ◽

Isabela Pires Metzner ◽

Noemi Del Bianco ◽

Ilaria D’Angelo ◽

Aldo Caldarelli ◽

...

Keyword(s):

Attention Deficit Hyperactivity Disorder ◽

Academic Performance ◽

Eye Movements ◽

Attention Deficit ◽

Motor Deficit ◽

Reading Processes ◽

Hyperactivity Disorder ◽

Group I ◽

Visual Motor ◽

Students With Adhd

This study is aimed to compare and relate the performance of students with Attention Deficit Hyperactivity Disorder (ADHD) and with good academic performance in the perceptual-visual-motor and reading processes, and to verify the eye movements' pattern of students with ADHD during reading. Twenty students from primary school, both male and female, and aged between eight and twelve years old, participated in this study. They were divided into two groups: Group I (GI): composed of 20 students with an interdisciplinary diagnosis of ADHD, and Group II (GII): composed of 20 students with an equal good academic performance according to gender, age group and education with GI. All students were submitted to the Reading Processes Assessment protocol (PROLEC), Developmental Test of Visual Perception 3 (DTVP 3). PROLEC text reading test was administered to the students, also through the computer support. During this activity, the Gazepoint GP3 Eye Tracker equipment was used, which records the eye movements and analyses their properties by using the Gazepoint Analysis UX Edition Software for capturing eye movement during reading. These procedures were applied individually with students from both groups. The results were statistically analyzed, and revealed that the difficulties of students with ADHD in the reading processes could be justified by the perceptual-visual-motor deficit, and the shorter fixing time for capturing the information of each word read. This compromises the ability to identify and decode words, leading to difficulty in accessing meaning at the level of words and texts.

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