Attention-Deficit/Hyperactivity Disorder and Academic Functioning: Reading, Writing, and Math Abilities in a Community Sample of Youth with and without ADHD

Contributions of Working Memory, Inhibition, and Processing Speed to Writing Composition in Attention-Deficit/hyperactivity Disorder

Children with Attention-Deficit/Hyperactivity Disorder (ADHD) often struggle with writing composition, possibly due to deficits in executive functions and processing speed. This study examined 518 children with ADHD and 851 controls to assess these effects. Multiple mediation tested whether executive functions (i.e., working memory, inhibition) and processing speed partially mediated the association between inattention and writing composition, controlling for transcription. Results showed inattention negatively predicted writing composition. Executive function accounted for nearly 10%, and processing speed nearly 17%, of the variance in this association. Findings highlight the contributions of executive functions and processing speed to writing difficulties in ADHD.

The Multidimensional Dynamic Feedback Model: A Comprehensive Framework for Understanding and Managing Attention-Deficit/Hyperactivity Disorder

Attention-deficit/hyperactivity disorder (ADHD) is a common neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. These symptoms can significantly impact academic performance, social interactions, and daily activities, often creating cycles that worsen long-term challenges. This review introduces the Multidimensional Dynamic Feedback Model (MDFM), which aids in understanding ADHD's development and guiding intervention strategies. The model emphasizes the dynamic interactions among genetic, environmental, cognitive, and behavioral factors. The MDFM consists of three key aspects: (1) the interplay between genetic and environmental factors in shaping ADHD's biological basis, (2) the role of cognitive and neural processes in driving core symptoms, and (3) the influence of behavioral feedback loops that reinforce negative behaviors and hinder adaptation. The model highlights the importance of personalized interventions and effective feedback systems, including early prevention, supportive family and school environments, and the impact of social and cultural backgrounds on treatment outcomes. As a comprehensive framework, the MDFM offers a holistic perspective for clinicians, aiming to enhance long-term outcomes and promote the health and well-being of individuals with ADHD across the lifespan. By addressing implementation challenges, the model seeks to improve ADHD prevention and management, ultimately supporting individuals and their communities.

The underlying neuropsychological and neural correlates of the impaired Chinese reading skills in children with attention deficit hyperactivity disorder

Impaired basic academic skills (e.g., word recognition) are common in children with Attention Deficit Hyperactivity Disorder (ADHD). The underlying neuropsychological and neural correlates of impaired Chinese reading skills in children with ADHD have not been substantially explored. Three hundred and two children with ADHD (all medication-naïve) and 105 healthy controls underwent the Chinese language skill assessment, and 175 also underwent fMRI scans (84 ADHD and 91 controls). Between-group and mediation analyses were applied to explore the interrelationships of the diagnosis of ADHD, cognitive dysfunction, and impaired reading skills. Five ADHD-related brain functional networks, including the default mode network (DMN) and the dorsal attention network (DAN), were built using predefined regions of interest. Voxel-based group-wise comparisons were performed. The ADHD group performed worse than the control group in word-level reading ability tests, with lower scores in Chinese character recognition (CR) and word chains (WS) (all P < 0.05). With full-scale IQ and sustained attention in the mediation model, the direct effect of ADHD status on the CR score became insignificant (P = 0.066). The underlying neural correlates for the orthographic knowledge (OT) and CR differed between the ADHD and the control group. The ADHD group tended to recruit more DMN regions to maintain their reading performance, while the control group seemed to utilize more DAN regions. Children with ADHD generally presented impaired word-level reading skills, which might be caused by impaired sustained attention and lower IQ. According to the brain functional results, we infer that ADHD children might utilize a different strategy to maintain their orthographic knowledge and character recognition performance.

Clinical characterization of children and adolescents with ADHD and sleep disturbances

Sleep disturbances (SD) are commonly reported concerns among parents and caregivers of children and adolescents with Attention-Deficit/Hyperactivity Disorder (ADHD). While it is widely acknowledged that SD can worsen various aspects of children and adolescents' well-being (e.g., academic performance and emotional/behavioral state), a comprehensive clinical characterization of ADHD and SD is currently lacking. To address this gap, 136 children and adolescents diagnosed with ADHD (aged 6 to 14 years) were retrospectively selected by reviewing electronic health records of hundreds of patients with neuropsychiatric disorders referred to the children's hospital. Participants were divided into two groups based on the presence of SD, assessed via a parent-report questionnaire (94 ADHD without SD and 42 ADHD with SD). Standardized measures of adaptive behavior, academic performance, ADHD-related and emotional/behavioral symptoms were collected. Results documented that the group of ADHD with SD obtained worse scores in specific aspects of adaptive behavior (conceptual and practical domains), academic performance (text comprehension, writing), ADHD symptoms (inattention) and emotional/behavioral difficulties (especially, mood/emotional regulation and stress) compared to those with ADHD without SD. In addition, our results established a relationship between sleep problems and diverse clinical aspects of children and adolescents with ADHD, while controlling for age, cognitive level, gender, ADHD symptoms severity, and Body Mass Index. From a clinical perspective, our study suggests that the presence of SD in patients with ADHD may serve as an indicator for strengths and weaknesses in this population, even demonstrating an independent relationship with specific clinical dimensions. Implications to improve clinical diagnostic and therapeutic interventions are discussed.

Domain Specific and Cross Domain Associations between PASS Cognitive Processes and Academic Achievement

The purpose of this study was to examine the role of intelligence-operationalized in terms of Planning, Attention, Simultaneous, and Successive (PASS) processing skills-in reading and mathematics. Two hundred and forty-two Grade 6 Greek-speaking students (114 boys and 128 girls, Mage = 135.65 months, SD = 4.12 months) were assessed on PASS processes, speed of processing (Visual Matching), reading (Wordchains and CBM-Maze), and mathematics (Mathematics Achievement Test and Mathematics Reasoning Test). The results of the hierarchical regression analyses showed that, after controlling for family's socioeconomic status and speed of processing, Attention and Successive processing predicted reading and Planning and Simultaneous processing predicted mathematics. Taken together, these findings suggest that different PASS processes may account for individual differences in reading and mathematics.