Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by levels of inattention or hyperactivity and impulsivity that are developmentally inappropriate. ADHD affects approximately 3–12% of children, with more boys being diagnosed than girls. The Diagnostic and Statistical Manual of Mental Disorders classifies ADHD as (1) combined inattention and hyperactivity/impulsivity; (2) predominantly inattention; and (3) predominantly hyperactivity/impulsivity. Conversely, the International Classification of Diseases requires the presence of inattention, hyperactivity, and impulsivity for a diagnosis of hyperkinetic disorder, the European label for ADHD. ADHD is a complex disorder that requires a rigorous diagnostic process that typically begins with a detailed family, developmental, medical, psychiatric, academic, and behavioral history. The next step involves a variety of assessments in areas including but not limited to neurological, intellectual, academic achievement, memory, attention, concentration, executive functioning, response inhibition, and behavior. One of the challenges in diagnosing ADHD is ruling out the nature of any comorbid conditions and ascertaining the primary condition should more than one secondary condition be identified. A variety of treatment and intervention approaches exist for children and youth with ADHD. The most common and most evidence-based approaches include the use of cognitive behavioral interventions, psychostimulant medication, or a combination of the two. In addition, a variety of instructional strategies have been found to be effective, particularly when combined with self-regulatory strategies, executive control, and active learner participation with a teacher or adult mediator. There is continuing debate as to whether learners with ADHD are better served in general classrooms or in more specialized settings. However, the solution is not to use one approach instead of the other. An effective program should meet the needs of learners using the appropriate combination of specialized supports and general classroom practices. Implementing such programs can place a lot of demand on individual teachers. The Universal Design for Learning (UDL) approach is designed to support teachers in responding to diverse learning needs and to focus on the limitations of the classroom environment rather than on the limitations of the learner has been developed and is demonstrating promise. UDL incorporates differentiated instruction to focus on curricular design techniques that emphasize setting motivational factors pertinent to learning, finding alternative and interesting ways to represent the material to be learned, and enabling alternative ways for learners to express their knowledge. Combined with creating safe and supportive classrooms for all learners, UDL affords a more planful approach, so responding to learning differences is not seen as an add-on but as an integral component of the teaching/learning process that combines various tiers of instruction aimed at meeting a wider range of learner strengths and needs.
Frederick French and Carmel French
Rosalyn H. Shute
Mindfulness, adapted from ancient Buddhist thought and practice, was introduced into the West in a secularized and Westernized form during the 1980s. In subsequent decades, it spread around the world, into clinics, workplaces, and schools. The practice involves cultivating the ability to focus attention, and to notice any distracting thoughts and feelings without judgment or elaboration, in order to reduce stress and improve mental health. As such, it is a psychological phenomenon involving metacognition, or thinking about thinking, though this can be placed within a holistic framework that sees the mind as intricately linked with the body and the external world. In the early years of the 21st century, concerns grew about children’s mental health, and schools became seen as places to address this through universal programs; that is, mental health promotion programs that reach all students and that therefore do not stigmatize those who already have psychological difficulties, or are at risk of developing them. Evidence was also accruing that, with samples of healthy (non-clinical) adults, mindfulness had moderate effects on measures such as anxiety, and strong effects in reducing stress. Although research designs were generally not very strong, the positive results and public enthusiasm for mindfulness encouraged the introduction of universal programs into schools, and even preschools. However, the dissemination of school-based mindfulness programs ran well ahead of the scientific evidence examining their efficacy (under tightly controlled conditions) or their effectiveness in real-world school contexts. While studies were suggestive that mindfulness could affect many aspects of children’s and adolescents’ wellbeing and development, the body of research as a whole fell short in terms of scientific rigor. There were few well-designed randomized controlled trials that would enable firm conclusions to be drawn that any identified effects were due to the mindfulness program rather than to unknown factors. Moreover, little attention was paid to the presumed mechanisms of change or to the developmental appropriateness of programs. As more, and better-designed, studies began to emerge, accumulating results suggested that effects were generally small, but stronger for older than younger adolescents, and longer lasting for adolescents than for children. Issues that remained for further systematic attention included many matters of program design and implementation, the safety of the practice, its basis in developmental theory and research, and its ethical and political implications.
Stoo Sepp, Steven J. Howard, Sharon Tindall-Ford, Shirley Agostinho, and Fred Paas
In 1956, Miller first reported on a capacity limitation in the amount of information the human brain can process, which was thought to be seven plus or minus two items. The system of memory used to process information for immediate use was coined “working memory” by Miller, Galanter, and Pribram in 1960. In 1968, Atkinson and Shiffrin proposed their multistore model of memory, which theorized that the memory system was separated into short-term memory, long-term memory, and the sensory register, the latter of which temporarily holds and forwards information from sensory inputs to short term-memory for processing. Baddeley and Hitch built upon the concept of multiple stores, leading to the development of the multicomponent model of working memory in 1974, which described two stores devoted to the processing of visuospatial and auditory information, both coordinated by a central executive system. Later, Cowan’s theorizing focused on attentional factors in the effortful and effortless activation and maintenance of information in working memory. In 1988, Cowan published his model—the scope and control of attention model. In contrast, since the early 2000s Engle has investigated working memory capacity through the lens of his individual differences model, which does not seek to quantify capacity in the same way as Miller or Cowan. Instead, this model describes working memory capacity as the interplay between primary memory (working memory), the control of attention, and secondary memory (long-term memory). This affords the opportunity to focus on individual differences in working memory capacity and extend theorizing beyond storage to the manipulation of complex information. These models and advancements have made significant contributions to understandings of learning and cognition, informing educational research and practice in particular. Emerging areas of inquiry include investigating use of gestures to support working memory processing, leveraging working memory measures as a means to target instructional strategies for individual learners, and working memory training. Given that working memory is still debated, and not yet fully understood, researchers continue to investigate its nature, its role in learning and development, and its implications for educational curricula, pedagogy, and practice.
Daniel P. Hallahan, Paige C. Pullen, James M. Kauffman, and Jeanmarie Badar
Exceptional learners is the term used in the United States to refer to students with disabilities (as well as those who are gifted and talented). The majority of students with disabilities have cognitive and/or behavioral disabilities, that is, specific learning disability (SLD), intellectual disability (ID), emotional disturbance, (ED), attention deficit hyperactivity disorder (ADHD), autism spectrum disorders (ASD). The remaining have primarily sensory and/or physical disabilities (e.g., blindness, deafness, traumatic brain injury, cerebral palsy, muscular dystrophy). Many of the key research and policy issues pertaining to exceptional learners involve their definitions and identification. For example, prior to SLD being formally recognized by the U.S. Department of Education in the 1970s, its prevalence was estimated at approximately 2% to 3% of the school-age population. However, the prevalence of students identified for special education as SLD grew rapidly until by 1999 it reached 5.68% for ages 6 to 17 years. Since then, the numbers identified as SLD has declined slowly but steadily. One probable explanation for the decrease is that response to intervention has largely replaced IQ-achievement as the method of choice for identifying SLD. The term intellectual disability has largely replaced the classification of mental retardation. This change originated in the early 2000s because of the unfortunate growing popularity of using retard as a pejorative. Although ID used to be determined by a low IQ-test score, one must also have low adaptive behavior (such as daily living skills) to be diagnosed as ID. That is the likely reason why the prevalence of students with ID at under 1% is well below the estimated prevalence of 2.27% based solely on IQ scores two standard deviations (i.e., 70) below the norm of 100. There are two behavioral dimensions of ED: externalizing (including conduct disorder) and internalizing (anxiety and withdrawal) behaviors. Research evidence indicates that students with ED are underserved in public schools. Researchers have now confirmed ADHD as a bona fide neurologically based disability. The American Psychiatric Association recognizes three types of ADHD: (a) ADHD, Predominantly Inattentive Type; (b) ADHD, Predominantly Hyperactive-Impulsive Type; and (c) ADHD, Combined Type. The American Psychiatric Association recognizes two types of ASD: social communication impairment and repetitive/restricted behaviors. The prevalence of ASD diagnosis has increased dramatically. Researchers point to three probable reasons for this increase: a greater awareness of ASD by the public and professionals; a more liberal set of criteria for diagnosing ASD, especially as it pertains to those who are higher functioning; and “diagnostic substitution”—persons being identified as having ASD who previously would have been diagnosed as mentally retarded or intellectually disabled. Instruction for exceptional children, referred to as “special education,” differs from what most (typical or average) children require. Research indicates that effective instruction for students with disabilities is individualized, explicit, systematic, and intensive. It differs with respect to size of group taught and amount of corrective feedback and reinforcement used. Also, from the student’s viewpoint, it is more predictable. In addition, each of these elements is on a continuum.