The term comorbidity is of questionable value in reference to developmental disorders: data and theory

Over the last decade, there has been an enormous increase in the number of studies evaluating the overlap of developmental syndromes or disorders in both children and adults. This overlap of symptoms is often referred to as comorbidity, a term we criticize in this article because of its unsubstantiated presumption of independent etiologies. The premise of this article is that discrete categories do not exist in real life, and that it is misleading to refer to overlapping categories or symptoms as "comorbidities." We illustrate our point by presenting data from 179 school-age children evaluated with rigorous research criteria for seven disorders: reading disability (RD), attention-deficit/hyperactivity disorder (ADHD), developmental coordination disorder (DCD), oppositional defiant disorder (ODD), conduct disorder (CD), depression, and anxiety. Fully 50% of this sample met the criteria for at least two diagnoses. The children with ADHD were at higher risk of having at least a second disorder compared to the children with RD. Overall, the high rates of overlap of these behavioral, emotional, and educational deficits in this broadly ascertained sample support the idea that the concept of comorbidity is inadequate. We discuss the concept of atypical brain development as an explanatory idea to interpret the high rate of overlap of developmental disorders.     

‘Seeing through different eyes’: exploring the value of participative research using images in schools

This article is an exploration of the value of research involving images in a school, and aims to provoke more general discussion of the purpose, value and risks of educational research using images. It reports on a participative research project in a secondary school which led to the construction of a web site based on images of that school. The value of the process and of the web site in promoting learning within the school community is discussed and assessed, along with the risks of abuse, misuse, and manipulation of those images. The authors consider the value of grouping and clustering the images generated in this project as a means of engaging meaningfully with the images themselves, their context and what they represent. Data are presented from discussions with students and staff involved in taking images, with further reflection on the process that they and we engaged in.     

A Comparison of the Performance of Simulated Hierarchical and Linear Testlets

A series of computer simulations were run to measure the relationship between testlet validity and the factors of item pool size and testlet length for both adaptive and linearly constructed testlets. We confirmed the generality of earlier empirical findings (Wainer, Lewis, Kaplan, & Braswell, 1991) that making a testlet adaptive yields only modest increases in aggregate validity because of the peakedness of the typical proficiency distribution.     

Motor correlates of ADHD: contribution of reading disability and oppositional defiant disorder

This study investigated whether the likelihood of motor impairment in children with attention-deficit/hyperactivity disorder (ADHD) increases with the presence of other disorders, and whether the co-occurring diagnoses of reading disability (RD) and oppositional defiant disorder (ODD) account for the motor deficits seen in ADHD. A total of 291 children (218 boys, 73 girls) participated. Six groups of children were compared: ADHD only (n = 29); RD only (n = 63); ADHD and RD (n = 47); ADHD and ODD (n = 19); ADHD, RD, and ODD (n = 21); and typically developing control children (n = 112). Motor skills were assessed with the Bruininks-Oseretsky Test of Motor Proficiency and the Beery Test of Visual-Motor Integration. We found that the motor skills of the ADHD-only group did not differ from the typical control group. Furthermore, motor impairment in ADHD increased as a function of co-occurring disorders, and the presence of RD rather than ADHD predicted motor impairment.     

An investigation of blended learning to support reading instruction in elementary schools

Educational technology research and development - Research is needed to address the possible benefits of blended learning as a form of reading instruction in elementary schools. Blended learning...     

Three-Year Longitudinal Study: Impact of a Blended Learning Program—Lexia® Core5® Reading—on Reading Gains in Low-SES Kindergarteners

This three-year longitudinal study tracked the reading performance of 68 kindergarten students from low SES backgrounds. These students received instruction with a blended learning program ——Lexia® Core5® Reading—from the start of kindergarten through second grade. During each school year the students made significant gains on a standardized reading test. However, performance on the test declined significantly from the spring of one school year to the fall of the next, indicative of a substantial summer slide. Yet, further comparisons revealed that performance from the fall of one school year to the fall of the next showed significant improvement, pointing to the benefits of school-based instruction to help overcome the summer slide. More than 90% of low performers who started kindergarten scoring below average on the standardized test finished second grade scoring average or better. Benefits of Lexia Core5® Reading to support reading growth in elementary school students from low SES backgrounds are discussed.     

Performance of children with developmental dyslexia on high and low topological entropy artificial grammar learning task

Graph complexity as measured by topological entropy has been previously shown to affect performance on artificial grammar learning tasks among typically developing children. The aim of this study was to examine the effect of graph complexity on implicit sequential learning among children with developmental dyslexia. Our goal was to determine whether children’s performance depends on the complexity level of the grammar system learned. We conducted two artificial grammar learning experiments that compared performance of children with developmental dyslexia with that of age- and reading level-matched controls. Experiment 1 was a high topological entropy artificial grammar learning task that aimed to establish implicit learning phenomena in children with developmental dyslexia using previously published experimental conditions. Experiment 2 is a lower topological entropy variant of that task. Results indicated that given a high topological entropy grammar system, children with developmental dyslexia who were similar to the reading age-matched control group had substantial difficulty in performing the task as compared to typically developing children, who exhibited intact implicit learning of the grammar. On the other hand, when tested on a lower topological entropy grammar system, all groups performed above chance level, indicating that children with developmental dyslexia were able to identify rules from a given grammar system. The results reinforced the significance of graph complexity when experimenting with artificial grammar learning tasks, particularly with dyslexic participants.     

SAT Differential Item Performance for Nine Handicapped Groups

The purpose of this study was to identify broad classes of items that behave differentially for handicapped examinees taking special, extended-time administrations of the Scholastic Aptitude Test (SA T). To identify these item classes, the performance of nine handicapped groups and one nonhandicapped group on each of two forms of the SAT was investigated through a two-stage procedure. The first stage centered on the performance of item clusters. Individual items composing clusters showing questionable performance were then examined. This two-stage procedure revealed little indication of differentially functioning item classes. However, some notable instances of differential performance at the item level were detected, the most serious of which affected visually impaired students taking the braille edition of the test.     

Profiles of change in motivation for teaching in higher education at an American research university

The current study employed an emergent theoretical model of teaching role identity and motivation to investigate the change in conception of and motivation for teaching in higher education of research graduate students who teach in the United States. Fifteen participants took a graduate-level seminar as part of a two-course teaching professional development (PD) program. Qualitative content analysis of the participants’ pre-seminar and post-seminar reflective essays focused on change in the theoretical model’s components – participants’ goals, self-perceptions, epistemological beliefs, and action possibilities – and their alignment. The findings suggested four kinds of change in each component, ranging from dramatic change to reversed change, as well as three general profiles of change labeled ‘Transformation,’ ‘Elaboration’, and ‘Stagnation’. The model proved useful in conceptualizing the change in participants’ teaching-related conceptions and motivation and could provide a guide for future research on teaching motivation and for designing and evaluating teaching PD in higher education.     

Types of Homeschool Environments and Need Support for Children’s Achievement Motivation

ABSTRACT

Working within a self-determination theory (SDT) framework, this study used cluster analysis to examine the naturally occurring types of homeschool-learning environments parents (N = 457) have created. Measures of support for student autonomy, mastery goal structure, and use of conditional regard were adapted for a homeschool context and used as constituting variables. Follow-up measures of parental need satisfaction, efficacy, student academic engagement, teaching practices, and demographics were used to identify significant differences among homeschooling motivational profiles. A five-cluster solution best fit the data: a high need support profile, low need support profile and three profiles of mixed need support. In general, the high need and mixed need support profiles were associated with higher student engagement, need satisfaction, efficacy for homeschooling, and frequent use of teaching strategies that promote autonomous motivation and support for student competence. The low need support profile was significantly associated with lower need satisfaction and teaching strategies associated with control. Higher levels of academic engagement were reported for those students homeschooled longer and at higher grade levels. Male teaching parents (N = 29) reported significantly less need satisfaction and were significantly more represented in the low need support profile. These findings point to the utility of self-determination theory for characterizing the motivational environments of homeschools.