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Adhd And Working Memory: The Impact Of Central Executive Deficits And Overwhelming Storage/Rehearsal Capacity On Observed Inattentive Behavior, Michael Kofler
Adhd And Working Memory: The Impact Of Central Executive Deficits And Overwhelming Storage/Rehearsal Capacity On Observed Inattentive Behavior, Michael Kofler
Electronic Theses and Dissertations
Inattentive behavior is considered a core and pervasive feature of ADHD; however, an alternative model challenges this premise and hypothesizes a functional relationship between working memory and inattentive behavior. The current study investigated whether inattentive behavior in children with ADHD is functionally related to domain-general central executive and/or subsidiary storage/rehearsal components of working memory. Objective observations of children's attentive behavior by independent observers were conducted while children with ADHD (n=15) and typically developing children (n=14) completed 10 counterbalanced tasks that differentially manipulated central executive, phonological storage/rehearsal, and visuospatial storage/rehearsal demands. Results of latent variable and effect size confidence interval analyses …
Hyperactivity In Boys With Attention-Deficit/Hyperactivity Disorder: A Ubiquitous Core Symptom Or Manifestation Of Working Memor, Jennifer Bolden
Hyperactivity In Boys With Attention-Deficit/Hyperactivity Disorder: A Ubiquitous Core Symptom Or Manifestation Of Working Memor, Jennifer Bolden
Electronic Theses and Dissertations
Hyperactivity is currently considered a core and ubiquitous feature of attention-deficit/hyperactivity disorder (ADHD); however, an alternative model challenges this premise and hypothesizes a functional relationship between working memory (WM) and activity level. The current study investigated whether children s activity level is functionally related to WM demands associated with the domain-general central executive and subsidiary storage/rehearsal components using tasks based on Baddeley s (2007) WM model. Activity level was objectively measured 16 times per second using wrist- and ankle-worn actigraphs while 23 boys between 8 and 12 years of age completed control tasks and visuospatial/phonological WM tasks of increasing memory …
Adhd And Stop-Signal Behavioral Inhibition: Is Mean Reaction Time Contaminated By Exposure To Intermittent Stop-Signals?, Robert Alderson
Adhd And Stop-Signal Behavioral Inhibition: Is Mean Reaction Time Contaminated By Exposure To Intermittent Stop-Signals?, Robert Alderson
Electronic Theses and Dissertations
The current study investigates two recently identified threats to the construct validity of behavioral inhibition as a core deficit of attention-deficit/hyperactivity disorder (ADHD) based on the Stop-signal task: calculation of mean reaction time from go-trials presented adjacent to intermittent stop-trials, and non-reporting of the stop-signal delay metric. Children with ADHD (n=12) and typically developing children (TD) (n=11) were administered the standard stop-signal task and three variant stop-signal conditions. These included a No-Tone condition administered without the presentation of an auditory tone; an Ignore-Tone condition that presented a neutral (i.e., not associated with stopping) auditory tone; and a second Ignore-Tone condition …
Classroom Observation Of Children With Adhd And Their Peers: A Meta-Analytic Review, Michael Kofler
Classroom Observation Of Children With Adhd And Their Peers: A Meta-Analytic Review, Michael Kofler
Electronic Theses and Dissertations
Meta-analysis of 23 between-group direct observation studies of children with ADHD and typically developing peers indicates significant deficiencies in children with ADHD's ability to pay attention in classroom settings. Comparison with 59 single case design studies of children with ADHD suggests generalizability of between-group comparisons. Weighted regression analysis determined that several methodological differences sample characteristics, diagnostic procedures, and observational coding schema have significant effects on observed levels of attentive behavior in the classroom. Best case estimation indicates that after accounting for these factors, children with ADHD are on-task approximately 65% of the time compared to 85% for their …