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Social and Behavioral Sciences Commons™
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Full-Text Articles in Social and Behavioral Sciences
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 …