Neuroplasticity Technology for Attention-deficit/Hyperactivity Disorder (ADHD)
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|ClinicalTrials.gov Identifier: NCT03363568|
Recruitment Status : Completed
First Posted : December 6, 2017
Last Update Posted : December 12, 2017
|Condition or disease||Intervention/treatment||Phase|
|Attention Deficit Hyperactivity Disorder||Behavioral: Adaptive Inhibitory Control Training Behavioral: Non-adaptive Inhibitory Control Training||Not Applicable|
Both medication and cognitive behavioral therapy are effective treatments for many children, however, adherence to both medication and therapy regimes is low. Thus, identifying effective adjunct treatments for ADHD is imperative.
Previous studies exploring computerized training programs as supplementary treatments have targeted working memory or attention. However, many lines of research point to inhibitory control (IC) playing a central role in ADHD pathophysiology. IC abnormalities in children with ADHD have been evidenced both in behavioral performance on computerized tasks as well as in the structure and function of neural systems known to support IC function. Furthermore, these IC abnormalities have been linked to symptom severity.
Given findings that the most successful training interventions for children with ADHD are those that have implemented IC training along wtih working memory or attention and previous work demonstrating that IC is a central deficit for children with ADHD, it is surprising that no studies have sought to investigate programs that specifically target IC. Investigators hypothesize that training IC alone will decrease symptoms of ADHD, and information confirming this hypothesis would contribute to making training regimens for children with ADHD efficient by identifying the primary cognitive skill that requires intervention. To test this, they administer a randomized control trial of either adaptive of non-adaptive stop signal reaction time (SSRT) tasks to children with ADHD and assess effects of training on ADHD symptoms and neural activity.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||41 participants|
|Intervention Model:||Parallel Assignment|
|Intervention Model Description:||Children were randomly assigned to adaptive treatment (n=20) or non-adaptive control (n=20) with identical tasks, stimuli, and goals. Children were instructed to train for 5 days a week (25m/day) for 4-weeks. All participants had between 10-20 training sessions at study completion.|
|Masking:||Double (Participant, Investigator)|
|Official Title:||Neuroplasticity Technology for Attention-deficit/Hyperactivity Disorder (ADHD)|
|Actual Study Start Date :||July 18, 2013|
|Actual Primary Completion Date :||March 3, 2014|
|Actual Study Completion Date :||March 3, 2014|
Experimental: Adaptive Inhibitory Control Training
Participants played a set of three modified stop-signal reaction time tasks designed by NeuroScouting, LLC at home for approximately 5 days a week (25 min/day) for 4-weeks. This condition involved real-time adaptive gameplay that increased in difficulty as performance increased.
Behavioral: Adaptive Inhibitory Control Training
Playing computerized stop-signal reaction time tasks that had been modified to increase in difficulty as performance increased.
Active Comparator: Non-Adaptive Inhibitory Control Training
Participants played a set of three modified stop-signal reaction time tasks designed by NeuroScouting, LLC at home for approximately 5 days a week (25 min/day) for 4-weeks. This condition had no change in difficulty (non-adaptive gameplay).
Behavioral: Non-adaptive Inhibitory Control Training
Playing computerized stop-signal reactions time tasks that do not change in difficulty level (non-adaptive).
- Change in Average Parent-Reported Inattention Symptoms [ Time Frame: Baseline and 4-weeks ]Parent-report of inattention symptoms using the Swanson, Nolan, and Pelham Questionnaire (SNAP-IV). The SNAP-IV is based on a 0 to 3 rating scale (Not at All = 0, Just A Little = 1, Quite a Bit = 2, and Very Much = 3). Subscale inattention items are calculated by summing the score for the 9 inattention items and dividing by 9.
- Change in Average Parent-Reported Hyperactivity Symptoms [ Time Frame: Baseline and 4-weeks ]Parent-report of hyperactivity symptoms used the Swanson, Nolan, and Pelham Questionnaire (SNAP-IV). The SNAP-IV is based on a 0 to 3 rating scale (Not at All = 0, Just A Little = 1, Quite a Bit = 2, and Very Much = 3). Subscale hyperactivity items are calculated by summing the score for the 9 hyperactivity items and dividing by 9.
- Change in Relative Theta Power During Resting-State Electroencephalogram(EEG) Recording [ Time Frame: Baseline and 4-weeks ]EEG data was collected for both eyes open and eyes closed resting state for 7 trials of 30 seconds each. For each participant, relative power in the theta band (5-8 Hz) was calculated for two regions of interest analogous to bilateral parietal electrodes in the international 10-10 system using frequency band analyses.
- Change in Teacher Reported Inattention [ Time Frame: Baseline and 4-weeks ]Teachers or other non-parental caretakers (e.g. babysitter) completed the teacher report versions of the Conners. The Conner's is based on a 0 to 3 rating scale with 0 being Not true at all, 1 = Just a little true, 2 = pretty much true, and 3 = Very much true. The teacher-report inattention score was calculated by norming and averaging ratings of the inattention domains in the Conner's Teacher Report.
- Change in Teacher Reported Hyperactivity [ Time Frame: Baseline and 4-weeks ]Teachers or other non-parental caretakers (e.g. babysitter) completed the teacher report versions of the Conners. The Conner's is based on a 0 to 3 rating scale with 0 being Not true at all, 1 = Just a little true, 2 = pretty much true, and 3 = Very much true. The teacher-report hyperactivity score was calculated by norming and averaging ratings of the hyperactivity domains in the Conner's Teacher Report.
- Change in N200 Event-Related Potential (ERP) Component During Inhibition [ Time Frame: Baseline and 4-weeks ]The N200 is a negative going component maximal over frontal scalp cites, which peaks roughly between 200 and 350 ms post stimulus onset. Each subject's ERP response on both errors of commission and correct inhibition trials of a stop-signal reaction time task were analyzed for changes in amplitude and latency.
- Change in NEPSY-II Inhibition Scale Score [ Time Frame: Baseline and 4-weeks ]The Developmental NEuroPSYchological Assessment (NEPSY-II) is a nationally normed neuropsychological test for children ages 3-16 years. The Inhibition scale of the NEPSY includes an 'arrows' subtest (completed at baseline) and a 'shapes' subtest (completed at 4 weeks). Performance on these tests were measured as the number of total errors on each subtest task (Naming, Inhibition, and Switching), such that individuals who make more errors show poorer self-monitoring skills.
- Change in Math Ability on the Woodcock Johnson III [ Time Frame: Baseline and-4 weeks ]Math ability subtests of the Woodcok Johnson (WJ-III) were administered: Match Calculation (at baseline) and Match Fluency (at 4 weeks). Normed age and grade estimates of math ability were used. Outcomes are reported using age-based Z-scores, with a mean of 0 and standard deviation of 1.
- Change in Working Memory Capacity [ Time Frame: Baseline and 4 weeks ]Participants completed a working memory filtering task. This was a delayed match to sample task in which participants saw a visual array of several circles on a 4x4 grid, maintained this array in working memory during a delay, and decide if the color of a single probe matched what they saw during encoding. Changes in accuracy from same load trials in which children held 1 shape versus 2 shapes in working memory were used to assess filtering of task-irrelevant information. Changes in accuracy with load from the 1-shape condition are used to assess working memory capacity.
- Changes in Inhibitory Control Over Rewarding Stimuli [ Time Frame: Baseline and 4 weeks ]This was a two-part modified Go/NoGo task with a training phase and testing phase. Participants completed the monetary incentive delay (MID) task during training. Shapes that had been previously rewarded or previously neutral were used as the no-go stimuli in the Go/NoGo task. Errors of commission to the previously rewarded stimuli controlling for errors of commission to the previously neutral stimuli served as the measure of inhibitory control over rewarding stimuli.
- Changes in Behavior Rating Inventory of Executive Function Global Score [ Time Frame: Baseline and 4 weeks ]The Behavior Rating Inventory of Executive Function (BRIEF) is an assessment of executive function consisting of 86-item questionnaire completed by parents. The Global Score on the BRIEF incorporates all clinical scales of the BRIEF and is reported as a T-score with a mean of 50 and standard deviation of 10.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03363568
|United States, Massachusetts|
|Boston Children's Hospital|
|Boston, Massachusetts, United States, 02115|
|Principal Investigator:||Margaret Sheridan, PhD||University of North Carolina, Chapel Hill|