Differences in ADHD Questionnaire Completion Rates Versus Academic Focus: University of Rochester Research Offers Support for Neuroscience.
Researchers using a longitudinal design from the ABCD Study identified an association between reward anticipation caudate nucleus activation and gaming addiction symptom scores, but go on to note the don’t imply causality.
San Francisco, 27 September 2026 — The persistence of the occurrence where teenagers play video games away hours but cannot focus adequately in school work has for a long time been explained by individual variation in self-regulatory abilities. A longitudinal study analyzing data from the NIH’s Adolescent Brain Cognitive Development (ABCD) Study offers neuroscience-based information to this thing. But, the researchers make it clear that the study measured signs of gaming addiction, not a clinical diagnosis, and should not be used as an explanation for differences in school focus.
This study (published in the Journal of Behavioral Addictions) was led by first author Daniel A. Lopez and corresponding author John J. Foxe of the Del Monte Institute for Neuroscience at the University of Rochester. The team examined three years’ worth of follow-up data on 6,143 adolescents ranging in age from 10-15 (resulting in 12,745 observations). Alcohol gaming addiction symptoms were evaluated with the Video Game Addiction Questionnaire (VGAQ), and reward processing was evaluated based on fMRI scans administered to participants during the Monetary Incentive Delay task. They found that those with less activation in bilateral caudate nucleus during anticipation of reward scored much higher on the VGAQ (β = −0.87; 95% [− 1.68, − 0.07]); that is, each higher unit of observed activity in the caudate translated to 0.87 lower points scored in the gaming addiction measure. They did not find an association between activity during reward feedback and the VGAQ score.
Make sure to note that this study did not use a diagnosis of gaming addiction, per se. Instead, the study used self-report measures to identify “symptoms of gaming addiction” (using the VGAQ, which consists of six yes/no questions), and a patient’s “score” of symptoms (between 0 and 30 points). The score obtained from the VGAQ is a range, not a set number. Also, the study did not use a clinical cutoff (recommendation: 6–11 points) to identify problem gaming. Because of this, a “higher VGAQ score” is not equivalent to a diagnosis of Gaming Disorder. In the early 2000s the World Health Organization listed Gaming Disorder in the ICD-11 with a meta-analyses estimate of the disorder among children and adolescents being 3.05%–4.6%. These figures are not equivalent one is a symptom count, the other is the number of people who meet the diagnostic criteria.
While this research gives an initial observational insight into the neural processes that may be involved in what is experienced as a game, it does not offer a causal structure for why teenagers experience no problem in playing for hours on end but are unable to maintain similar focus when it comes to school work. The University of Rochester study was a longitudinal observational study and found a correlation though not an actual causal link between levels of caudate nucleus activation and future symptom score. Extending this correlation into the realm of school work or work-related effort is a reasonable hypothesis that has yet to be directly validated.
The gaming industry—characterized by economic systems built around virtual items such as WoW Forever Gold—is currently booming. Hyderabad-based Liquidnitro Games announced the completion of a $19.1 million Series A funding round, co-led by Northpoint Capital and Nexus Venture Partners. Sandeep Kowdley, founder and CEO of the developer—which provides AI-driven game production and live operations services—stated: “With over a decade of experience managing world-class game franchises, a steadfast commitment to our proprietary AI platform, and the financial strength to co-invest with publishing partners, we offer a unique and compelling value proposition to publishers operating in an increasingly complex industry landscape.” Liquidnitro employs a “live operations” model, which maintains high player engagement post-launch through continuous adjustments to game mechanics, progression systems, and content delivery. Assessing the specific efficacy of this model and its actual impact on player engagement and retention requires analysis based on independent industry data, rather than inferences drawn solely from a neuroscience study conducted by the University of Rochester. In one of the early experiments exploring the link between video games and the brain’s reward circuitry, a team led by Dr. Allan Reiss at Stanford University used functional magnetic resonance imaging (fMRI) to observe the brain activity of 22 young adults (11 men and 11 women) while they played video games; the findings were published in the *Journal of Psychiatric Research* in 2008. Researchers found that the “mesocorticolimbic system” was activated in subjects during gameplay, with male subjects exhibiting significantly higher levels of reward pathway activation than female subjects. Given the small sample size and the relative simplicity of the gaming tasks, the study’s results merely reveal a general trend—that video games can activate reward circuitry—without providing evidence that can be directly generalized or applied to modern games and game design.
Professionals experienced in educational technology and the design of virtual game products are often capable of creating designs that appeal to commercial platforms like MMOEXP. Research from the University of Rochester has offered a forward-looking insight: could individual differences in neural reward processing mechanisms explain the varying levels of engagement people show across different types of tasks? However, while some argue that game mechanics can be reduced to the principle that “the more immediate the feedback, the higher the engagement,” this hypothesis remains to be proven. As Foxe noted, “These data are beginning to provide us with some clues. For parents of children and adolescents, a primary concern is ‘how much is too much’—that is, how to define reasonable limits for screen time or gaming duration.”
About the University of Rochester ABCD Study Team.
The University of Rochester belongs to 21 data collection sites for the ABCD Study, a publication sponsored by the National Institutes of Health (NIH). The ABCD Study studies the track of brain, socio-emotional, and cognitive development among 11,878 children from pre-adolescence to maturity. The Del Monte Institute for Neuroscience is the University of Rochester’s main center for neuroscience research.
