Doug Hyun Han

Chung-Ang University · Department of Psychiatry

Objective: Language learning through computer games has been suggested to enhance language abilities compared with traditional learning methods. Training in language skills may also improve self-control and reduce problematic behaviors in children and adolescents. We hypothesized that computer game-based language training could be more effective th...

BACKGROUND Adolescence is the period with the highest incidence of mental disorders, half of which begin before age 18. Mental health issues during this stage of life can have extended effects into adulthood, highlighting the need for proactive interventions. Advances in technology have introduced digital phenotypes as a way to diagnose and treatme...

Non-suicidal self-injury (NSSI) among adolescents continues to be a significant public health concern worldwide. A recent systematic review and meta-analysis found that the global prevalence of NSSI in adolescents aged 12–18 years was 17.2%, with higher rates reported among females (19.7%) than males (14.8%). This behavior has been linked to severa...

Introduction Early prediction and timely intervention are particularly essential for high-risk preterm infants. Brain magnetic resonance imaging (BMRI) is frequently used alongside functional evaluations to improve predictions of developmental outcomes. This study aimed to assess voxel-based brain volumetry in extremely preterm infants using BMRI a...

Aims The purpose of this study was investigating the differences in temperament, personality, and cognitive function among athletes and non-athletes, as well as differences within athlete groups participating in different-paced sports like baseball and basketball. Methods A total of 57 professional basketball players, 51 professional baseball play...

BACKGROUND Numerous mobile apps have been developed and applied to patients with cancer. However, a comprehensive app targeted at breast cancer patients that integrates evidence-based medical information, psychological support, and schedule management using multidisciplinary medical approaches remains absent. OBJECTIVE To investigate whether a mob...

BACKGROUND Self-recording is an effective behavior change technology which has long been used in diverse health contexts. Recent technological advancements have broadened its applications. While previous studies have explored its role and benefits in enhancing self-awareness and informed decision-making, relatively little attention has been given t...

BACKGROUND The growing concern on adolescent mental health calls for proactive early detection and intervention strategies. There is a recognition of the link between digital phenotypes and mental health, drawing attention to their potential utility. However, the process of collecting digital phenotype data presents challenges despite its promising...

Background Depression and anxiety are prevalent mental health concerns among children and adolescents. The application of conventional assessment methods, such as survey questionnaires to children, may lead to self-reporting issues. Digital biomarkers provide extensive data, reducing bias in mental health self-reporting, and significantly influence...

Objective Problematic internet gaming by adolescents has been thought to be associated with low self-esteem, depression, anxiety, and attention problems. We hypothesized that both game literacy and coding education would effectively improve problematic internet use. However, game coding education would be more effective in enhancing self-esteem and...

Objective The aim of this study was to increase the treatment rate of perimenopausal women by providing evidence-based nonpharmaceutical treatments through developing scientific evidence-based sports therapy and verifying its effectiveness. Methods In a cross-over design, a total of 33 women were assigned to two different sequences of intervention...

Background Nonsuicidal self-injury (NSSI) combined with suicide ideation increases the risk of suicidal behaviors. Depression and posttraumatic stress disorder (PTSD) are comorbidities of NSSI compounding this relationship. The present study compared diagnostic subgroups of NSSI based on current depression and PTSD on psychological correlates (i.e....

Introduction Attention-deficit/hyperactivity disorder (ADHD) affects a significant proportion of the pediatric population, making early detection crucial for effective intervention. Eye movements are controlled by brain regions associated with neuropsychological functions, such as selective attention, response inhibition, and working memory, and th...

Background Securing a professional baseball career is a formidable task, and only a unique few can overcome the obstacles necessary to become a Major League player in the Korea Baseball Organization (KBO). When achieving a spot in a KBO Major League team, a player’s technical aspect may be influenced by their initial neuropsychological status. Hyp...

Introduction This paper aims to identify and compare changes in trends and research interests in soccer articles from before and during the COVID-19 pandemic. Methods We compared research interests and trends in soccer-related journal articles published before COVID-19 (2018–2020) and during the COVID-19 pandemic (2021–2022) using Bidirectional En...

BACKGROUND Numerous mobile apps have been developed and applied in cancer patients, yet a comprehensive app that integrates evidence-based medical information, psychological support, and schedule management for breast cancer patients using multidisciplinary medical approaches remains lacking. OBJECTIVE To investigate whether a mobile app designed...

Objectives This study aimed to identify the psychiatric comorbidity status of adult patients diagnosed with attention-deficit hyperactivity disorder (ADHD) and determine the impact of comorbidities on neuropsychological outcomes in ADHD. Methods The study participants were 124 adult patients with ADHD. Clinical psychiatric assessments were perform...

Objective Side effects from the coronavirus disease-2019 (COVID-19) vaccine, such as pain, headache, nausea, and fatigue, have caused vaccine hesitancy. Research on the effects of psychological factors on COVID-19 vaccine side effects is insufficient. This study aims to investigate the effect of psychological factors on COVID-19 vaccination side ef...

This study identifies the topical areas of research that have attempted a psychological approach to soccer research over the last 33 years (1990–2022) and explored the growth and stagnation of the topic as well as research contributions to soccer development. Data were obtained from 1863 papers from the Web of Science database. The data were collec...

Objective: Women experience many physical and psychological changes with the reduction of progesterone and estrogen as ovarian function gradually weakens. This study applied a music psychotherapy program as a nonpharmacological treatment method in addition to treatment using drugs such as hormone therapy for perimenopausal women. Method: This st...

BACKGROUND Panic disorder is a common and important disease in clinical practice. It causes a reduction in individual productivity and an increase in health care use. It can be treated with several medications and cognitive behavioral therapy. However, because of adverse medication effects and poor treatment compliance, new therapeutic modules will...

Background Panic disorder is a common and important disease in clinical practice that decreases individual productivity and increases health care use. Treatments comprise medication and cognitive behavioral therapy. However, adverse medication effects and poor treatment compliance mean new therapeutic models are needed. Objective We hypothesized t...

This study aims to identify the knowledge structure and research trends of soccer psychology research during the last 33 years (1990–2022). Data were obtained from 1,863 papers from the Web of Science database. The data were collected through keyword text mining and data preprocessing to determine the keywords needed for analysis. Based on the keyw...

Objectives: Menopause presents various physical and psychological disturbances for women and comes at a high financial cost. Therefore, this study aimed to identify factors influencing menopause symptoms. Study design: Data of Korean perimenopausal women aged 40-60 (n = 1060; mean age, 46.03 ± 4.08) were collected by a research company. Particip...

Background Positive and negative parenting styles as well as psychiatric comorbidities including attention deficit hyperactivity disorder (ADHD) have been associated with internet gaming disorder (IGD) in children and adolescents. We hypothesized that ADHD and parenting style would be associated with IGD in adolescents. In addition, psychological s...

Background: Music is regarded as a beneficial tool for assessing the clinical symptoms and communication skills in individuals with autism spectrum disorder (ASD) or autism. The present study developed a music-based attention test (MAT) for individuals with autism using music parameters and the algorithm of the comprehensive attention test (CAT)....

Objective: Problematic internet gaming in adolescents is associated with various negative outcomes, such as low self-esteem, depression, anxiety, and attention problems. We hypothesized that game coding education, by improving adolescents' self-esteem, would be more effective than game literacy education in mitigating problematic internet gaming....

Objective: Individuals with internet gaming disorder (IGD) or gaming disorder (GD) had a higher prevalence of ADHD than individuals without IGD or GD. The overpathologizing of excessive gaming behaviors may be associated with the functional impairment due to ADHD in individuals with GD. Methods: The present study was designed to compare the gami...

Objective Most affective neuroscience studies use pictures from the International Affective Picture System or standard facial expressions to elicit emotional experiences. The attention system, including the prefrontal cortex, can mediate emotional regulation in response to stimulation with emotional faces. We hypothesized that emotional experience...

Background: Vaccine hesitancy can prevent full immunization against coronavirus infectious disease-19 (COVID-19). We hypothesized that multiple factors, including an individual's personality and psychological factors, are associated with vaccine hesitancy. Methods: A total of 275 non-vaccinated individuals were recruited for this study. Particip...

Early prediction and timely intervention are particularly essential for high-risk preterm infants. Brain magnetic resonance imaging (bMRI) is frequently used alongside functional evaluations to improve predictions of developmental outcomes. This study aimed to assess voxel-based brain volumetry in extremely preterm infants using bMRI at term equiva...

Objective: With the elements of competition and reward, digital game-based learning is reportedly more effective than traditional instruction methods. Moreover, children with attention problems are reportedly often interested in internet games. We hypothesized that digital game-based learning can improve the effectiveness of educational opportuniti...

Attention-deficit/hyperactivity disorder (ADHD) is a childhood-onset disorder characterized by pharmacological and non-pharmacological interventions. Despite the available treatment options and prevention measures, conventional treatments have several limitations. Digital therapeutics (DTx) like EndeavorRx® is an emerging alternative to overcome th...

Background: Emotion recognition is essential to the social adjustment and social interaction of people with intellectual and developmental disabilities (IDDs). Given that music is a medium for expressing and conveying human emotion, we conducted this preliminary study to identify musical passages representing the basic human emotions of happiness,...

Objective: Aerobic exercise may be associated with changes in brain activity within the default mode network (DMN) and dorsal attention network (DAN). We hypothesized that changes in functional connectivity (FC) within the DMN and DAN might be most effectively activated by moderate-intensity exercise. Methods: Resting-state functional magnetic r...

Aim: The high comorbidity rates of internet gaming disorder (IGD) and gaming disorder (GD) with other psychiatric disorders are concerning. A follow-up study of gamers from clinical and non-clinical samples with and without diagnoses of IGD or GD was conducted to investigate the changes in diagnoses over a one-year period, compare their diagnostic...

Background Various comorbid psychiatric diagnoses, including attention deficit hyperactivity disorder (ADHD), have been reported in individuals with internet gaming disorder (IGD). Prior research has shown alterations in brain metabolites, including N-acetylaspartate (NAA), and combined glutamate and glutamine in patients with ADHD that were simila...

The Wii Fit (Nintendo, Kyoto, Japan) is the most commonly used exergame platform for balance training. We explored diverse factors associated intention of sustainable use of either the Wii Fit or smartphone-based fitness applications. Then, we analyzed differences in such factors between users of the Wii Fit and those of smartphone-based fitness ap...

Introduction The COVID-19 pandemic could generate a turning point for introducing a new system for sports participation and business. The purpose of this study is to explore trends and topic structures of COVID-19-related sports research by analyzing the relevant literature. Methods Sports studies related to COVID-19 were collected in searching in...

Objective: Establishing positive network resources and rebuilding drug free networks are key components of recovery process for women with substance use disorder (SUDs). Theory of planned behavior (TPB) posits that behaviors are determined by behavioral intentions, which are determined by three factors: attitude toward the behavior, perceived beha...

Background: Somatic symptoms, which are common in major depressive disorder (MDD), are associated with a worse prognosis and increased health costs. Aims: This randomized, double-blind, placebo-controlled study evaluated the efficacy of aripiprazole augmentation in MDD patients with somatic symptoms. Methods: In all, 41 MDD patients with somat...

Attention-deficit/hyperactivity disorder (ADHD) is a common developmental disorder of the brain with the essential features of a persistent pattern of age-inappropriate inattention and/or hyperactivity–impulsivity. The symptom-based diagnosis of ADHD in elite athletes is not different from that of ADHD in the general population. However, athletes’...

Introduction: Side effects from the COVID-19 vaccine, such as pain, chills, headache, nausea, and fatigue, have caused vaccine hesitancy. Research on the effects of psychological factors on COVID-19 vaccine side effects is insufficient. This study aims to investigate the effects of psychological factors on COVID-19 vaccination side effects. Materia...

Background and Objectives Fewer studies are available on geriatric patients’ gustatory dysfunction than on their olfactory dysfunction. Here we aimed to evaluate the relationship between subjective gustatory dysfunction and subjective or objective olfactory dysfunction according to cognitive function in geriatric patients.Subjects and Method We pro...

This case report aimed to discuss the efficacy of aripiprazole for dyskinesia in patients with functional movement disorder after streptococcal infection, with its biological action of modulating dopamine hyperactivity in the basal ganglia as a dopamine partial agonist. This report has shown that the [18F] N -(3-Fluoropropyl)-2β-carbon ethoxy-3β-(4...

Introduction Over 80% of perimenopausal women experience various physical and neuropsychiatric symptoms due to changes in female hormones. However, accurate evaluation and treatment of menopausal symptoms are lacking due to limited evidence regarding customized treatment for each symptom type. This study aimed to identify and cluster psychosomatic...

Objective: Facial affect recognition is associated with neuropsychological status and psychiatric diseases. We hypothesized that facial affect recognition is associated with psychological status and perception of other affects. Methods: A total of 80 images depicting facial affect, including 20 Neutral, 20 Angry, 20 Fear, and 20 Sad, were screen...

The purpose of this study was to investigate effects of brain excitability by transcranial direct current stimulation (tDCS) on spike performances of professional female volleyball players. Thirteen professional female volleyball players were recruited for participation. We performed a randomized single-blind, SHAM-stimulus controlled, and counter-...

BACKGROUND Virtual reality has been suggested to be effective in enhancing physical exercise because of its immersive characteristics. However, few studies quantitatively assessed motion and brain activity during virtual reality exercises. OBJECTIVE We hypothesized that virtual reality could stimulate body movement and brain activity more effectiv...

Background: Virtual reality (VR) has been suggested to be effective at enhancing physical exercises because of its immersive characteristics. However, few studies have quantitatively assessed the range of motion and brain activity during VR exercises. Objective: We hypothesized that 3D immersive VR could stimulate body movement and brain activit...

Objective: This study aimed to evaluate whether somatic symptoms in adolescents with attention deficit hyperactivity disorder (ADHD) are associated with a dissociative pattern of functional connectivity (FC) within the default mode network (DMN) and whether methylphenidate administration can improve clinical and somatic symptoms. We also evaluated...

Objective: During the coronavirus disease (COVID-19) pandemic, several studies have found that Internet usage and gaming times have increased among adolescents. Parents' Internet literacy and attitudes toward Internet gaming have been reported to affect children's Internet gaming disorder (IGD). We hypothesized that parents' attitudes toward Inter...

Background: Smartphone use patterns may predict daily life efficacy and performance improvements in sports. Additionally, personal characteristics may be associated with smartphone overuse. Methods: We investigated the correlation between the temperament and character inventory (TCI) and academic performance using smartphone log data. We hypothe...

Deficits in color vision and related retinal changes hold promise as early screening biomarkers in patients with Alzheimer’s disease. This study aimed to determine a cut-off score that can screen for Alzheimer’s dementia using a novel color vision threshold test named the red, green, and blue (RGB) modified color vision plate test (RGB-vision plate...

Objective: This study aims to empirically determine if indirect exposure to client violence has significant negative effects on social workers' posttraumatic stress disorder (PTSD) the same way direct victimization does. Methods: Using a sample of 1,359 social workers drawn from the data collected by the Seoul Association of Social Workers, this...

Background: Education on internet games for parents and internet game literacy are needed to prevent problematic internet game playing in Korea. We created an 18-item Internet Game Literacy Scale (IGLS). It is a valuable tool for assessing the positive and negative aspects of internet game play. We aimed to determine the validity of the IGLS and t...

Background and objectives: Digital therapeutics are an emerging type of medical therapy and are defined as evidence-based therapeutic interventions for patients by means of qualified software programs to prevent, manage, or treat medical conditions. Today, digital therapeutics products are on the market or under development for a wide range of med...

A close link has been established between self-harm and suicide risk in adolescents, and increasing attention is given to social media as possibly involved in this relationship. It is important to identify indicators of suicidality (i.e., suicide ideation or attempt) including aspects related to contagion in online and offline social networks and e...

Olfactory impairment is associated with dementia and is a potential early biomarker of cognitive decline. We developed a novel olfactory threshold test called Sniff Bubble using rose odor-containing beads made with 2-phenylethyl alcohol. We aimed to define cut-off scores for this tool to help identify cognitive decline among elderly people. In tota...

Objective: In somatic symptom disorder (SSD), cognitive dysfunction is related to perceptive distortion that excessively amplifies bodily sensations. The association between high body mass index (BMI) and cognitive dysfunction could be attributed to underlying systemic inflammation. We aimed to evaluate whether patients with SSD and high BMI exhib...

Smartphone app-use patterns will predict professional golfers’ athletic performance, and the use time of serious apps would be associated with improved performance. This longitudinal 4-week observation of 79 professional golfers assessed golf handicaps and smartphone app-use patterns at the start of the Korean professional golf season and 2 and 4 w...

Objective We aimed to identify differences in brain functional connectivity (FC) and characteristics of body sensation between sports players and patients with somatic symptom disorder (SSD), in order to investigate the neurobiological basis of SSD. Methods Thirty-five sports players (SPORTS group), 36 patients with SSD (SOM group), and 33 healthy...

Introduction: Complex post-traumatic stress disorder (C-PTSD) is characterized by the typical symptoms of PTSD, in addition to affective dysregulation, negative self-concept, and disturbances in interpersonal relationships. Children and adolescents with C-PTSD have been reported to have deficits in emotional and cognitive functions. We hypothesized...

Introduction: The results of studies comparing the characteristics of Internet gaming with those of Internet gambling have been controversial. We hypothesized that problematic web-based board gaming behaviors are associated with psychological and social interaction factors. We also hypothesized that non-problematic adolescent Internet gaming is a p...

BACKGROUND Stress management within the workplace is important for a healthy mental and physical state. Due to technological advancements, individual-tailored therapy as well as online cognitive-behavioral therapy (CBT) is on the rise. OBJECTIVE This study analyzed the efficacy of a smartphone application based on third-wave CBT tailored to the in...

Background Stress management in the workplace is essential for a healthy mental and physical state. Due to technological advancements, individually tailored therapy and online cognitive behavioral therapy (CBT) are on the rise. Objective This study analyzed the efficacy of a smartphone app based on third-wave CBT tailored to an individual. MethodsA...