Mark D Griffiths

Nottingham Trent University | NTU · Psychology Department

Aim: This study aimed to examine the co-morbidity and temporal relationship between substance abuse disorders (SUDs) and gambling disorder (GD). Method: Cross-tabulated census data were retrieved from the Norwegian Patient Registry. The data included the number of patients by year of first-time incidence of GD and/or SUD diagnoses, age and sex from...

The 11th Revision of the International Classification of Diseases (ICD-11) formally recognized gaming disorder as an addictive health disorder like gambling disorder. The ICD-11 assumes that excessive online gaming can lead to functional/clinical impairments and psychological distress among a minority of individuals. The present study investigated...

The present study is the first to examine account-based tracking data of Portuguese online lottery players comprising the gambling activity of all active players over a one-year period (N = 154,585). The main research goal was the identification of groups or segments of players by their engagement levels (high, neutral, low) and to assess preferenc...

The present study sought to provide empirical evidence for the sequential mediating role of social comparison orientation and fear of missing out (FoMO) in the relationship between self-concept clarity (SCC) and problematic smartphone use (PSU) within the framework of the Interaction of Person-Affect-Cognition-Execution (I-PACE) model. A sample of...

Background: The present study examined (i) the potential differentiated relationship between three forms of social comparison previously identified as particularly relevant within the context of eating disorders (EDs) (i.e., those related to body, eating, and exercise) and depressive symptomatology among adolescents, and (ii) whether this relations...

Introduction Gaming disorder (GD) is the result of an interplay between gaming-related factors, individual factors, and environmental factors. Current research primarily highlights single types of factors. Consequently, the present study simultaneously analyzed the role of individual factors, such as self-control dimensions and motives for gaming,...

Nomophobia (the fear of being without a mobile phone or being unable to use it) is an area of growing research interest. The 20-item Nomophobia Questionnaire (NMP-Q) is the most popular instrument to assess nomophobia. However, there is no validated scale to assess nomophobia in Bangladesh. The present study translated and validated the NMP-Q into...

Background and aims Gaming disorder [GD] risk has been associated with the way gamers bond with their visual representation (i.e., avatar) in the game-world. More specifically, a gamer's relationship with their avatar has been shown to provide reliable mental health information about the user in their offline life, such as their current and prospec...

Background The eleventh revision of the International Classification of Diseases (ICD-11) defines the three key diagnostic criteria for gaming disorder (GD). These are loss of control over gaming, gaming as a priority over daily activities, and impaired functioning due to gaming. While this definition has implications for the prevention and treatme...

Background The benefits of physical activity are well-known to prevent multiple long-term health conditions. Physical appearance and weight-related stigma may influence individuals’ decision to engage in physical activity and sport. Therefore, the present study examined the psychometric properties of a newly developed instrument, the Tendency to Av...

As observed in other mental health difficulties, behavioural addiction is a complex construct with several potential predisposing factors, which include biological factors (e.g., genetic predispositions), psychological factors (e.g., personality traits), and social factors (e.g., family, and social history). One factor that may play a significant r...

Previous literature has suggested that victimization is linked to low self-esteem and increases the symptoms of gaming disorder. However, little is known about the intra-individual processes, and the temporal dynamics of cyber-victimization, self-esteem, and gaming disorder symptoms. To address this gap, a three-year longitudinal study was performe...

Background The study investigated ethnicity as a risk factor for gambling disorder (GD), controlling for demographics, citizenship, and years of residency in Norway. Methods The sample comprised 65,771 individuals from a national patient registry (n = 35,607, age range 18–88 years) and a national social insurance database in Norway (n = 30,164, ag...

Aims: To compare adolescents clinically diagnosed with Internet Gaming Disorder (IGD) and problematic internet use (PIU) in terms of cyberbullying, aggression, and loneliness. Methods: Male adolescent patients (N=124, 14.3±1.7 years) with Internet Addiction Scale (IAS) scores ≥50 were clinically interviewed for IGD in utilizing DSM-5 criteria. P...

Robert Merton (1968) coined the term “The Matthew Effect in Science” to explain by biblical analogy how famous scientists are sometimes credited more than those who are lesser known but more deserving. Leading Darwin scholars have admitted Patrick Matthew (1831) originated the theory he uniquely called the “natural process of selection”, which Char...

Background and aims The aim of the present study was to examine the mental representations of the use of different substances and other potentially addictive behaviors in order to explore meaningful similarities and differences that may contribute to a better understanding of behavioral addictions’ representations and diagnostic criteria. Methods...

The present systematic review and meta-analysis assessed the prevalence, sociodemographic factors, mental health disorders, and type of drug use disorders associated with problem/pathological gambling among individuals with substance use disorders (SUDs). Published studies before January 1, 2023, were reviewed. Out of 8351 papers initially identife...

Binge gambling is a relatively under-explored area and the few published studies have all used self-report data (i.e. surveys and interviews). The use of account-based tracking data has increasingly been used to identify indicators of problem gambling. However, no previous study has ever used tracking data to operationalize and explore binge gambli...

Given that there is limited evidence concerning the psychometric properties of DASS-21 when applied to primary school students, the present study undertook a comprehensive exploration of the psychometric evidence supporting the use of the DASS-21 within this demographic. The research comprised three studies. In Study 1, the basic psychometric prope...

Background: Self-care can include the activities that individuals perform in accordance with their needs to maintain and promote their health. Puberty is the most important change that comes with adolescence, which necessitates adolescents to become aware of their sexual and reproductive health. Objectives: The objective of the present study was to...

Esports gambling has steadily grown in popularity alongside esports itself. While research has been increasing in the field of esports-related gambling, no study has yet reviewed the relevant literature on esports gambling. The present study aimed to comprehensively review all empirical research conducted in the wider field of esports gambling. A s...

Background During the period of adolescence, several major developmental changes occur that can have significant impact on an individual’s brain structure and functioning through their entire life. Aims The present study aimed to examine the association between depression and self-esteem alongside specific sociodemographic factors among school-goi...

Introduction Preventative factors in young people’s physical inactivity require further understanding, including related psychosocial factors (eg, body image and weight stigma). The Tendency to Avoid Physical Activity and Sport Scale (TAPAS) is a recently developed instrument to address this issue and the present study examined its psychometric pro...

Background Untangling the association between gambling disorder (GD) and income is complex. Financial strain is often a consequence of GD. At the same time GD is more prevalent in the context of poverty, suggesting income may be a risk marker for GD. Aims The aim of the present study was to investigate whether income is a risk marker for GD and wh...

Background In recognizing the need for a reliable and valid instrument to assess psychological distress among children and adolescents, the present study translated the newly developed Depression Anxiety Stress Scale for Youth (DASS-Y) into Chinese, while also comparing its psychometric properties with those of the well-established DASS-21 within a...

Growing empirical evidence suggests that an emerging online activity (i.e., mukbang watching) may be associated with negative mental and physical health outcomes. However, a large gap in the psychology of mukbang watching still remains. Based on the extant literature, the present study developed and validated psychometric instruments to assess prob...

Background: Ehlers-Danlos Syndrome (EDS) is a serious chronic condition that leads to diminished quality of life and psychological problems. The current study aimed to systematically reviewed the existing literature on EDS patients' health-related quality of life (HRQoL), calculate mean HRQoL value, and determine the association between demographic...

The present study aimed to develop and psychometrically test a scale by using the Theory of Planned Behavior (TPB) comprising two types of measurement (direct and belief-based [indirect]) to assess bystander help-giving intention to victims of dating violence among youth. A two-phase, mixed-method design was adopted. The primary source of the sampl...

Background: Addressing mental health of diabetic pregnant women is important as it might increase the chance of obstetric complications, preterm birth, and neonatal complications. Aim: The present study investigated the prevalence of anxiety and depression among pregnant women with diabetes and their predictors. Methods: A cross-sectional study was...

Problematic overstudying has been conceptualized as a potential addictive disorder and an early form of work addiction. Previous studies have shown that it is a different phenomenon from healthy learning engagement and is associated with considerable functional impairments. A valid, reliable, and convenient screening measure is warranted to provide...

Due to its computer-like features and applications, smartphone use has become a globally popular activity. Moreover, smartphones have become an important part of individuals’ daily lives. However, using smartphones excessively may result in smartphone addiction for a small minority of individuals. Consequently, the present study investigated the ro...

Background The present study investigated the relationship between spousal support during postpartum period and the sexual function and sexual quality of life among lactating women. Methods A cross-sectional study was carried out from October to March 2021 comprising 301 breastfeeding women referred to comprehensive health centers in Qazvin, Iran....

Purpose: Resilience continues to be an important concept in the nursing profession due to its significant role in personal healthcare, patients' healthcare, and leadership. The present study examined the mediating role of perceived stress in the association between mindfulness and resilience among registered nurses in order to understand their imp...

Background: The Exercise Addiction Inventory (EAI) is a valid and reliable instrument and has been used in numerous contexts and research studies. The EAI was recently revised (EAI-R), but the psychometric properties of the EAI-R have yet to be examined in an Italian context. Therefore, the present study aimed to validate the EAI-R among Italian-sp...

Objectives According to the World Health Organization, depression is a common mental health illness that is characterised by a persistent feeling of sadness and loss of interest. The present study examined the association of two mental health variables (ie, depression, anxiety) with quality of life (QoL) and the sociodemographic characteristics of...

Introduction: Social capital means having resources and support in relationships and social ties. It can affect the individual's quality of life and mental health. The present study investigated the association between social capital with psychological status and quality of life among low-risk and high-risk pregnant women. Methods: The present c...

Currently, six instruments have been developed using the 11th revision of the International Classification of Diseases (ICD-11) criteria for Gaming Disorder (GD). Two of these are the Gaming Disorder Test (GDT) and Gaming Disorder Scale for Adolescents (GADIS-A). The present study validated both the GDT and GADIS-A among a large sample of Chinese e...

Purpose: Inhaled medication adherence is an important issue for patients with chronic obstructive pulmonary disease (COPD) because adhering to inhaled medications could substantially improve their health. However, patients with COPD may not be always adhere to the prescribed inhaled medications. Therefore, understanding the underlying reasons for...

‘Danmu’ (i.e., comments that scroll across online videos), has become popular on several Asian online video platforms. Two studies were conducted to investigate the relationships between Danmu preference, problematic online video watching, loneliness and personality. Study 1 collected self-report data on the study variables from 316 participants. S...

Introduction Emotion regulation difficulties have an important role in the presence of negative self-image. These problems in the self-regulation of emotion could lead to negative emotional processes (such as anger) that can lead to body dissatisfaction. Therefore, the aim of the present study was to examine emotion regulation difficulties than can...

Purpose: Insomnia-related affective functional disorder may negatively affect social cognition such as empathy, altruism, and attitude toward providing care. No previous studies have ever investigated the mediating role of attention deficit in the relationship between insomnia and social cognition. Methods: A cross-sectional survey was carried out...

In recent years a number of studies have used objective gambling data from online gambling operators to study gambling behavior. A few of these studies have compared gam-blers' actual gambling behavior (using account-based tracking data) with their subjective gambling behavior (using responses from survey data). The present study extended previous...

Background: Interactions between social and personal behavioral choices might explain why individuals behave differently with respect to public laws and regulations, some of which are known to influence individuals’ health. Evaluation of such interactions needs valid assessment tools. Objectives: The primary objective of the present study was to de...

As research on gaming disorder (GD) is growing globally, the need for a valid and reliable instrument to assess GD has become crucial. Therefore, the present cross-sectional study translated and evaluated the psychometric properties of Gaming Disorder Test (GDT) and Gaming Disorder Scale for Young Adults (GADIS-YA) into Malay language versions. The...

Background According to the World Health Organization (WHO), the world faces numerous challenges, including disparities in the availability and quality of eyecare services for prevention, treatment, and rehabilitation. No previous study in Afghanistan has ever examined both mental and physical component of quality of life among patients with eye di...

Background: Street-involved children and youth (SICY) who work and live on/of the streets are more likely to inject drugs and engage in psychoactive substance use. Objectives: The present study aimed to identify the prevalence, distribution, sociodemographic determinants, and risk-taking associated with alcohol and drug use among SICY. Methods: Stu...

Objective The closure of schools and other educational institutes around the world has been one of the consequences of the COVID-19 and has resulted in online teaching. To facilitate online teaching, there has been an increase in the use of smartphones and tablets among adolescents. However, such enhancement in technology use may put many adolescen...

Gambling disorder is viewed by many as a behavioral addiction involving significant functional impairment and a deterioration in the quality of life. The aim of the present study was to explore the factors that can influence problematic gambling by specifically focusing on the role of attachment, alexithymia, dissociation, and impulsivity. The samp...

Introduction: Internet gaming disorder (IGD) is an emerging condition within the field of behavioural addictions. IGD has been demonstrated to be highly comorbid with many other mental health disorders. Among these, substance use has been associated with IGD, and there are underlying similarities between behavioural addictions and substance use di...

Gaming disorder (GD) has been recognized as a mental health problem, resulting in adverse and psychosocial consequences. Although previous evidence suggests poorer self-concept clarity (SCC) and avatar identification are associated with GD, less is known about the mediating role of body-image coping strategies (appearance-fixing and avoidance, a fo...

Problematic internet use (PIU) has been defined as an inability to control impulses to use the internet, and is associated with psychological, social, educational, and/or occupational problems. Considering the harmful effects of PIU, the present study evaluated a treatment intervention aimed at controlling PIU. A randomized control study investigat...

Introduction: Young adulthood is considered a critical period in terms of non-medical use of sedatives/hypnotics (NMUSH) as well as different types of behavioral addictions (BAs). However, the relationship between these behaviors has received scarce attention among young adult samples. Therefore, the aim of the present study was to investigate the...

Introduction: Previous research has established co-occurrence between substance use disorders (SUDs) and gambling disorder (GD). Less well understood is the temporal sequencing of onset between these disorders, and in particular whether SUD is a risk factor for GD. The present study examined the temporal order between registered diagnoses of SUD a...

Introduction: The associations between affiliate stigma, caregiving burden, psychological distress, and quality of life (QoL) among family caregivers of people living with dementia (PwD) have been demonstrated in the literature. However, there is a dearth of literature regarding how these factors could form a psychological mechanism. The present st...

Many items in current problem gambling screens focus on negative consequences of gambling and gambling-related harms. However, few problem gambling screens comprise items that are totally based on actual gambling behavior such as gambling duration, gambling frequency, or gambling late at night. The aim of the present study was to develop and valida...

Background Students in sub-Saharan African countries experienced online classes for the first time during the COVID-19 pandemic. For some individuals, greater online engagement can lead to online dependency, which can be associated with depression. The present study explored the association between problematic use of the internet, social media, and...

Introduction: The increased research examining social media addiction with its negative consequences has raised concerns over the past decade. However, little research has investigated the association between social media addiction and executive functioning as well as the mechanisms underlying this relationship. Methods: Using a survey, the pres...

Vaccination can sufficiently ameliorate the coronavirus disease-2019 (COVID-19). Investigating what factors influence vaccine uptake may benefit ongoing vaccination efforts (e.g. booster injections, annual vaccination). The present study expanded Protection Motivation Theory with possible factors including perceived knowledge, adaptive responses, a...

Background: The aim of the present study was to investigate the relationship between care burden and motivation of COVID-19 vaccine acceptance among caregivers of patients who have experienced a stroke and to explore the mediating roles of social media use, fear of COVID-19, and worries about infection in this relationship. Methods: A cross-sect...