The screens culture: impact on ADHD. (2011)

Introduction

The past decade has seen an exponential growth in the use of Internet, video games, downloadable television, music and movies, and social networking (Media Awareness Network 2005; Smith et al. 2009). This change in our culture has had a marked impact on the development and daily activities of children. From a cognitive point of view, it has increased the use of visual relative to auditory communication and placed a premium on short snippets of communication rather than sentences and paragraphs. Where previously childhood consisted of free play in large group games, many children now live in a world of web-based media that may be foreign to many parents and even more alien to most grandparents. The emergence of this “screen culture” has been a paradigm shift in the world of childhood, and the implications of this bear some thought.

In 2008, the McCreary Centre Society (Smith et al. 2009), a non-government, nonprofit organization, provided research on screen time in the general adolescent population in Canada. Results indicated that on an average school day, 25% of youth spent upwards of 3 h watching TV and/or playing on the Internet and 15% played video games for more than 3 h (Smith et al. 2009). This is similar to another recent study of Canadian youth by Mark et al. showing average daily screen time of 3 h/day (Mark and Janssen 2008). There is a suggestion that high-risk youth may spend even more time in front of screens, with a recent study showing daily screen time of almost 7 h/day in youth attending a psychiatric clinic (Baer et al. 2011). If the average child is spending one-third of their day on screen activities and high-risk children are spending most of their leisure hours on screens, risks and benefits must be evaluated from two points of view. First, what is the effect of this degree of exposure? Second, what is the effect of the loss of those activities that have been abandoned in its stead?

Concerns about overuse of these electronic tools have led to use of the term “internet addiction” (Byun et al. 2009). Various definitions for Internet addiction have been proposed based largely on criteria for substance abuse and impulse control disorders including compulsive gambling (Beard 2005; Demetrovics et al. 2008; Ko et al. 2005b; 2009c; Shaw and Black 2008; Tao et al. 2010; Fu et al. 2010). Proposed criteria focus on such factors as children’s preoccupation with Internet activities, their inability to control their use, and their distress when use is limited. Continued use despite interference with other essential activities in children’s lives such as learning, socializing, eating, or sleep is a key factor. There are marked differences of opinion between parents and children about whether Internet gaming is a good use of time, and differences between parents and children in ADHD research in general are endemic in the field. Concern about this phenomenon is widespread, with some arguing it should be included as a “disorder” for the Diagnostic and Statistical Manual V (Block 2008; Hinic et al. 2008; Kratzer and Hegerl 2008; Miller 2007; Pies 2009).

In 2006, Ha and colleagues did an early study that showed out of 455 children and 836 adolescents, 14% of children and 20% of adolescents screened positive for excessive Internet use (Ha et al. 2006). Similar studies reporting Internet addiction in children and youth have been reproduced around the world: in Korea (Cho et al. 2008; Park et al. 2008), Turkey (Ceyhan 2008), Taiwan (Lin and Yu 2008; Wan and Chiou 2006) Czechoslovakia (Simkova and Cincera 2004), Singapore (Mythily et al. 2008), Romania (Chirita et al. 2006), Italy (Coniglio et al. 2007; Ferraro et al. 2007), Iran (Ghassemzadeh et al. 2008), Greece (Siomos et al. 2008), Norway (Johansson and Gotestam 2004), and China (Song et al. 2010; Xu et al. 2008). Reported rates of addiction typically range between 2 and 20% with some reporting as high as 25% (Zboralski et al. 2009). A comparative study found significantly higher rates of Internet addiction in China than the United States, suggesting cultural factors may play a role (Jackson et al. 2008). Baer et al. have shown that the presence of addictive features is correlated with psychopathology and functional impairment, whereas as screen time in the absence of addiction is not (Baer et al. 2011).

ADHD is well known to impart an increased risk of substance abuse disorders (Cumyn et al. 2009; Ohlmeier et al. 2007, 2008) as well as impulse control disorders such as compulsive gambling (Lawrence et al. 2009). This raises the question whether children with ADHD are more at risk of overuse of the Internet or off-line gaming.

Parents frequently complain about their children spending excessive amounts of time on gaming and the difficulty they experience in getting their child to comply with turning off the game. Children who are not otherwise oppositional may experience extreme rages if a parent pulls the plug in the middle of a game when a child is non-compliant with instructions to turn it off. Parents present clinicians with many questions: “How much time on the computer is reasonable?” “How can I get my child to learn how to turn the computer off?” “If he is on the computer all the time, he’s not playing with other children or playing sports, is this a problem?” While some guidelines on “screen time” have been created (AAP 2001), clinicians are typically left to rely on their personal opinions in answering many of these questions.

The objective of this article is to review the research on the relationship between use of the Internet and non-Internet-based (off-line) video gaming with ADHD. This review will address several issues. What research has been done to determine whether ADHD is a risk factor for increased time in front of the computer or gaming station? If so, what do we know about ADHD that might make these children more vulnerable? Is there any suggestion that Internet and gaming may worsen or improve ADHD core symptoms? We will review what has been written about the treatment for overuse of Internet and gaming activities or “internet addiction.” Finally, we will summarize what is known to date, methodological limitations in the research, and possible areas of future study.

The relationship between ADHD, the Internet, and off-line video gaming

While most of the studies on Internet use are cross-sectional, one recent prospective study followed over 2,000 adolescents for 2 years to determine whether the presence of psychiatric symptoms would predict later development of Internet addiction (Ko et al. 2009b). While depression and social phobia were also associated with later problems (particularly in girls), ADHD was shown to be the most significant predictor for the development of Internet addiction, followed by hostility, after controlling for sex and age. Looking at gender groups separately, hostility was the strongest predictor in boys and ADHD was the strongest predictor for girls.

This prospective study is consistent with results from several cross-sectional studies looking at the association between ADHD symptoms and Internet addiction (Chan and Rabinowitz 2006; Ha et al. 2006; Yen et al. 2007, 2009; Yoo et al. 2004). Yen et al. found that ADHD symptoms correlated with Internet addiction in a sample of over 2,500 college students (Yen et al. 2009). The strongest association was seen in female students, similar to the results in the Ko et al. prospective study. Similar associations have been found in younger age groups as well, with Yoo et al. showing higher ADHD symptoms in elementary students with Internet addiction (Yoo et al. 2004). Associations between ADHD and Internet addiction have also been shown in the adolescent population with Yen et al. reporting higher levels of ADHD, depression, and hostility in boys with Internet addiction, and higher levels of ADHD and depression in girls with Internet addiction (Yen et al. 2007). Chan et al. have noted a correlation between severity of ADHD symptoms (particularly inattention) and time spent on the Internet (Chan and Rabinowitz 2006).

ADHD traits such as impulsivity (Cao and Su 2007; Cao et al. 2007), extraversion (Mottram and Fleming 2009), disinhibition (Sun et al. 2009), and low self-esteem (Niemz et al. 2005) correlate with Internet use and abuse. One small study directly compared video game playing in children with ADHD versus controls (Bioulac et al. 2008). Interestingly, there was no difference in frequency or duration of video game play between the two groups. However, the children with ADHD showed higher levels of addiction than controls, suggesting that it is not time so much as the capacity for use to become more driven and problematic that differentiates Internet use in ADHD compared to the general population.

Further evidence for a connection between ADHD and Internet use is found in a provocative treatment study by Han et al. looking at the effect of methylphenidate treatment on video game play (Han et al. 2009). In this study, 62 drug-naïve children with ADHD and Internet addiction were treated with 8 weeks of methylphenidate. Along with reduction in ADHD symptoms, both Internet usage times and scores on Internet addiction tests were shown to decrease over the treatment period.

In summary, there is a growing body of evidence for an association between problematic Internet and off-line video gaming use and ADHD. While other psychiatric symptoms such as depression and anxiety have also been shown to be associated with Internet addiction (Chak and Leung 2004; Ryu et al. 2004; Shapira et al. 2000), the Ko et al. prospective study shows that ADHD is the strongest predictor (Ko et al. 2009b). This begs the question, why? What is it about children with ADHD that makes them particularly vulnerable to overuse of the Internet and off-line gaming?

ADHD youth may have a predisposed vulnerability to the immediacy of feedback as well as the multimodal and high stimulation nature of games. Most games are built so that there is an incentive to “get to the next level,” which has an immediacy that makes it a particularly salient reward incentive to ADHD patients. In addition, rapidly changing screens put minimal demands on attention and working memory (Van De Voorde et al. 2010), forced effort, or writing (Adi-Japha et al. 2007) all of which are difficult in ADHD. Individuals with ADHD tend to seek enhanced stimulation of the reward pathway (Volkow et al. 2009). Video gaming has been shown to increase striatal dopamine release (Koepp et al. 1998) activating this reward pathway. Further evidence for this hypothesis is found in a study by Han et al., which showed youth with Internet addiction had higher reward dependency and increased prevalence of specific polymorphisms of the dopamine receptor gene implicated in alcoholism and pathologic gambling, when compared with normal controls (Han et al. 2007). There is no research that has examined whether Internet addiction in youth is associated with increased risk for Internet gambling in adulthood, but assuming that Internet addiction is comparable to other addictions, one might anticipate that childhood exposure may be a gateway to more serious problematic Internet use in adulthood such as pornography or gambling.

ADHD symptoms and Internet or gaming addiction may share a bidirectional relationship where the symptoms of ADHD make gaming attractive, while gaming itself exacerbates ADHD symptoms by providing an activity that continuously reinforces the exact disinhibition, quick responsiveness, need for immediate reward, and inattention that are areas of concern. In this sense, the prolonged hours of Internet and gaming use may further reinforce and consolidate the child’s proclivity to impulsive, rapid, hyper-focused reactivity. This is also in contrast to the types of activity that might have otherwise filled the same leisure hours such as complex play, sports, music and arts, or organized youth clubs, which would help develop attention, self-control, behavioral inhibition, self-discipline, team skills, and socialization. Even if Internet addiction is not responsible for worsening ADHD symptoms, lack of exposure to these activities might be associated with a decrease in practice opportunities for working memory, patience, attention, and executive functioning (Diamond 2007; Diamond et al. 2007). There are then several pathways that might explain the bidirectional association between Internet addiction and ADHD.

Summary

This review of the literature suggests that there is a correlation between Internet and off-line video gaming use and psychiatric disorders, particularly ADHD. While the condition of “internet addiction” remains controversial (Shaffer et al. 2000), the consensus of the global literature to date, is that Internet addiction is a disorder in its own right, and that for those who are vulnerable it presents a serious risk with demonstrable impairment and increased psychiatric symptomatology. It remains unclear whether the Internet use itself is the causal factor for increasing psychiatric symptoms and impairment or a simply a reflection of underlying difficulties. We additionally do not yet know whether there is a potential for these media to improve the lives of children, for example by opening up new avenues of learning or increasing opportunities for socialization. However, the evidence presented in this review makes a strong case for a connection between ADHD and Internet, and off-line video gaming use, suggesting that the clinician assessing children with ADHD should routinely inquire about these activities. Stronger conclusions await better definitions of terms such as “internet addiction” and the development of standardized, validated assessment measures for youth. We are in immediate need of systematic research into the etiology of the relationship of computer use and abuse and ADHD, its risks, possible benefits, and treatments. Specifically, future research is required to determine whether there is increased engagement in social and developmentally enriching activities when screen time is decreased; a cohort study of ADHD children versus normal controls for total screen time and further exploration of measurement of the relationship between screen time and functional impairment. We need the answers to the questions every parent is asking.

Open Access

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