Attention and habit
Is technology addiction real
One digital behaviour has a diagnostic code and it is gaming; every headline figure about phone or internet addiction comes from screening scales with no validated cut-off.
One digital behaviour has a diagnostic code, and it is gaming. Gaming disorder entered the World Health Organization's ICD-11, in force since 1 January 2022, with a threshold requiring both duration and real functional impairment. Nothing else did. There is no "internet addiction" category and no "smartphone addiction" category in ICD-11, and neither exists as a formal diagnosis in DSM-5-TR, where internet gaming disorder sits in the section reserved for conditions needing further study. That is the formal position. Everything beyond it — the pooled prevalence percentages, the claim that a quarter of the population is addicted to a phone, the comparisons with cocaine — rests on self-report questionnaires that give wildly different answers for the same people depending on where researchers draw the line. For a workplace-oriented comparison point on how digital activity is translated into metrics, see self-reporting bias.
Only gaming disorder has a code
WHO's guidance is careful in a way that coverage of it is not. It sets a twelve-month minimum, requires impairment in personal, family, social or occupational functioning, and states that the condition affects only a small proportion of gamers.
Gaming disorder (ICD-11 code 6C51) is the only digital-behaviour addiction in the classification, and WHO requires the pattern to be evident for at least 12 months and to cause significant functional impairment.
Direction: Increase. Strength of evidence: Strong.
Caveat A classification decision rather than a prevalence estimate — WHO attaches no number to "small proportion", and ICD-11 has no internet or smartphone addiction category.
The American Psychiatric Association went less far. Internet gaming disorder sits in Section III of DSM-5-TR, "Conditions for Further Study", the same holding area as caffeine use disorder; gambling disorder remains the only behavioural addiction the manual recognises.
Internet gaming disorder is not a formal DSM diagnosis and requires 5 of 9 proposed symptoms within 12 months to meet the research criteria; the APA's own page cites a prevalence range of 0.3–1.0%.
Direction: No detectable effect. Strength of evidence: Strong.
Caveat The same page notes that more recent studies suggest higher rates, so even the authoritative body presents the range as unresolved.
The prevalence figure depends on the questionnaire
The pooled estimates that circulate as facts come from meta-analyses of screening scales, not counts of diagnosed people.
Pooled prevalences were 26.99% for smartphone addiction, 17.42% social media, 14.22% internet, 8.23% cybersex and 6.04% gaming addiction.
Direction: Increase. Strength of evidence: Mixed.
Caveat The figures rest on self-report scales with no clinical interview and no validated cut-offs, and prevalence varied by region, period, gender and assessment scale.
How much does the instrument matter? One analysis re-scored thirteen samples using the range of cut-offs other researchers had published on a single 60-point scale.
Prevalence of addictive smartphone use ranged from 14.2% to 52.7% in the same samples depending purely on which SAS-SV cut-off was chosen, with published cut-offs varying from 26 to 40 on a 60-point scale.
Direction: Cuts both ways. Strength of evidence: Strong.
Caveat Convenience samples of young adults, and the point is methodological rather than epidemiological: no clinical benchmark exists against which a cut-off could be validated.
The same instability has been quantified directly in the gaming literature.
Pooled global prevalence of gaming disorder was 3.05%, falling to 1.96% when restricted to rigorously sampled studies, with the choice of screening instrument alone explaining 77% of between-study variance.
Direction: Increase. Strength of evidence: Mixed.
Caveat The rigorous-sampling confidence interval runs from 0.19% to 17.12%, effectively uninformative, and a 2023 corrigendum revised the headline figure to 2.96%.
The strictest test finds a fraction of a per cent
Applied to nationally representative samples rather than volunteers, the number collapses — and those above the line look much like everyone else.
Only 0.3–1.0% met the DSM-5 threshold for Internet Gaming Disorder, and those who did showed no statistically significant differences in mental, physical or social health.
Direction: No detectable effect. Strength of evidence: Strong.
Caveat Cross-sectional self-report testing the DSM-5 criteria specifically, so it does not bear directly on ICD-11's narrower impairment-focused definition.
That gap — roughly one person in a hundred on a clinical threshold against one in four on a screening scale — is the whole argument, and it is why the numbers in how much people actually use their phones should not be read as measures of pathology.
The diagnosis was contested before it existed
Recognition was not a consensus event: scholars objected formally while the proposal was still open.
Twenty-six researchers opposed the ICD-11 gaming disorder proposal on four grounds, including the risk of abundant false-positive cases, especially among children and adolescents.
Direction: Cuts both ways. Strength of evidence: Mixed.
Caveat A debate paper rather than new data, and it drew published rebuttals in the same issue arguing that inclusion carried more advantages than disadvantages.
Seven years on, the practical machinery is still missing: a 2025 narrative review in BMC Psychiatry reports no gold-standard instrument, criteria such as loss of control that are unstable over time, and gaming and gambling disorder wording that is almost identical.
What the label does to the argument
Calling heavy use an addiction imports expectations — tolerance, withdrawal, relapse, a treatment pathway — that the measurement base does not support outside gaming. It also implies a remedy, abstinence, whose measured effects are set out in what abstinence trials actually find. The honest description of most heavy phone use is that it is heavy, that some of it is unwanted, and that no diagnostic system has agreed where ordinary heavy use ends.
The short version
- Gaming disorder is the only digital-behaviour addiction in ICD-11, and WHO requires twelve months of the pattern plus significant impairment before it applies.
- Internet gaming disorder is not a formal DSM diagnosis; it sits in DSM-5-TR's section for conditions needing further study, alongside caffeine use disorder.
- Screening-scale prevalence for smartphone addiction reached 26.99% across 504 studies (Meng et al., Clinical Psychology Review, 2022), a figure produced by questionnaires rather than clinicians.
- Applying DSM-5 criteria to nationally representative samples put the figure at 0.3–1.0%, with no significant health differences among those who qualified (Przybylski et al., American Journal of Psychiatry, 2016).
- The evidence cannot settle the question: with no gold-standard instrument and no validated cut-off, any prevalence figure describes the scale used as much as the population.