Nomophobia: A Post Office Invented the Word, and It Is Still Not a Diagnosis

If you have searched this word, you probably want to know two things: what it is, and whether you have it.

The short answers are that nomophobia is a score on a twenty-item questionnaire, and that "having it" is not a coherent question, because roughly everybody scores above zero. In the largest study to ask, 99.2% of 2,838 people registered some degree of it.

That is not a dismissal of anything you feel. It is a statement about the instrument. And the way this word travelled from a marketing survey to tens of thousands of research participants is a genuinely useful thing to understand, because it is how a lot of modern anxiety about technology gets manufactured.

Where the word came from

In 2008 the UK Post Office commissioned YouGov to survey 2,163 British adults about mobile phones. The headline finding was that 53% reported anxiety when they lost their phone, ran out of battery, or had no coverage, 58% of men and 48% of women. The word "nomophobia," from "no mobile phone phobia," was attached to the result.

It was a public-relations survey for a company that sells phone insurance. It was not research, it was not peer reviewed, and it was not designed to establish anything about mental health.

Worth noting from the same survey: only 9% said having the phone switched off made them anxious. Two figures, one instrument, wildly different implications depending on which one gets quoted. The 53% became the number that travelled.

Where the questionnaire came from

Seven years later, in 2015, Yildirim and Correia published the Nomophobia Questionnaire (NMP-Q) in Computers in Human Behavior. This is the instrument that essentially the entire subsequent literature runs on.

It was built in two phases. Phase one was semi-structured interviews with nine undergraduates at one large US Midwestern university. Phase two administered the resulting items to 301 undergraduates at the same institution and ran an exploratory factor analysis.

The result was 20 items across four factors: not being able to communicate, losing connectedness, not being able to access information, and giving up convenience. Internal consistency was high, Cronbach's α = .95, and it correlated r = .71 with an existing measure of mobile phone involvement.

So: a construct named by a post office, operationalised from nine student interviews, validated on 301 students at one university. Everything downstream inherits those origins.

To be fair to the instrument, its reliability has held up. A 2023 meta-analysis of the NMP-Q's psychometrics pooled 13 studies, N = 15,929, and found a pooled α of 0.93, 95% CI [0.91, 0.95], with the four-factor structure replicating across translations. The questionnaire measures something consistently. Whether that something is a disorder is a separate question.

It is not a diagnosis. Anywhere.

This is the single most important fact on this page and it is worth stating without hedging.

Nomophobia does not appear in DSM-5. It does not appear in DSM-5-TR. It does not appear in ICD-11.

The ICD-11 chapter that would contain it, "Disorders due to addictive behaviours," codes 6C50 to 6C5Z, contains exactly four entries: gambling disorder (6C50), gaming disorder (6C51), and two residual categories for other specified and unspecified disorders. There is no entity for nomophobia, smartphone addiction or phone dependence.

The paper most often cited as evidence that nomophobia is a recognised condition is Bragazzi and Del Puente (2014), which is titled as a proposal for inclusion in DSM-5 and states in its own text that nomophobia has not been included. A proposal is not a classification.

There is also a naming problem. A specific phobia, clinically, involves fear of an object or situation and avoidance of it. Nomophobia describes distress at the absence of a resource. Whatever it is, it is not structurally a phobia, and several researchers have said so.

The prevalence figures, and why they cannot mean what they look like

Two meta-analyses have pooled prevalence, and they agree closely with each other.

Measure	Jahrami et al. (2023)	Tuco et al. (2023)
Studies pooled	52	23 (of 28 reviewed)
Participants	47,399	11,300
Countries	20	8
Mild	25.80% [19.83-31.78]	24% [20-28]
Moderate	52.40% [44.21-60.60]	56% [53-60]
Severe	20.35% [16.51-24.20]	17% [15-20]

Roughly half the world moderate, roughly one in five severe. That is the statistic that circulates.

Now the part that does not circulate. The heterogeneity statistics for those pooled estimates are I² = 99.8%, 99.7% and 99.6% in Jahrami, and 91% to 95% in Tuco. I² measures how much of the variation between studies exceeds what chance would produce. At 99.8%, the studies are not estimating a common quantity. Pooling them produces a number that is arithmetically correct and descriptively meaningless.

You can see why from the underlying spread. On the same questionnaire, severe nomophobia was measured at 71% in Indonesia and 3% in Germany. A twenty-four-fold difference is not an epidemiological gradient. It is translation, response style and sampling.

The sampling is the other problem, and Tuco and colleagues document it precisely:

• Only 6 of 23 studies used random sampling.
• Fewer than half reported an adequate sampling frame or a sample-size calculation.
• Only 3 sampled across more than one university.
• 26 of 28 studies came from the Middle East and Asia; 2 from Europe and the Americas.

So the honest version of "half of people have moderate nomophobia" is: in mostly non-random samples of university students, drawn overwhelmingly from two regions, with heterogeneity at close to the theoretical maximum, the pooled figure is around 52%. That sentence is much less useful in a headline, which is why you have not seen it.

The study that gives away the game

Kaviani and colleagues (2020) administered the NMP-Q to 2,838 people and reported that 99.2% scored as having some form of nomophobia.

An instrument that identifies 99.2% of a population is not distinguishing between people. It is describing a condition of contemporary life, that most people are inconvenienced and mildly anxious when separated from a device that holds their money, their transport, their photographs, their work and their friends.

The authors reached the same conclusion, and this is the notable part: rather than treating the number as evidence of an epidemic, they argued against pathologising, suggesting high scores may reflect legitimate social need and shortcomings in offline life rather than individual dysfunction. Their data did show that severe scorers had much higher odds of problematic use patterns, odds ratios in the range of 10 to 14 for dependent, prohibited and dangerous use, but these are cross-sectional associations, not risks, and they may simply reflect that both measures tap the same underlying thing.

There is one open question the literature has not answered: whether nomophobia predicts anything over and above general anxiety or problematic smartphone use. No study we could find settles it in either direction. Given that the NMP-Q correlates r = .71 with an existing phone-involvement measure, that question is not idle.

What none of this establishes

Nothing causal. There is no longitudinal study and no experiment. Every figure above is cross-sectional. Nobody knows whether phone attachment produces anxiety, anxiety produces phone attachment, or a third thing produces both.

Nothing about cognition. No claim on this page concerns attention, memory, or brain function, because the nomophobia literature contains no such evidence. Borrowing findings from adjacent research to fill that gap would be the easiest way to get this subject wrong.

Nothing diagnostic. This article does not tell you whether you have anything, and no questionnaire online can. If phone-related distress is genuinely interfering with your life, that is worth raising with a clinician, not because nomophobia is a diagnosis, but because the distress is real regardless of what it is called.

That last point matters. "This is not a disorder" is not the same sentence as "what you are feeling is not real." The Kaviani reading gets the balance right: the discomfort is genuine; locating it inside the individual as a pathology is the error.

What is actually going on

A word was coined to publicise phone insurance. A questionnaire was built from nine interviews and validated on one campus. The questionnaire turned out to be reliable, so it spread. Tens of thousands of students filled it in, mostly in two regions, mostly through convenience sampling. The resulting numbers were pooled into confident-looking prevalence estimates with heterogeneity near the maximum possible value. And no diagnostic manual anywhere has ever recognised the thing being counted.

That is not a story about phones. It is a story about how measurement can manufacture the appearance of an epidemic, and it is worth recognising, because the same sequence is currently running on several other terms you will meet.

Nomophobia sits within the broader question of what carrying a device does to attention, see screens, attention and focus guide, phantom vibration for another widely mislabelled "syndrome," and use your phone less for what the intervention evidence supports.