The Internet Addiction Test (IAT) is a 20-item self-report questionnaire about internet-use habits and their effects on daily life. It can help someone reflect on patterns such as staying online longer than intended, neglecting responsibilities, or struggling to cut back. It is a screening and research measure—not a diagnosis by itself.
What the Internet Addiction Test measures
Developed by Kimberly S. Young, the IAT asks how often experiences related to internet use apply to the respondent. Its items address patterns and consequences including loss of control, neglected work or other responsibilities, sleep, relationships, and feelings when offline. The manual version asks respondents to consider the past month.
The questionnaire is a self-report measure: its result reflects the answers given, not an independent clinical assessment. A high score may be a reason to look more closely at whether internet use is causing distress or interfering with daily functioning, but it does not establish a disorder.
How the IAT is scored
In the manual’s version, each of the 20 items is rated from 0 to 5 according to how often the statement applies. Add the item ratings for a total from 0 to 100. Follow the instructions for the specific version you are using, since scoring and interpretation should not be assumed to be identical across copies or adaptations.
Free tools Windows power users keep installed
One-click scans. No signup required.
What an IAT score means
Published materials use different score categories. The Internet Addiction Test manual hosted by IIT Kanpur gives the following bands:
| Source and version | Score | Label used |
|---|---|---|
| Internet Addiction Test manual hosted by IIT Kanpur | 0–30 | Normal level |
| Internet Addiction Test manual hosted by IIT Kanpur | 31–49 | Mild |
| Internet Addiction Test manual hosted by IIT Kanpur | 50–79 | Moderate |
| Internet Addiction Test manual hosted by IIT Kanpur | 80–100 | Severe |
| Categories cited in a 2012 study of US college students | Less than 40 | Average |
| Categories cited in a 2012 study of US college students | 40 or more | Problematic |
| Categories cited in a 2012 study of US college students | 70 or more | Severely problematic |
These systems do not align: for example, the manual calls scores from 31 to 49 mild, while the college-study paper’s cited guidelines classify scores below 40 as average and scores of 40 or more as problematic. Treat any band as the interpretation of its named source, not a universally accepted clinical cutoff. Neither a low nor a high score alone diagnoses a disorder.
What studies say about the IAT’s evidence
Studies have not found one consistent structure for the questionnaire. Widyanto and McMurran’s 2004 online study included 86 valid respondents and identified six factors: salience, excessive use, neglecting work, anticipation, lack of control, and neglecting social life. The authors considered the scale useful for further research while noting the need for systematic psychometric testing.
A 2012 study of US college students found two interpretable factors, described as dependent use and excessive use. Its authors noted that prior factor analyses had suggested an ambiguous structure and concluded, “Further assessment of the IAT is warranted for both theoretical and psychometric reasons.”
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
A 2018 study of US young adults aged 21–28 reported a mean weighted kappa of 0.45 across the 20 items and described good reliability in that study population. Reliability in that particular sample does not establish diagnostic accuracy or performance for every age group, language, or setting. The 2012 paper also reported that 190 of 215 participants (88%) scored below 40 and 25 (12%) scored 40 or above under its stated categorization; those figures describe that study sample, not the wider population.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When to seek more than a questionnaire result
If internet use is causing distress or repeatedly disrupting sleep, relationships, work, study, or other responsibilities, consider discussing those effects with a qualified mental-health professional. A conversation can focus on what is happening in your life and what support may help; the IAT score alone does not determine whether treatment is needed.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
