Internet Addiction Test (IAT)
20-item version — Assess Internet dependency severity
The Internet Addiction Test (IAT) is a 20-item self-report scale developed by Dr. Kimberly Young (1998), adapted from DSM-IV criteria for pathological gambling. It is the most widely used Internet addiction screening tool worldwide, measuring the impact of online behavior on daily life, work/school, relationships, and psychological well-being. Takes approximately 5 minutes.
What Is the Internet Addiction Test (IAT)?
The Internet Addiction Test (IAT) was developed by Dr. Kimberly Young of St. Bonaventure University in 1998, adapted from DSM-IV criteria for pathological gambling. It is the most widely used Internet addiction screening tool internationally and has been translated into multiple languages including Chinese, French, Italian, Turkish, and Korean.
How Scoring Works
20 items, each rated 1-5 (1=Rarely, 2=Occasionally, 3=Frequently, 4=Often, 5=Always). Total score 20-100.
- 20-30: Average online user
- 31-49: Mild Internet addiction
- 50-79: Moderate Internet addiction
- 80-100: Severe Internet addiction
Psychometric Properties
- Internal consistency α = .90-.93 (original sample)
- Good test-retest reliability
- Exploratory factor analysis typically yields a six-factor structure
Scoring Guide
20 items, 5-point Likert scale (1=Rarely, 5=Always). Total score range 20-100. Classification: 20-30=Average user, 31-49=Mild addiction, 50-79=Moderate addiction, 80-100=Severe addiction. Chinese validation (Chen et al., 2003) suggests cutoff ≥58. Original Cronbach's α = .90-.93 (Young, 1998).
Result Interpretation
After completing the 20 questions, you'll receive an immediate, detailed report with:
- Your score — calculated automatically based on your responses
- Score interpretation — what your score means in practical terms
- Context — how your results compare to general population norms where available
All results are displayed instantly on screen. No account, email, or login required.