You can test your attention span using simple exercises at home or through standardized clinical assessments administered by a professional. The approach depends on whether you want a rough personal benchmark or a formal evaluation for something like ADHD. Either way, attention isn’t a single skill. It breaks down into several types, each measured differently, and understanding that distinction helps you pick the right test.
The Three Types of Attention That Get Tested
Attention researchers break the skill into subcategories, and each one shows up differently in daily life. Selective attention is your ability to filter out irrelevant information while locking onto what matters, like following a conversation in a noisy restaurant. Sustained attention is holding focus on a single task over time, the kind you need during a long meeting or while reading a textbook chapter. Then there’s divided attention, which involves splitting your focus between two tasks at once.
Most people searching for ways to test their attention span are really asking about sustained attention: how long can I stay focused before my mind drifts? But selective attention matters too, especially if you find yourself constantly pulled off task by notifications, background noise, or stray thoughts. Clinical tests measure these separately because someone can score well on one and poorly on another.
A Simple Test You Can Do Right Now
The digit span test is one of the oldest and most widely used attention measures in psychology, and you can run a basic version at home with a partner. One person reads a series of numbers aloud, one digit per second, in a flat, even tone. The other person repeats them back immediately. Start with a sequence of three digits. If you get it right, move to four, then five, and keep going until you fail two attempts at the same length.
Most adults can accurately recall about seven digits forward, give or take two. That range (five to nine) reflects your basic attentional capacity. To make the test harder and measure working memory more directly, try it backward: your partner says “7-1-9” and you respond “9-1-7.” Backward spans are typically shorter, around four to six digits for most adults.
A few rules matter for accuracy. The person reading the numbers should not group them or repeat them. Each digit gets the same tone until the last one, where the voice drops slightly to signal the end of the sequence. If you get the right numbers but in the wrong order, that’s a partial success, not a complete failure. The test ends when you miss both attempts at the same sequence length.
Timed Focus Tests for Sustained Attention
The digit span test captures short-term attentional capacity, but it doesn’t tell you how long you can maintain focus. For that, you need a task that runs over minutes, not seconds. Here’s a straightforward approach: set a timer and read something moderately challenging, like a long magazine article or a textbook chapter. Note the exact moment your mind first wanders completely off the material. That’s your rough sustained attention baseline.
For children, expected attention spans vary by age. Kids between 5 and 8 typically sustain focus for 12 to 24 minutes. Between ages 9 and 11, that window extends to 20 to 30 minutes. Adolescents aged 12 to 14 can manage 25 to 40 minutes, and by ages 15 to 18, attention spans reach up to 48 minutes. Adults generally peak somewhere beyond that, though individual variation is enormous and depends heavily on interest, sleep, and the nature of the task.
Another option is a go/no-go task, which you can find in various free apps. The concept is simple: a stimulus appears on screen and you tap when you see a target (say, a green circle) but hold back when you see a distractor (a red circle). The test runs for 10 to 20 minutes, and your accuracy and reaction time both degrade as the test goes on if sustained attention is a weakness.
Clinical Tests Professionals Use
If you suspect a genuine attention disorder, home tests aren’t enough. Clinicians use standardized, normed assessments that compare your performance against thousands of people your age. Two of the most common are the Test of Variables of Attention (TOVA) and the Stroop Color and Word Test.
The TOVA is a computer-based task that takes about 20 minutes. You watch a screen showing a square that appears in either the upper or lower half. When it’s in the upper half, you click. When it’s in the lower half, you don’t. It sounds trivially easy, and that’s the point. The test is deliberately boring because it’s measuring whether you can maintain accurate responses over time when nothing interesting is happening. The software tracks reaction time, missed targets, and false responses down to the millisecond, then compares your profile to age-matched norms.
The Stroop test measures selective attention and your ability to override automatic responses. You see color words (like “RED” or “BLUE”) printed in mismatched ink colors, and you have to name the ink color while ignoring the word itself. Saying “green” when you see the word “RED” printed in green ink requires real cognitive effort. The gap between your speed at reading words normally and naming mismatched ink colors reveals how well you can suppress interference. A large gap can signal problems with selective attention or cognitive flexibility.
What Screens Have Done to Attention
If your attention span feels shorter than it used to be, you’re not imagining it, at least on screens. Research from the University of California tracked how long people stayed focused on a single screen over nearly two decades. In 2004, the average was two and a half minutes. By 2020, it had dropped to 47 seconds. That number appeared to stabilize around 2016 and held steady through the start of the pandemic.
Whether this translates to a genuine decline in underlying attentional capacity is less clear. Correlational studies on smartphone use and attention have produced mixed results. There’s solid evidence that phones distract you while you’re using them, pulling focus away from whatever else you’re doing. But the fear that heavy phone use permanently shrinks your ability to concentrate, even when the phone isn’t present, doesn’t yet have strong longitudinal data behind it. The public perception that kids are developing shorter attention spans from screen time is widespread, but the research hasn’t confirmed a straightforward cause-and-effect relationship.
When Testing Points Toward ADHD
Poor attention test scores alone don’t equal an ADHD diagnosis. The diagnostic criteria require a persistent pattern of inattention that interferes with daily functioning for at least six months. For children and adolescents, six or more specific symptoms need to be present. For adults 17 and older, the threshold drops to five symptoms. These include things like frequently making careless mistakes, struggling to sustain attention during tasks or conversations, appearing not to listen when spoken to directly, and being easily distracted by unrelated stimuli or thoughts.
Crucially, these symptoms must show up across multiple settings (not just at work or just at school) and must not be better explained by anxiety, mood disorders, or substance use. ADHD also comes in subtypes: predominantly inattentive, predominantly hyperactive-impulsive, or combined. Someone who scores poorly on sustained attention tests but has no hyperactivity might fit the inattentive presentation, which is frequently missed in girls and adults because it doesn’t look like the stereotypical restless, impulsive version.
Severity matters too. A mild case involves symptoms just meeting the threshold with limited impairment. A severe case involves many symptoms beyond the minimum, with noticeable disruption to work, school, or relationships. Clinicians also recognize partial remission, where someone previously met full criteria but now shows fewer symptoms while still experiencing some impairment.
How to Get Accurate Results
Whether you’re testing at home or in a clinic, several factors can skew your scores in ways that don’t reflect your true baseline. Sleep is the biggest one. Even mild sleep deprivation reliably impairs sustained attention, sometimes dramatically. If you slept five hours and then take an attention test, the result tells you more about your fatigue than your attentional capacity. Time of day also matters: most people perform better on cognitive tasks during mid-morning than late afternoon, though individual chronotype plays a role.
Caffeine can artificially boost performance on attention tasks, which is useful information if you always test after coffee but want to know your unassisted baseline. Stress and anxiety tend to hurt sustained attention while sometimes paradoxically sharpening selective attention for threat-related stimuli. And motivation counts more than people realize. A boring task in a quiet room with no stakes will pull lower scores than the same task when you’re genuinely trying to perform well.
For the most meaningful self-assessment, test under consistent conditions: same time of day, similar sleep the night before, similar caffeine intake. Run the test three or four times across a week and look at the pattern rather than any single result. If you consistently struggle to maintain focus for age-appropriate durations, or if your digit span falls well below five, that’s worth bringing to a clinician who can administer standardized tools and interpret the results in context.