Focus, Attention & Cognitive Control
ADHD & Attention FAQ
How ADHD affects attention and working memory, how the CPT works, and what actually helps focus. Take the free Attention & Focus test to see your sustained attention score.
What are the signs of ADHD in adults?
Adult ADHD presents as chronic difficulty sustaining attention, impulsivity, disorganisation, time blindness, emotional dysregulation, and poor working memory. Unlike the hyperactive child stereotype, adult ADHD is often primarily inattentive.
How is ADHD diagnosed?
ADHD diagnosis requires persistent symptoms across multiple settings (home, work, school), onset before age 12, and functional impairment. Standard tools include clinical interview, rating scales (Conners, ASRS), and often neuropsychological testing including attention and working memory tasks.
How does ADHD affect working memory and attention?
ADHD is strongly associated with deficits in the central executive component of working memory — the system that filters distractions and manages information in mind. People with ADHD typically score 1–2 standard deviations below average on digit span and sustained attention tasks.
Can adults develop ADHD, or is it always childhood-onset?
DSM-5 requires onset before age 12 for an ADHD diagnosis. Adults who are newly diagnosed typically had unrecognised childhood symptoms. True adult-onset ADHD without any childhood symptoms is controversial and rare — but adult diagnosis after years of compensation is very common.
What is the difference between ADHD and just having poor concentration?
ADHD is a neurodevelopmental condition with genetic basis and measurable neurological differences (especially in dopamine and norepinephrine systems). Poor concentration can have many causes: poor sleep, stress, phone addiction, boredom. The key differentiator is pervasiveness and developmental history.
How does the Continuous Performance Test detect attention problems?
The CPT presents stimuli rapidly and requires a response only to a specific target (e.g., press for X, not for other letters). It measures omission errors (missed targets — inattention) and commission errors (responding to non-targets — impulsivity). Both error types are elevated in ADHD.
Does caffeine help or hurt ADHD symptoms?
Caffeine modestly improves attention and reduces impulsivity in ADHD by blocking adenosine receptors, which indirectly boosts dopamine. Many adults with undiagnosed ADHD self-medicate with caffeine. It is far weaker than prescription stimulants — about 5–10% as potent as methylphenidate at typical doses.
What are the best evidence-based strategies for improving focus with ADHD?
Medication (stimulants or non-stimulants) has the strongest evidence — effect sizes of 0.8–1.0. Beyond medication: exercise (immediate dopamine boost), body doubles, time-blocking, minimising digital notifications, and the Pomodoro technique all have supporting evidence.
How does exercise affect ADHD symptoms?
Aerobic exercise produces an immediate 1–2 hour improvement in attention and impulse control that resembles a low dose of stimulant medication. This is one of the most robust non-medication findings in ADHD research. 20–30 minutes of vigorous exercise before demanding tasks is consistently effective.
What is the difference between ADHD-inattentive and ADHD-hyperactive types?
ADHD-inattentive (formerly ADD) presents primarily as difficulty focusing, forgetfulness, and disorganisation without hyperactivity. ADHD-hyperactive/impulsive presents as restlessness, interrupting, and difficulty waiting. Combined type (both) is most common. Inattentive type is more often missed in women and girls.
Why Attention Testing Matters
Attention is not one thing — it is a family of related processes: sustained attention (staying focused over time), selective attention (ignoring distractions), divided attention (multitasking), and executive attention (inhibiting impulses). ADHD primarily disrupts executive and sustained attention.
This FAQ covers the most searched questions about ADHD and attention — from diagnosis criteria and the CPT test to caffeine, exercise, and practical focus strategies.
Take the Attention & Focus test to see your sustained attention baseline, and the Number Memory test to measure working memory capacity.
ADHD vs Average Attention Scores
| Metric | Average | ADHD typical |
|---|---|---|
| CPT hit rate | 88–95% | 70–80% |
| Commission errors | 2–5% | 8–15% |
| Digit span (forward) | 7 digits | 5–6 digits |
| Reaction time variability | Low | High |
Test your sustained attention
Take the free Attention & Focus test — based on the clinical CPT used in ADHD evaluation. No sign-up needed.