Executive function covers planning, starting and finishing tasks, keeping things in mind and holding back impulses. Executive function and ADHD are linked, but one researcher argues it depends on how executive function is defined and measured: everyday ratings of adults with ADHD find problems in the vast majority, clinic tests find a clear problem in a minority.
What does executive function mean?
Executive function isn't one skill, and different studies split it into different parts.
Barkley (2011), a researcher writing an expert opinion piece rather than reporting a new study, points to two parts that clinic tests pick up most often in groups of people with ADHD: response inhibition (holding back an impulse) and working memory (holding a little information in mind and using it for a short time).
A study of employees with an average age in their mid twenties (Turjeman-Levi, 2024) used a self-report questionnaire. Two parts, managing time and getting organized to solve problems, did the most to explain the link it found between screening positive for ADHD and job burnout. A survey of adults (Stern, 2026) used a questionnaire that gives two executive function scores, one called metacognitive and one called behavioral regulation.
In this article, executive dysfunction just means trouble with these skills, what Barkley (2011) and Turjeman-Levi (2024) call executive function deficits. The term is handy, but it can make the problem sound like one fixed, measurable thing. Barkley (2011) argues it isn't. He notes that the idea of executive function is itself hard to pin down, and that earlier attempts to define it have run into real problems.
So when you read that someone has "executive function problems," it's worth asking two questions. Which skill is meant? And how was it measured? A clinic test and a questionnaire about daily life may give very different pictures.
Try this today: Pick one everyday task and note one thing around it, such as the time of day, the place or an interruption, that makes it easier or harder to finish.
How does ADHD affect executive function? It depends on the definition and the measure
Barkley (2011) argues that whether people with ADHD show weaker executive function depends on how it's defined and on the tool used to measure it. He didn't run a new study. He summarized earlier research on adults with ADHD and on children with ADHD followed into adulthood, alongside research on people with brain injuries.
When people with ADHD are compared as a group with people without it, they do worse on average on executive function tests, especially response inhibition and working memory. But looked at one person at a time, only a minority, 35 to 50%, show a clinically significant problem on those tests.
Rating scales tell a different story. These are questionnaires about how someone manages in everyday life. When adults with ADHD, or children with ADHD followed into adulthood, are rated this way, the vast majority show executive function difficulties.
Across studies of people with ADHD and of people with brain injuries or other conditions, a single clinic test had little in common with ratings of executive function, and even the best combination of tests overlapped with those ratings only modestly. In studies that watched people with injuries to the front of the brain doing real daily tasks, tests may explain only a small part of their rated difficulties, mostly at work.
Barkley judges ratings to be the more valid measure. On that basis he concludes that ADHD clearly involves executive function problems as ratings measure them, and that test results alone can't show executive function is uninvolved. He suggests that rating scales, structured interviews or direct observation be considered in addition to or instead of tests when executive function is evaluated.
This is one researcher's argued position, not a settled finding. It means executive dysfunction in ADHD isn't one measured thing with one answer. On his argument, a person could do fine on a test and still be rated as having executive function difficulties.
Executive function in adult daily life: work and home
Studies of adults have also looked at how executive function connects ADHD to everyday life. The studies below each relied on questionnaires and looked for links, so they can't show what causes what.
One study looked at 171 employees recruited online, with an average age in their mid twenties (Turjeman-Levi, 2024). The groups came from a screening questionnaire for ADHD symptoms, not a diagnosis. Employees who screened positive reported clearly more job burnout and clearly greater executive function difficulties than those who didn't. Executive function difficulties appeared to explain much of the link between screening positive and burnout, with managing time and organizing to solve problems standing out most. The authors note the sample was modest, everything was self-reported, and they didn't account for anxiety or depression.
Another surveyed 164 adults in Israel, most of them women, recruited through social media (Stern, 2026). People in the ADHD group reported a formal diagnosis from a health professional. Adults with ADHD felt less confident about preparing food than adults without it, though the study found no clear difference on the other parts of the cooking measure. More ADHD symptoms went with poorer executive function on both scores. Through the metacognitive score, symptoms were linked most clearly to cooking confidence and attitudes, and through the behavioral regulation score to physical and psychological quality of life. The authors call these links exploratory.
For what helps, see What helps ADHD focus? What the research found, or browse the focus cognitive section.
These findings describe groups, mostly through self-report. Barkley's case that ratings capture executive function better than tests is one researcher's view, and the question isn't settled. Nothing here can tell whether any one person has ADHD. Only a clinician can diagnose it.