Executive function is less well-known than intelligence as a predictor of outcomes, but in some respects it is more important. A child with high IQ and poor executive function will struggle to deploy what they know. A child with average IQ and strong executive function will use their resources efficiently. The question of how to support executive function development in the early and middle childhood years – when it is most plastic and most responsive to experience – is one of the most practically useful questions in child development.
The answer involves less direct instruction than parents might expect. Play – complex, rule-governed, self-directed play – is one of the most reliable drivers of executive function development in early childhood. Physical activity, music, and structured EF training programmes also have evidence behind them. And understanding what EF looks like at different ages allows parents to have realistic expectations for what their child can regulate.
Healthbooq (healthbooq.com) covers child development and cognitive skills.
The Three Core Executive Functions
Adele Diamond, a cognitive neuroscientist at the University of British Columbia who has conducted some of the most influential research on EF development, describes three core executive functions that underlie all higher-order cognitive control:
Working memory: the ability to hold information in mind and mentally work with it. When a child listens to multi-step instructions and carries them out, they are using working memory. When a child keeps track of a score while playing a game, or holds the beginning of a sentence in mind while processing the end, they are using working memory. Working memory limitations directly affect reading comprehension, maths performance, and the ability to follow complex classroom instructions.
Inhibitory control: the ability to suppress an automatic, prepotent response in order to do what is actually appropriate. Waiting for a turn, stopping talking when the teacher asks for quiet, not grabbing something they want, resisting the temptation to blurt out an answer – all involve inhibitory control. The marshmallow test (Mischel's classic paradigm at Stanford) measures a specific form of inhibitory control (delay of gratification) and has been associated with long-term outcomes, though subsequent studies have found that socioeconomic context moderates these associations considerably.
Cognitive flexibility: the ability to shift mental set – to see things from different perspectives, to switch between tasks, to adapt when the rules change. A child who becomes rigid and distressed when a routine is altered, or who cannot see that there are multiple ways to solve a problem, has limited cognitive flexibility. This skill supports creative thinking, social problem-solving, and academic adaptation.
How Executive Function Develops
EF develops substantially between ages 3 and 12, with rapid growth in the preschool period (3-5 years) and continued development through middle childhood and adolescence. The prefrontal cortex (the primary neural substrate for EF) does not reach full maturity until the mid-20s.
At age 3, children can follow simple rules ("don't touch") but have very limited inhibitory control and working memory. Between ages 4 and 6, there is rapid improvement in all three core EFs. Between 7 and 12, gains continue but are more gradual.
Gender differences emerge around age 3: girls typically show faster EF development than boys in the preschool years, which is one reason they are generally more ready for formal schooling. This gap narrows through middle childhood.
What Supports Executive Function Development
Pretend play: complex pretend play requires children to hold a dual identity (the child is both themselves and the character), follow implicit rules of the narrative, and suppress out-of-character responses. Dramatic play, role play, and play involving characters and rules are among the strongest environmental promoters of EF in early childhood. Adele Diamond and research groups including that of Laura Berk at Illinois State University have found consistent associations.
Physical activity: aerobic exercise has direct effects on prefrontal cortex function and EF performance. Charles Hillman's work at the University of Illinois found that a single session of aerobic exercise improves working memory and inhibitory control in school-age children. Schools that reduce physical activity time to increase academic instruction may be undermining the very cognitive functions academic learning requires.
Music: structured music training (particularly learning an instrument) has been associated with improvements in working memory and cognitive flexibility. The Harmony programme and similar school-based music interventions have found improvements in EF in randomised trials.
Specific EF programmes: Tools of the Mind (Bodrova and Leong), a preschool curriculum grounded in Vygotskian principles that uses pretend play and scaffolded activities specifically designed to develop EF, has shown significant EF and academic gains compared to standard curricula in multiple randomised controlled trials.
EF Difficulties
Executive function difficulties are a core feature of ADHD (primarily inhibitory control and working memory). They are also common in autism (particularly cognitive flexibility and planning difficulties), Developmental Language Disorder, dyslexia, and following brain injury. Children with significant EF impairments benefit from external supports: visual schedules (supporting working memory), clear and consistent routines (reducing the need for cognitive flexibility), and reduced concurrent demands (reducing working memory load).
Key Takeaways
Executive function (EF) refers to the set of cognitive control processes managed primarily by the prefrontal cortex that allow people to regulate their thinking and behaviour. The three core EF skills are working memory (holding information in mind while using it), inhibitory control (suppressing automatic responses to act deliberately), and cognitive flexibility (shifting attention and adapting to new rules). Executive function develops substantially between ages 3 and 12, with the prefrontal cortex among the last brain regions to mature (continuing into the mid-20s). Research by Adele Diamond at the University of British Columbia has shown that EF skills are stronger predictors of school readiness than IQ, and that they can be meaningfully improved through play, physical activity, and specific EF training. Conditions such as ADHD, DLD, and autism commonly involve significant EF impairments.
