Understanding Executive Functions
By Ria Pole, Neuroscience student University of Lethbridge
Many of the challenges we experience in everyday life, like losing focus while studying, reacting impulsively, forgetting plans, or struggling to adapt when things change, are connected to a set of mental skills known as executive functions.
Executive functions (EFs) are a set of top-down cognitive processes that help us regulate our thoughts, emotions, and behavior (Diamond, 2013). In simple terms, they allow us to use our knowledge, experiences, and goals to guide our actions, especially when automatic responses are not enough. These processes are primarily managed by the prefrontal cortex (Miller & Cohen, 2001). They are essential for sustaining attention, adapting to change, and working toward long-term goals.
The Three Core Executive Functions
There are three core executive functions:
1. Inhibitory Control
Inhibitory control is the ability to regulate attention, behavior, thoughts, and emotions. It allows individuals to pause, think and choose their response instead of overriding impulses, distractions, and strong emotions.
In daily life, this looks like:
A child waiting for their turn instead of grabbing a toy.
An adult choosing not to send an angry email immediately.
A student resisting the urge to check their phone while studying.
Someone sticking to a healthy eating plan despite cravings.
It includes:
Response inhibition (Self-control): resisting temptations and impulsive actions
Interference control: Selective attention and ignoring irrelevant or distracting thoughts
Cognitive inhibition: suppressing intrusive thoughts or irrelevant memories learned earlier that interfere with current goals.
Longitudinal research shows that children with stronger inhibitory control early in life are more likely to:
Stay in school
Avoid risky behaviors
Maintain better physical and mental health
Earn more as adults
Report higher life satisfaction
(Moffitt et al., 2011)
Sometimes, even taking a brief pause before reacting can prevent impulsive mistakes.
2. Working Memory
Working memory is the ability to hold information in mind while simultaneously working with it. It is different from short-term memory, which only stores information, while working memory allows us to manipulate it.
It plays a key role in creativity, reasoning, learning, and problem-solving, and relies heavily on the dorsolateral prefrontal cortex (Baddeley, 2012).
Working memory supports:
Mental math
Planning and updating goals
Integrating new information
Logical reasoning
Creative recombination of ideas
Examples in daily life:
Doing math in your head.
Following multi-step instructions.
Remembering what someone just said while formulating your reply.
Updating plans when something changes.
3. Cognitive Flexibility
Cognitive flexibility allows individuals to shift between tasks, perspectives, or rules, and to adapt behaviors to changing environments or new information. It builds on inhibitory control and working memory. It supports thinking “outside the box”, correcting errors, and multitasking.
It includes:
Perspective shifting (spatial and interpersonal)
Task switching
Set shifting
Generating alternative solutions
In daily life, this looks like:
A child switching from playtime to homework without a meltdown.
A parent adapting to dinner plans when an ingredient is missing.
An employee adjusting to a new manager’s expectations.
Seeing a disagreement from another person’s point of view.
Flexibility requires turning off one mental set and activating another, which is cognitively demanding. Therefore, it develops later in childhood than the other core executive functions and declines in older adulthood (Diamond, 2013). It is strongly associated with creativity and adaptive functioning.
Executive Functions Predict Life Outcomes
Executive functions predict outcomes across multiple domains:
Mental health: difficulties are linked to conditions like ADHD, depression, schizophrenia, OCD, and addictions.
Physical health: affects habits like sleep, diet and self-care.
Academic achievement: more predictive than IQ.
Career success: associated with productivity and job retention.
Social relationships: influence marital harmony and peer functioning; support communication and emotional regulation.
Public safety: influence impulse control and law-abiding behavior.
Longitudinal studies show that executive functions often predict long-term achievement, wealth, health, and quality of life more strongly than IQ or socioeconomic status (Moffitt et al., 2011; Diamond, 2013).
Biological and Environmental Influences on Executive Functions
Executive functioning isn’t fixed. It changes depending on what’s happening in your body and environment. It is often the first system to be affected by stress.
Executive functions are impaired by:
Stress
Poor sleep
Low mood
Loneliness or social exclusion
Illness
Poor physical health
This is why:
After a bad night’s sleep, focusing feels harder
During stressful weeks, reactions feel stronger
When feeling rejected, thinking becomes less clear
Executive functions rely on balanced neurochemicals like dopamine, norepinephrine and cortisol. When this balance is disrupted by stress, fatigue, or illness, skills like focus, self-control, and flexibility are affected (Arnsten, 2009).
Sleep deprivation also reduces prefrontal efficiency, making it harder to pay attention, planning, and regulate behavior (Killgore, 2010). Depressed mood and social exclusion consume cognitive resources and reduce motivation, limiting executive performance (Baumeister et al., 2005). Even brief experiences of rejection can impair reasoning and self-control.
Infection provides another example of executive vulnerability. Evidence suggests that the cognitive impairment, “mental fog” we experience when we are sick is largely driven by immune activation rather than the infection itself (Dantzer et al., 2008). Inflammatory processes temporarily affect prefrontal functioning, leading to mental fog, irritability, and reduced flexibility. Executive functions are often the first cognitive system to decline during physiological stress because they rely on evolutionarily recent and complex neural circuits.
Executive performance is also shaped by experience. For example, managing two languages requires constant monitoring and switching. Bilingual exposure has been associated with accelerated development of certain executive processes in childhood and relative preservation of executive functioning in aging. However, these effects are most consistently seen in processing speed and cognitive flexibility rather than across all executive skills, meaning bilingualism is better understood as a contributor rather than a universal advantage (Bialystok, 2017).
Beliefs also play a powerful role. Research on self-efficacy and growth mindset shows that individuals who believe their abilities can improve are more likely to persist in challenging tasks. These beliefs directly influence engagement and long-term growth as executive functions develop through sustained and progressively difficult practice (Bandura, 1997; Dweck, 2006).
Overall, fluctuations in executive functioning often reflect temporary biological, environmental, and psychological conditions rather than permanent cognitive deficits. It is essential to understand this sensitivity for distinguishing situational impairment from disorder and for creating conditions that support optimal executive performance.
Can Executive Functions Be Improved?
Executive functions can be improved at all ages, though improvement requires consistent and gradually increasing challenge(Diamond & Ling, 2016).
Evidence supports improvements from:
Working memory training programs
Martial arts and structured activities
Task-switching exercises
Mindfulness practices
Aerobic exercise (especially when cognitively engaging)
Bilingual exposure (particularly for processing speed)
However,
Improvements are often specific to what is practiced
Progress requires repetition and gradual challenge
Programs without increasing difficulty show limited results.
An Integrated Model for Families
Executive functions do not improve through cognitive training alone.
They improve most when:
Stress is manageable.
Emotional safety is present.
Social belonging is strong.
Sleep is sufficient.
Physical health is supported.
Activities are meaningful and engaging.
If a child is overwhelmed, lonely, sleep-deprived, or chronically stressed, even the best training strategies will have limited impact.
Practical Strategies for Strengthening Executive Functions for Everyday Life
1. Externalize Working Memory
When working memory is overloaded, organization suffers.
Reduce mental load by:
Using to-do lists.
Maintain a visible calendar.
Set phone reminders.
Keep one consistent notebook for important information.
2. Build Predictable Routines
Routine reduces the need for constant executive decision-making as daily sequences become structured. Thus, this cognitive energy can be reserved for novel tasks.
Examples:
Fixed morning routines.
Designated places for keys and important documents.
Scheduled study or work blocks.
Predictability also strengthens planning and reduces impulsive errors.
3. Break Complex Tasks into Steps
Large tasks overwhelm the brain.
Instead of writing a report,
Break it into:
Outline headings.
Draft introduction.
Write section one.
Edit.
4. Modify the Environment
Executive functions are highly sensitive to distraction.
Change your environment by:
Reducing visual clutter.
Minimizing background noise.
Turning off phone notifications.
Creating a focused workspace.
Changing the environment often works better than relying purely on willpower.
5. Combine Cognitive with Physical and Emotional Support
Executive function training is most effective when combined with:
Adequate sleep
Physical activity
Emotional safety
Social connectedness
Meaningful engagement
Training alone produces limited gains without reducing stress or addressing emotional needs.
Final Thought
Executive functions are not just cognitive skills. They are shaped by biology, environment, emotions, and beliefs. This means that struggles with focus, self-control, or flexibility are not simply personal failures, but they are often signals that something in the system needs support.
Improving executive functioning is not about pushing harder. It’s about building the right conditions for the brain to function at its best.
Building Brains Together research focus is building and strengthening executive functioning throughout the lifespan through playful activities, education, and evidence-based research. Visit www.buildingbrains.ca to access BBTs free executive function curricula and courses.
References:
Diamond A. (2013). Executive functions. Annual review of psychology, 64, 135–168. https://doi.org/10.1146/annurev-psych-113011-143750
Diamond, A., & Ling, D. S. (2016). Conclusions about interventions, programs, and approaches for improving executive functions that appear justified and those that, despite much hype, do not. Developmental cognitive neuroscience, 18, 34–48. https://doi.org/10.1016/j.dcn.2015.11.005
Arnsten A. F. (2009). Stress signalling pathways that impair prefrontal cortex structure and function. Nature reviews. Neuroscience, 10(6), 410–422. https://doi.org/10.1038/nrn2648
Baddeley A. (2012). Working memory: theories, models, and controversies. Annual review of psychology, 63, 1–29. https://doi.org/10.1146/annurev-psych-120710-100422
Bandura, A. (1997). Self-efficacy: The exercise of control. W.H. Freeman.
Baumeister, R. F., DeWall, C. N., Ciarocco, N. J., & Twenge, J. M. (2005). Social exclusion impairs self-regulation. Journal of personality and social psychology, 88(4), 589–604. https://doi.org/10.1037/0022-3514.88.4.589
Bialystok E. (2017). The bilingual adaptation: How minds accommodate experience. Psychological bulletin, 143(3), 233–262. https://doi.org/10.1037/bul0000099
Dantzer, R., O'Connor, J. C., Freund, G. G., Johnson, R. W., & Kelley, K. W. (2008). From inflammation to sickness and depression: when the immune system subjugates the brain. Nature reviews. Neuroscience, 9(1), 46–56. https://doi.org/10.1038/nrn2297
Dweck, C. S. (2006). Mindset: The new psychology of success. Random House.
Killgore W. D. (2010). Effects of sleep deprivation on cognition. Progress in brain research, 185, 105–129. https://doi.org/10.1016/B978-0-444-53702-7.00007-5
Miller, E. K., & Cohen, J. D. (2001). An integrative theory of prefrontal cortex function. Annual review of neuroscience, 24, 167–202. https://doi.org/10.1146/annurev.neuro.24.1.167
Moffitt, T. E., Arseneault, L., Belsky, D., Dickson, N., Hancox, R. J., Harrington, H., Houts, R., Poulton, R., Roberts, B. W., Ross, S., Sears, M. R., Thomson, W. M., & Caspi, A. (2011). A gradient of childhood self-control predicts health, wealth, and public safety. Proceedings of the National Academy of Sciences of the United States of America, 108(7), 2693–2698. https://doi.org/10.1073/pnas.1010076108
Alberta Family Wellness (photo) https://www.albertafamilywellness.org/what-we-know/the-brain-story/