How Does ADHD Affect Working Memory vs Intelligence?

PostedOctober 9, 2025

UpdatedOctober 13, 2025

ByMy Patient Advice

Author: Harriet Winslow, BSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

ADHD working memory is often impaired, which can affect cognitive function and the ability to complete tasks efficiently. While individuals with ADHD may have average or above-average intelligence, their working memory can hinder their ability to process and retain information in the short term. This discrepancy can lead to difficulties in remembering instructions, organising tasks, and following through on complex processes.

ADHD working memory deficits occur because the brain has trouble holding onto information long enough to use it effectively. This can make tasks such as multitasking or learning new information challenging, even though the person may have the intellectual capacity to grasp the material. On the other hand, intelligence remains intact, meaning that individuals with ADHD often have the potential to perform well academically or professionally once they overcome memory-related barriers.

Common Symptoms

Inattention

The difficulty with ADHD working memory often leads to struggles in focusing on long-term tasks, making it hard to retain or recall information over time. This can be especially noticeable in settings that require sustained attention.

Impulsivity

ADHD working memory issues can also cause impulsivity, as individuals may forget to think things through before acting. Despite this, their intelligence can help them solve problems quickly in certain situations.

Memory Deficits

Memory deficits are a key aspect of ADHD working memory struggles. Using external reminders, such as notes or digital tools, can help manage these challenges and support cognitive function.

While ADHD can impact working memory, individuals can still excel intellectually with the right strategies to support memory and attention.

Visit providers like ADHD Certify for personal consultations and expert advice tailored to your needs.   

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Myths about ADHD and intelligence.

Harriet Winslow, BSc

Author

Harriet Winslow is a clinical psychologist with a Bachelor’s in Clinical Psychology and extensive experience in behaviour therapy and developmental disorders. She has worked with children and adolescents with ADHD, autism spectrum disorder (ASD), learning disabilities, and behavioural challenges, providing individual and group therapy using evidence-based approaches such as CBT and DBT. Dr. Winslow has developed and implemented personalised treatment plans, conducted formal and informal assessments, and delivered crisis intervention for clients in need of urgent mental health care. Her expertise spans assessment, treatment planning, and behavioural intervention for both neurodevelopmental and mental health conditions.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy.

Dr. Rebecca Fernandez, MBBS

Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy.