Interest based Attention

ADHD is now understood as an Executive Functioning and Self-Regulation Disorder rather than simply a problem with attention.

It is differences in how multiple brain networks communicate and coordinate with one another.

These differences involve:

• Dopamine and noradrenaline neurotransmitter systems
• Executive control networks
• Reward and motivation networks
• Timing and self-regulation networks

ADHD affects the ability to regulate:

• behaviour
• attention
• emotions
• motivation
• time

Adults with ADHD often struggle to:

• Begin tasks that are not interesting
• Persist with repetitive activities
• Work toward long-term goals
• Maintain effort without immediate feedback

Behaviour is driven by :

• Interest
• Novelty
• Urgency
• Reward
• Instant gratification 
• Fear of negative consequences 

Rather than by:

• Importance
• Long-term consequences
• Deadlines that are still far away

Dopamine and Motivation

dysregulation of dopaminergic neurotransmission, rather than a simple dopamine shortage.

Dopamine helps regulate:

• Motivation
• Reward processing
• Attention
• Task initiation
• Effort allocation
• Goal-directed behaviour

ADHD Brains Operate on a Different Reward System

Individuals with ADHD often require greater stimulation before reward systems become fully engaged.

As a result:

• Novelty captures attention more easily
• Urgency increases motivation
• Immediate rewards feel more compelling
• Repetitive tasks feel painful 

This is not a failure of motivation.

It reflects differences in how reward and motivation networks respond to stimulation.

Less responsive to delayed rewards
As a result:

• Immediate rewards feel more motivating than future rewards
• Urgency activates motivation more effectively than importance
• Boring or repetitive tasks can feel extremely difficult to start
• Motivation may disappear quickly when interest fades

Reward Prediction Difficulties

The ADHD brain often has difficulty assigning value to rewards that are distant in time.

This can contribute to:

• Procrastination
• Difficulty initiating boring tasks
• Interest-based attention
• Reliance on urgency or novelty
• Rapid loss of motivation
• Difficulty maintaining effort toward long-term goals

Dopamine is a neurotransmitter (chemical messenger) that allows brain cells to communicate with other cells. 

Dopamine is not simply a “pleasure chemical.” 

Dopamine and Noradrenaline Signalling

• Not a simple dopamine deficiency.
• Less efficient dopamine signalling
• Less consistent dopamine release

Dopamine helps the brain:

• decide what is important 
• decide what to pay attention to
• decide what is worth acting upon.
• anticipate rewards
• allocate effort
• sustain motivation toward future goals

Dopamine is triggered by:

• Novel experiences
• Rewards
• Anticipation of reward
• Interest
• Curiosity
• Urgency
• Achievement

Dopamine regulates

• Motivation
• Attention
• Reward processing
• Learning
• Task initiation
• Decision-making
• Movement
• Working memory
• Salience detection (determining what is important)

When dopamine signalling is dysregulated: 

• delayed rewards lose motivational power 
• feels harder to initiate and persist with tasks that are important but not immediately rewarding. 

The ability to use time to regulate behaviour toward future goals.

Functional Skills Involved

Self-management to time supports the ability to:

• Sense the passage of time
• Estimate how long tasks will take
• Plan for future events
• Prioritise activities
• Meet deadlines
• Persist toward delayed goals
• Use time to guide behaviour toward future consequences

When Impaired

Difficulties in self-management to time can lead to problems organising behaviour around future goals, deadlines, and responsibilities.

Common difficulties include:

• Time blindness
• Chronic lateness
• Procrastination
• Poor scheduling
• Poor prioritisation
• Last-minute task completion
• Difficulty delaying gratification
• Reduced future-oriented thinking
• Being overly focused on the immediate moment

Functional Consequences

This may result in:

• Rushing tasks and making careless mistakes
• Leaving tasks until the last minute
• Underestimating how long tasks will take
• Difficulty sustaining effort for lengthy tasks
• Poor planning of multi-step activities
• Not following through on instructions
• Failing to finish tasks
• Missing appointments
• Forgetting deadlines
• Forgetting future intentions
• Struggling to organise behaviour around long-term responsibilities

Underlying Executive Function Difficulties

These difficulties are commonly associated with:

• Poor behavioural inhibition
• Deficient working memory
• Impaired foresight
• Reduced future-oriented thinking
• Difficulty delaying gratification

Many people with ADHD find that background sound actually improves focus—

and there are solid neuroscience reasons why.

The ADHD brain is under-stimulated

ADHD is linked to lower activity in brain networks responsible for attention, especially involving dopamine and norepinephrine.

• The brain seeks stimulation to reach an optimal alert state.
• Silence can feel like not enough input, causing the mind to wander.
• Background sound provides just enough stimulation to “wake up” attention systems.

This is sometimes called optimal stimulation theory.

Sound increases dopamine

Certain sounds (music, white noise, rhythmic beats) can:

• Boost dopamine release
• Improve motivation and task engagement
• Reduce the urge to seek stimulation elsewhere (e.g., phone scrolling)

ADHD brains often chase stimulation — sound supplies it safely.

It masks distracting thoughts

Without external sound:

• Internal noise (thoughts, worries, daydreaming) becomes louder
• ADHD involves difficulty filtering irrelevant thoughts

Background noise acts like a mental noise-canceller, giving the brain something steady to latch onto.

 Rhythm helps regulate attention

Steady beats or predictable sound patterns can:

• Synchronize brain activity
• Support working memory
• Improve sustained attention

This is why many people with ADHD prefer:

• Instrumental music
• Lo-fi beats
• Brown noise
• Rain sounds

Lyrics can be distracting because they compete with language processing.

 It reduces boredom (which shuts down focus)

ADHD attention is interest-based, not importance-based.

If a task is:

• Repetitive
• Slow
• Not stimulating

→ The brain disengages.

Sound adds stimulation so the task becomes tolerable.

Think of the ADHD brain like a car idling too low.

• Silence = engine stalls
• Background sound = gentle accelerator

Working Memory

• Working memory is the brain’s ability to hold information in mind and use it over short periods of time. 
• It acts like a mental workspace that helps us follow instructions, complete tasks, and keep track of what we are doing.

How Dopamine Affects Working Memory

• Helps the prefrontal cortex maintain information “online.”  
• In ADHD, less efficient dopamine signalling can make information fade more quickly, resulting in forgetfulness, distractibility, and difficulty completing complex tasks.

In ADHD:

• Information is more easily lost from conscious awareness.
• Difficulty holding multiple pieces of information in mind at once.
• Forgetting what you were about to say or do.
• Losing track of tasks after interruptions.
• Difficulty following multi-step instructions.
• Frequently misplacing items and forgetting appointments.
• Increased reliance on reminders, notes, and external prompts.

Brain Regions Involved:

• Prefrontal Cortex (PFC) – temporarily stores and manipulates information.
• Frontostriatal Networks – support attention and task maintenance.
• Dopamine Pathways – help keep information active and available in working memory.

Rejection sensitivity (often termed Rejection Sensitivity Dysphoria, RSD) is 

A pattern of intense emotional pain and rapid mood shifts

Triggered  by perceived or actual rejection, criticism, or failure. 

Test for Rejection Sensitivity

• Rejection sensitive dysphoria (RSD) is an intense vulnerability to the perception — not necessarily the reality — of being rejected, teased, or criticised by important people in your life.    

• The response is well beyond all proportion to the nature of the event that triggered it.

• Rejection sensitive dysphoria is not a formal diagnosis, but rather one of the most common and disruptive manifestations of emotional dysregulation a  but under-researched and oft-misunderstood symptom of ADHD, particularly in adults.

• RSD is a brain-based symptom that is likely an innate feature of ADHD.

• Often, this intense emotional reaction is hidden from other people. People experiencing  it don’t want to talk about it because of the shame they feel over their lack control, or because they don’t want people to know about this intense vulnerability.

• RSD causes extreme emotional pain that may also be triggered by a sense of failure, or falling short — failing to meet either your own high standards or others’ expectation.

• Dysphoria is the Greek word meaning unbearable; its use emphasizes the severe physical and emotional pain suffered by people with RSD when they encounter real or perceived rejection, criticism, or teasing. 

What RSD looks like 

• A Disproportionate emotional response (e.g., shame, sadness, anger) to minor criticism or neutral feedback

• A Rapid onset and intensity, often described as overwhelming or unbearable

• A Threat-based interpretation of social cues (e.g., assuming disapproval or abandonment)

• Behavioural consequences: avoidance, people-pleasing, withdrawal, rumination, or sudden anger

Why it occurs in ADHD

• Emotion regulation deficits: ADHD involves reduced top-down modulation from prefrontal networks, limiting the ability to dampen emotional responses once triggered.

• Heightened limbic reactivity: Increased sensitivity of threat-detection systems (e.g., amygdala) amplifies perceived social threat.

• Learning history: Repeated experiences of criticism, failure, or misunderstanding (especially in undiagnosed ADHD) condition strong emotional responses to feedback.

• Dopaminergic vulnerability: Fluctuations in reward and motivation systems increase sensitivity to social evaluation.