Understanding Neurodiversity: Demystifying Autism, ADHD & AuDHD Across the Lifespan

by Patricia Lundgren, LCSW

April is Autism Awareness month, a designation that invites us to reflect on the differing ways in which individuals present to the world. In recent years, the concept of neurodiversity has gained traction in both clinical spaces and in public discourse. Neurodiversity reframes neurological differences, not as deficits to be “fixed,” but as natural variations in how human brains develop, process, and engage with the world. This perspective invites us to move away from deficit-based models and toward a more compassionate and layered understanding of conditions such as autism and ADHD. It also helps illuminate the growing recognition of individuals who identify with both, often referred to as AuDHD.

What Is Neurodiversity?

Neurodiversity is the idea that there is no single “correct” way for a brain to function. Within this framework, conditions like autism and ADHD are not inherently pathological. Instead, they reflect differences in:

  • Sensory processing
  • Attention and executive functioning
  • Social communication styles
  • Emotional regulation

The neurodiversity perspective also emphasizes that the difficulties individuals face often arise from a mismatch between an individual’s needs and their environment, and not from a deficit within the individual themselves.

Demystifying Autism

Autism exists on a spectrum, presenting differently from person to person, and ranging from mild to severe. Due to the differences in presentation, Autism is frequently misunderstood. However, across the spectrum Autism involves differences in: 

  • Social communication and interaction (taking things literally, taking longer to process information, avoiding eye contact)
  • Sensory processing (hypersensitivity, hyposensitivity)
  • Routines and interests (need for consistency and familiarity, deep focus on certain topics/perseveration)

A common misconception is that Autistic people have a lack of empathy, however many autistic individuals feel emotions deeply, they just express or interpret them differently. 

In children Autism often presents as: 

  • Preferring solitary or parallel play
  • Having specific, intense interests
  • Showing sensitivity to noise, textures, or changes in routine
  • Communicating in ways that differ from peers

In adults, symptoms can become more subtle and appear as: 

  • Experiencing social exhaustion or burnout
  • Relying heavily on routines to manage daily life
  • Struggling with sensory overload in environments like offices or public spaces
  • Feeling “out of sync” socially despite strong self-awareness

Understanding ADHD

Attention-Deficit/Hyperactivity Disorder (ADHD) is often oversimplified as “trouble paying attention,” but it is more accurately a difference in regulation of attention, rather than a deficit. ADHD can involve:

  • Difficulty sustaining attention on tasks that are not intrinsically engaging
  • Hyperfocus on highly stimulating or interesting activities
  • Impulsivity or challenges with inhibition
  • Differences in executive functioning (planning, organization, time management)

ADHD brains are often highly responsive to interest, urgency, novelty, and reward. This can make traditional structures, like classrooms or rigid work environments, particularly challenging.

Children with ADHD may: 

  • Struggle to sit still or follow instructions
  • Interrupt frequently or act impulsively
  • Have difficulty completing tasks
  • Appear “daydreamy” or inattentive

Adults with ADHD may:

  • Struggle with time management, deadlines, or organization
  • Experience cycles of burnout and hyperproductivity
  • Have difficulty maintaining routines
  • Feel chronically overwhelmed

What Is AuDHD?

AuDHD is an informal term used to describe individuals who are both autistic and have ADHD. While not a formal diagnostic category, it reflects a lived experience that is increasingly recognized in clinical practice. Autism and ADHD share several features, which can sometimes make differentiation complex:

  • Executive functioning challenges (e.g., organization, task initiation)
  • Sensory sensitivities
  • Emotional regulation differences
  • Social difficulties (though often for different underlying reasons)

Because of this overlap, individuals may be misdiagnosed, underdiagnosed, or diagnosed later in life, especially if they have learned to mask or compensate.

The combination can create a unique internal dynamic. For example:

  • A need for routine (autism) alongside a craving for novelty (ADHD)
  • Deep focus (autism) paired with distractibility (ADHD)
  • Sensory sensitivities that are intensified by impulsivity or restlessness

Many individuals with AuDHD describe feeling pulled in opposite directions, seeking both structure and spontaneity at the same time.

Children with AuDHD may show a mix of these traits, sometimes in ways that seem contradictory, such as needing strict routines but also resisting them, leading to behaviors being interpreted as noncompliant or disruptive. .

Many adults have spent years developing coping strategies, consciously or unconsciously masking their differences. Adults with AuDHD often report a lifelong sense of inconsistency or contradiction, difficulty understanding why certain strategies work sometimes but not others, and high levels of masking, often leading to burnout. 

How We Can Help

When we view autism, ADHD, and AuDHD through a neurodiversity lens, we begin to recognize:

  • Strengths alongside challenges
  • Context alongside behavior
  • Identity alongside diagnosis

Utilizing a neurodiversity lens creates space for more effective support, support that is collaborative, individualized, and respectful. If you are unsure how to support yourself or your child a comprehensive neuropsychiatric evaluation can help. Neuropsych evals can tease out the overlap between diagnoses and help create and identify treatments tailored to each individual’s needs and experiences. 

If this resonates with you, or if you’re noticing these patterns in your child, support is available. At Evolve Psychological Services, we work with children, teens, and adults across New Jersey, New York, and PsyPact states. We offer:

If you’re unsure where to start, we’re happy to help guide you. Call or text (973) 891-0793 or reach out through our website to take the next step.

And if you know someone who may benefit from this information, we welcome you to share this resource with them.