HOW AUTISM AND ADHD CONCEAL ONE ANOTHER IN LATE-IDENTIFIED, HIGHLY MASKED ADULTS

INTRODUCTION: THE DIAGNOSTIC PARADOX

Written by: Raven LeFebvre, LCSW, LCSW-C, LICSW, MAC,

Owner and Founder, Silhouette Psychotherapy

​​© 2024-2026 Raven LeFebvre. All rights reserved.

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One of the hardest parts of the late identified/suspected neurodivergent adult experience is when academic, social, and/or professional success contributes to the concealment of daily lived experience that indicate a complex neurodevelopmental presentation that has likely remained unrecognized throughout life. Autism and ADHD can frequently mask one another in late-identified, highly masked adults. This diagnostic overshadowing occurs bidirectionally. When one neurodevelopmental profile (Autism or ADHD) is visible or identified, the other (Autism or ADHD) is at higher risk of remaining obscured. For women and AFAB adults in particular—who are socialized toward masking, who present with internalized rather than externalized symptoms, and who often compensate through high intelligence and structured environments—this dual concealment can persist for decades.

For many highly compensated adults, this creates a particularly confusing experience.

A person may have spent years being academically successful, professionally accomplished, or outwardly functional, while simultaneously experiencing sensory overwhelm, executive-function difficulties, chronic effort, emotional/behavioral dysregulation, exhaustion, or a sense that everyday demands require far more energy than they seem to require for other people. When outward achievement is used as evidence that someone could not possibly be struggling, the underlying neurodevelopmental presentation can remain hidden even from the person themselves.

If you have spent years wondering how you can accomplish extraordinarily difficult things while struggling with seemingly simple ones, this distinction may be worth exploring. At Silhouette Psychotherapy, we work with adults whose navigation of outer world arenas can sometimes obscure the amount of effort required to maintain their observable "functioning" level. Understanding the difference between functioning and the cost of functioning can be an important part of understanding whether autism, ADHD, or both may be contributing to your experience.

THE ARCHITECTURE OF MASKING: HOW COMPENSATION OBSCURES BOTH CONDITIONS IN LATE-IDENTIFIED, HIGHLY MASKED ADULTS

Functional Success as a Masking Mechanism

Functional success is itself a form of masking. Research on late-identified autistic and ADHD adults consistently identifies a pattern: cognitive resources sufficient to compensate for neurodevelopmental differences throughout childhood, often is the thing that also allows Autism/ADHD/AuDHD to remain unrecognized on surface measures and by the external gaze. Intelligence, capacity for sustained focus on intrinsically motivated tasks, and ability to meet external expectations may each have functioned function as compensatory mechanisms that obscured underlying neurodevelopmental profiles for decades.

How this works:

For autism: What the neuromajority defines as “restricted interests” (in DSM speak) may be channeled into socially acceptable activities. Sensory sensitivities may be managed through environmental control and avoidance. Social withdrawal may be reframed as introversion or preference for solitude. Difficulty with transitions may be attributed to stubbornness or personality.

For ADHD: Selective attention difficulties may be invisible because they are offset by demonstrations of exceptional focus on preferred tasks. Executive function challenges with non-preferred tasks may be attributed to lack of interest rather than neurodivergent traits.

The result: Neither condition is recognized because both were successfully compensated for through intelligence, structured environments, and conscious effort.

For a highly internalized and compensated neurodivergent adult, this can mean that the most visible part of the story is the achievement rather than the effort required to produce it. A person may have developed sophisticated systems, relied heavily on structure, chosen environments that naturally accommodate their needs, or learned to exert extraordinary effort in order to meet external expectations. Over time, these compensatory strategies can become so embedded in daily life that they are mistaken for evidence that there was never an underlying difficulty in the first place.

A useful question, therefore, may not simply be whether someone can function, but what it takes for them to function. If maintaining academic, professional, household, or relational responsibilities requires chronic over-preparation, avoidance, environmental control, intense effort, or significant recovery afterward, those experiences may be clinically meaningful. This is one reason comprehensive assessment can be particularly valuable for adults whose outward functioning has historically concealed their internal experience.

THE FEMALE / AFAB PHENOTYPE AND GENDERED MASKING

Research consistently demonstrates that autistic females are diagnosed later than males, with the majority receiving diagnosis in adulthood. For ADHD, analogous patterns apply. Female socialization intensifies masking capacity in specific ways:

Social Pressure to Conform:

It is the centerpiece of many neurodivergent childhoods that parents may apply direct or indirect pressure to suppress one’s natural preference for solitary, focused activity.

Parents may express direct or indirect frustration when one prioritizes an interest over socializing—communicating that such interests were inappropriate or excessive.

Parents may directly or indirectly enforce compliance—teaching one to override their own sensory and physiological responses in childhood, for social obligation. Often since neurodivergence runs in families, (without going too deeply into intergenerational transmission patterns of relational trauma here), these parents are simply re-enacting the ways that they learned to interact with their own internal realities and needs.

Over time, these experiences can teach a person that their natural preferences, sensory responses, emotional reactions, or ways of engaging with the world need to be modified in order to remain acceptable to others. What begins as conscious adaptation can eventually become automatic masking. The adult may become extremely skilled at anticipating expectations, modifying their behavior, and suppressing signs of distress, while losing awareness of how much effort this process requires.

The “Almost Functional” Presentation:

While by no means is this the case for everybody, many late identified autistic, ADHD, AuDHD adults may, for some part of their adult lives, maintain employment and relationships, participate in structured social activities, manage household responsibilities, albeit imperfectly and with conflict (internal and/or external), and integrate their interests into their environment and social life.

This near-functionality is precisely what allows late identification. The clinician, family, and even the client themselves, were they to look for autism or ADHD, would see someone who "functions fine" and misses the internal experience of chronic effort, dysregulation, and exhaustion.

This is one of the reasons late identification can be so complicated. The person may not present as someone who is obviously struggling from the outside. They may have built a life that works—at least to some degree—around their neurodevelopmental needs. They may have chosen highly structured environments, developed extensive compensatory strategies, or learned to use their cognitive strengths to overcome areas of difficulty. Yet the fact that a person has successfully compensated does not necessarily tell us what their underlying neurodevelopmental profile looks like, not even to mention their subjective quality of life.

If you recognize yourself in this “almost functional” experience—high achievement or apparent competence alongside chronic internal effort—it may be worth looking more closely at the developmental history and the strategies that have made that functioning possible. At Silhouette Psychotherapy, we pay particular attention to the distinction between what is visible from the outside and what a person has had to do internally to maintain that level of functioning.

THE MECHANISM OF MUTUAL CONCEALMENT: HOW EACH MASKS THE OTHER

Here are some of the ways that this can unfold in real lives:

Scenario 1: If ADHD Were Primary, It Would Mask Autism

ADHD diagnoses may result in autism remaining invisible because executive functioning difficulties may be exclusively attributed to ADHD. This might look like a person's difficulty with various tasks for sensory reasons, being simply explained as ADHD executive dysfunction. Another example could be sleep disruption from autistic hyperfocus on passionate interests and activities being overly attributed to ADHD impulsivity or poor time management. Difficulty with transitions that are part of an autism profile may be overly framed as ADHD impulsivity and poor planning. Autistic sensory sensitivity and resulting dysregulation responses may be overly attributed to ADHD emotional dysregulation. Autistic deep engagement with interests may be explained as ADHD hyperfocus. Intensity and persistence of interests as an autism trait may be attributed to ADHD reward-seeking and dopamine-driven behavior. Autistic difficulty disengaging may be misunderstood as solely ADHD impulsivity.

The clinician and the client would have a framework (ADHD) that may only partially explains the individual and thereby conclude that looking more deeply is unnecessary. The autism—the sensory hypersensitivity, the environmental rigidity, the early childhood onset of restricted interests, the social withdrawal—would remain unrecognized.

This is an illustration of how having one explanatory framework can inadvertently reduce curiosity about the rest of the neurotype. If ADHD appears to explain attention difficulties, emotional dysregulation, hyperfocus, or executive-function challenges, autism-related sensory, social, behavioral, and developmental differences may be interpreted as extensions of ADHD rather than considered separately.

For someone who has received an ADHD diagnosis but continues to recognize experiences that do not seem fully explained by ADHD, this may be an important area to explore. A comprehensive assessment can consider whether there are additional developmental patterns that have been overshadowed by an existing diagnosis.

Scenario 2: If Autism Were Primary, It Would Mask ADHD

Conversely, imagine that autism is being assessed, any ADHD features could be obscured. ADHD selective attention could be oversimplified by restricted interests.

Exceptional focus on preferred tasks could be entirely attributed to autism-related restricted interests and hyperfocus. Difficulty with non-preferred tasks could be framed as autism-related task avoidance or lack of intrinsic motivation. The distinction between ADHD inattention and autism-related selective attention could be missed.

Executive functioning difficulties could be exclusively attributed to autism without any examination of ADHD executive functioning profiles. Difficulty with life management could be explained as autism-related difficulty with transitions and task-switching without any curiosity about the impact of ADHD. Sleep disruption could be exclusively attributed to autism-related hyperfocus and difficulty disengaging. Difficulty with transitions could be framed solely as autism-related "rigidity" (neuronormative label) rather than ADHD impulsivity.

Emotional dysregulation responses to sensory overstimulation and environmental changes could be entirely attributed to sensory hypersensitivity. Outbursts (or concealed “in-bursts”) from environmental overstimulation could be framed as sensory overwhelm from auditory input. Any ADHD-related emotional dysregulation or impulsivity could be subsumed under autism-related sensory dysregulation.

The assessor would have a framework (autism) that explains much of her presentation, making ADHD assessment seem unnecessary. unless they are dually assessed. There is risk that any ADHD traits or features would be reinterpreted through an autism lens.

The same problem can therefore occur in the opposite direction. Once autism provides a compelling explanation for sensory experiences, interests, transitions, social differences, and emotional responses, ADHD-related attention regulation and executive-function difficulties may be understood entirely through an autism framework. This is particularly relevant when the adult has developed strong compensatory systems and has learned to use structure, routines, or intense interest to manage struggles with attention and task completion.

This is why the question is not necessarily which diagnosis can explain one isolated behavior. The more clinically useful question is often what pattern emerges across development, contexts, environments, demands, and the person's internal experience.

EXAMPLE 1: WHERE AUTISM AND ADHD COULD BE CONCEALING EACH OTHER

The Ambiguous Territory: Hyperfocus or Restricted Interests?

Difficulty disengaging from activities can similarly be understood through either an autism or ADHD lens. From an autism perspective, this may reflect highly intense interests, described as “restricted” interests in DSM terminology, difficulty with transitions, persistence and tenacity associated with autistic rigidity, or concern about losing specific thoughts due to a strong focus on detail. From an ADHD perspective, difficulty disengaging may reflect hyperfocus on intrinsically rewarding activities, challenges with task-switching and transitions related to executive dysfunction, impulsive continuation of an activity despite intending to stop, or time blindness that makes it difficult to estimate how long one has been engaged in a task.

The Clinical Reality: Both interpretations may fit aspects of the person’s presentation. When both are present, however, the picture may be more complicated than either framework alone. The same behavior can emerge from different mechanisms, and different mechanisms can coexist in the same person. This is why understanding the broader developmental pattern is often more informative than attempting to classify individual behaviors in isolation.

For adults who recognize themselves in both descriptions, uncertainty is not necessarily a sign that they are imagining their difficulties or that one diagnosis must be incorrect. It may simply mean that the presentation deserves a more comprehensive evaluation. If you have been trying to determine for yourself whether something is “autism” or “ADHD” based on individual traits, a professional assessment can help place those traits within the larger context of your developmental history and current functioning.

The Ambiguous Territory: Selective Attention or Inattention?

Let's consider an adult who has exceptional sustained attention to preferred activities and visually detailed work, yet struggles to engage with non-preferred tasks. From an autism perspective, this pattern may reflect interest-dependent attention, difficulty with task-switching associated with monotropism, or a preference for solitary, highly focused activities. From an ADHD perspective, it may reflect selective attention toward high-interest or high-stimulation activities, executive dysfunction that becomes more apparent during low-interest or low-stimulation tasks, or inattention that has been masked by high intelligence and highly structured environments.

The same observable pattern can therefore raise different clinical questions. Someone who can spend hours immersed in a preferred activity but struggles to initiate a routine household task may appear highly focused in one context and inattentive in another. Looking only at the successful task can obscure the difficulty; looking only at the difficult task can obscure the person's capacity for intense, sustained attention.

The Ambiguous Territory: Emotional Dysregulation or Sensory Dysregulation?

Weeping and/or rage-weeping responses, whether externalized or internalized, to aversive sensory input, threats to autonomy, or unexpected environmental changes can be difficult to distinguish diagnostically, as they may reflect either autism-related sensory dysregulation or ADHD-related emotional dysregulation. From an autism perspective, these responses may reflect sensory hypersensitivity accompanied by a dysregulation response, environmental rigidity and distress when routines or expectations are disrupted, or a sensory-driven emotional reaction. From an ADHD perspective, the same responses may be understood as emotional dysregulation, difficulty with frustration tolerance, or impulsive emotional responses.

Again, the observable response does not necessarily reveal the underlying mechanism on its own. Sensory input, frustration, executive-function demands, transitions, unexpected changes, and attentional dysregulation can interact in complex ways. For a highly masked adult, some of these responses may also be internalized rather than outwardly visible, making them even easier to overlook.

THE COST OF MASKING: SECONDARY CONDITIONS AND BURNOUT

What One’s Life History Suggests About Cumulative Masking

Often, the person’s history contains markers of the eviscerating cost of long-term masking. Many neurodivergent adults have developed an autopilot mode of forced compliance and overriding their innate preferences, and doing so by default. This may look like having learned to override one's own sensory and physiological responses and learned to suppress one's natural inclinations. This creates a pattern of self-override and disconnection from one's own needs that becomes the foundation of entire lives. There is often underlying burnout and identity confusion—both of which are common complex trauma sequelae of long-term masking.

Studies of late-diagnosed autistic and ADHD adults consistently find that masking carries measurable mental health costs through minority stress, burnout, and self-medication. For those who have spent years or decades constructing a functional identity around masking, a late diagnosis does not simply add information—it can precipitate identity crisis and require significant emotional and identity integration and re-integration.

For some adults, late identification can therefore be both deeply validating and emotionally disruptive. A diagnosis or clearer understanding of one's neurotype may provide an explanation for experiences that previously felt like personal failures, while also requiring the person to reconsider long-held assumptions about themselves and their needs. Some adults may begin to understand why certain environments were exhausting, why particular social expectations felt disproportionately difficult, or why their strategies for functioning eventually became unsustainable.

If you have reached a point where the strategies that once allowed you to compensate are no longer working as they once did, that does not necessarily mean that you have suddenly become less capable. It may mean that the demands have changed, your available resources have changed, or that the cumulative cost of years of compensation has become harder to sustain. Exploring that history can be an important part of determining what kind of support may actually be useful now.

CLINICAL IMPLICATIONS: WHAT THIS MEANS FOR ASSESSMENT AND TREATMENT

The Risk of Diagnostic Overshadowing

If an autism assessment concludes autism without simultaneously completing a thorough ADHD assessment, ADHD could be missed. Conversely, if ADHD were identified first, autism would likely remain unrecognized. Whether an ADHD or autism assessments is done first, if that first assessment reveals strong indicators, there is both a clinical and client risk that the other assessment will be considered unnecessary and that ADHD features will be reinterpreted through an autism lens, or Autism features will be reinterpreted through an ADHD lens.

This does not mean that every adult requires simultaneous assessment for both conditions. Rather, when the developmental history and presenting concerns suggest meaningful indicators of both, considering the possibility of both can reduce the risk of diagnostic overshadowing and provide a more complete picture of the individual's needs.

The Importance of Comprehensive Assessment

While we always respect client preferences when they wish to assess for only one condition, at Silhouette Psychotherapy we increasingly recommend comprehensive assessment for both autism and ADHD in adults, particularly for women and gender-diverse individuals, who may have higher rates of masking; adults without intellectual disability, who may have greater capacity to compensate for neurodevelopmental differences; late-identified individuals, who may have spent longer periods masking or adapting to their environments; and those who have achieved significant academic or professional success despite experiencing substantial internal struggle.

The reason for this recommendation is not simply to identify more diagnoses. It is to avoid allowing a single explanatory framework to obscure other meaningful aspects of a person's developmental history. For a highly compensated adult, assessment may need to consider not only observable symptoms but also the strategies, environmental accommodations, effort, and masking that have allowed those symptoms to remain less visible.

We specialize in assessments with highly compensated, late-identified adults whose autism and ADHD have remained invisible to themselves and others. In many cases, high intelligence has enabled academic and professional success, while female socialization has encouraged masking and social compliance. Structured environments, such as medical training and professional roles, may have accommodated their needs without requiring explicit recognition of underlying neurodivergence. Selective attention and hyperfocus may have been attributed to either autism or ADHD, while sensory sensitivities were managed through avoidance and environmental control. Similarly, restricted interests were often integrated into socially acceptable activities, allowing underlying autistic traits to remain unrecognized.

Integrating an understanding of one's neurotype into one's sense of self in adulthood is the vital piece that allows the missing clarity and knowledge base. This piece is imperative and foundational for being able to learn how to reduce the masking that has often contributed to experiences of cumulative load overwhelm and burnout. This has been misunderstood for way too many years, in way too many neurodivergent adults.

For someone who has spent years compensating, adapting, and pushing through, the goal is not simply to become better at functioning. It can also be to understand why functioning has required so much effort in the first place. A clearer understanding of your neurotype can provide a foundation for identifying appropriate accommodations, developing sustainable strategies, reducing unnecessary masking, and building a relationship with your authentic self and real and valid needs that is less dependent on constant self-override.

If you have spent years being told that you are functioning well because you are academically or professionally successful, while privately experiencing a very different reality, that discrepancy may be worth exploring. You do not need to arrive at an assessment already knowing whether autism, ADHD, or both explain your experience. The purpose of a comprehensive assessment is to examine the developmental and current patterns and determine what formulation best accounts for the whole picture.

At Silhouette Psychotherapy, we work with adults whose autism and/or ADHD may have remained hidden behind intelligence, achievement, structure, masking, and compensation. Our approach looks beyond surface-level functioning to consider developmental history, sensory experiences, executive functioning, attention, interests, social experiences, masking, compensation, and the cumulative cost of maintaining outward success.

If you are beginning to recognize yourself in this pattern, exploring an adult autism and ADHD assessment may be one way to move from simply trying harder to understanding what you actually need. Sometimes the most important question is not “Am I functioning?” but “What does it take for me to function, and what happens when I can no longer maintain the compensation?” For highly masked adults, that distinction can be the beginning of a very different understanding of their life history and a more sustainable way forward.

© 2026 Raven LeFebvre. All rights reserved.

Raven LeFebvre, LCSW, LCSW-C, LICSW, MAC, Founder, Silhouette Psychotherapy

Written by: Raven LeFebvre, LCSW, LCSW-C, LICSW, MAC, Owner and Founder, Silhouette Psychotherapy

Certified Clinical Trauma Professional Level 2 (CCTP-II)

PDA North America Level 1 Certified Clinician

​​© 2024-2026 Raven LeFebvre. All rights reserved. 

This publication is intended for educational purposes only and is not a substitute for professional assessment, psychotherapy, clinical intervention, diagnosis, or mental health or medical advice. Feel free to reach out to learn about any of our clinical services.

All ideas, concepts, perspectives, and creative direction are entirely my own. All concepts are concepts I have been working with clients in regard to, for years, behind closed doors in sessions. AI was used only as a supplementary tool for minor edits, flow and fomat final touches, and polishing.