Diagnostic Masking
entry by Julie M. Marx, Global Family Expert at Expat Valley
The phenomenon by which signs and symptoms of a neurodevelopmental condition in an internationally mobile child are obscured, misattributed, or overlooked because they are attributed to cultural adjustment, second-language acquisition, or the behavioral effects of transition stress rather than recognized as indicators of an underlying neurodevelopmental profile. Diagnostic masking can delay identification of conditions such as autism, ADHD, and specific learning differences by months or years, with consequences for access to appropriate educational support and therapeutic intervention.
Comparable terms
Diagnostic delay (clinical — the outcome of masking; broader; may arise from factors other than cross-cultural context) · Cultural misattribution (research — the specific mechanism of masking in cross-cultural contexts) · Symptom masking (clinical — broader; includes individual masking behaviors as well as externally imposed misattribution) · Camouflaging (autistic community and research — the internal, deliberate suppression of autistic traits by the individual; related but distinct from externally imposed diagnostic masking)
Why this matters
In mobile families, struggles from autism, ADHD, or learning differences are often explained away as transition stress. This delays support during crucial developmental windows. Having this term helps professionals and parents stay curious instead of dismissing patterns.
Cross-references
Diagnostic Overshadowing (Neurodiversity & Medical Complexity Abroad); Cross-Cultural Assessment (Neurodiversity & Medical Complexity Abroad); Late Diagnosis (Neurodiversity & Medical Complexity Abroad); ; BICS/CALP (Language & Identity); EAL (Education); Cultural Humility (Cultural Adaptation); SEN/SEND (Education). BICS/CALP is directly relevant — the conversational fluency that masks academic language deficits operates analogously to the cultural adjustment behaviors that mask neurodevelopmental presentations; both involve a surface competence that obscures an underlying difference. EAL provision that does not understand diagnostic masking may systematically fail to refer recently arrived multilingual children for neurodevelopmental assessment. Cultural humility is the attitudinal corrective most directly preventive of diagnostic masking; SEN/SEND describes the provision that delayed identification through masking most commonly postpones.
Sources
A case study of delayed autism diagnosis following early migration documents that early autistic features including language regression, sensory sensitivities, and social withdrawal were attributed to cultural adjustment and second-language acquisition for years before a comprehensive retrospective developmental assessment in adolescence revealed that the behaviors reflected longstanding features of ASD — illustrating how environmental transitions during key developmental periods may hinder early identification of neurodevelopmental conditions. Aguiar Soares T, Neves M, Penha R, Couto D. (2025). Lost in Transition: Delayed Diagnosis of Autism Spectrum Disorder Following Early Migration. Cureus.
Research on children of immigrants documents that clinicians may misattribute symptoms of neurodevelopmental disorders to social, behavioral, or language problems arising from the migration context, and that cultural differences in parents’ likelihood of perceiving or reporting developmental concerns further compound delay. Koumoula, A. et al. (2021). Autism spectrum and other neurodevelopmental disorders in children of immigrants: A brief review of current evidence and implications for clinical practice. Frontiers in Psychiatry, 12, 566368.
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