Diagnostic Masking
Definition:
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)
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. Published in PMC, 2025. https://pmc.ncbi.nlm.nih.gov/articles/PMC12102705/
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.
See also:
Diagnostic Overshadowing (Neurodiversity & Medical Complexity Abroad); Cross-Cultural Assessment (Neurodiversity & Medical Complexity Abroad); Late Diagnosis (Neurodiversity & Medical Complexity Abroad). Diagnostic masking and diagnostic overshadowing are closely related but should be distinguished: diagnostic masking describes the misattribution of neurodevelopmental signs to the cultural or transitional context — an error of external attribution; diagnostic overshadowing describes the clinical tendency to attribute new symptoms to an already-known condition — an error of diagnostic fixation. Both operate in internationally mobile populations and may compound each other. Practitioners working with recently relocated children presenting with adjustment difficulties should hold both mechanisms as active hypotheses.
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