Glossary

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Nemeth Braille Code(also: Nemeth Code, Nemeth Mathematics Braille)

A system of Braille encoding developed by Abraham Nemeth in 1946 for representing mathematical and scientific notation, widely used in the United States and some other English-speaking countries. The Nemeth Code uses combinations of standard six-dot Braille cells with…

Nemeth Code(also: Nemeth Braille Code for Mathematics and Science)

A specialized braille code developed by Abraham Nemeth for representing mathematics, science notation, and technical symbols. Nemeth Code provides a comprehensive system for expressing equations, fractions, subscripts, superscripts, and other mathematical constructs in braille.…

Networked Minds Social Presence Inventory(also: Networked Minds Measure of Social Presence, NMSPI)

The Networked Minds Social Presence Inventory is a self-report questionnaire developed by Biocca, Harms and colleagues to measure social presence - the sense of 'being together' with another person - in mediated environments such as video calls, virtual reality or augmented…

Neural Control(also: Neural Interface, Neural Signal Input)

A method of computer interaction where users modulate their brain signals, detected through electroencephalography (EEG) or other neural monitoring technologies, to generate input commands. Neural control users can typically produce a small number of distinct signals by…

Neural Network(also: Artificial Neural Network, ANN)

A machine learning model inspired by the structure of biological neural networks in the brain, consisting of interconnected layers of nodes (neurons) that process information by adjusting weighted connections during training. In accessibility and assistive technology, neural…

Neural Plasticity(also: Neuroplasticity, Brain Plasticity)

The brain's ability to reorganize itself by forming new neural connections throughout life. In the context of accessibility, neural plasticity explains how people who are blind or visually impaired develop enhanced auditory and tactile processing abilities—the brain regions that…

Neural Prosthetics(also: Neuroprosthetics, Neural Prostheses)

Devices that interface directly with the nervous system to restore or supplement lost sensory, motor, or cognitive functions. Neural prosthetics can be input devices (reading neural signals to control external equipment, as in brain-computer interfaces) or output devices…

Neural Radiance Field(also: NeRF)

An implicit neural representation of a 3D scene, introduced by Mildenhall et al. in 2020, in which a small neural network is trained to map any 3D coordinate and viewing direction to a colour and density value. Rendering is performed by volumetric ray marching through this…

Neural Vocoder

A deep-learning model that synthesises audio waveforms from intermediate acoustic representations such as mel-spectrograms or discrete speech units. Examples include HiFi-GAN, WaveNet, WaveGlow, and SoundStream. Neural vocoders have largely replaced classical signal-processing…

Neuroaffirmative Practice(also: Neurodiversity-Affirming Practice, Neuroaffirming Approach)

An approach to support, therapy, education, and technology design that affirms neurodivergent identities and ways of being rather than seeking to normalize them. Neuroaffirmative practice recognizes neurodivergent traits (like stimming, intense interests, and different…

Neurodegenerative Disease(also: Neurodegenerative Disorder, Neurodegeneration)

A category of diseases characterized by progressive loss of structure or function of neurons, including death of nerve cells. Common neurodegenerative diseases include Alzheimer's disease, Parkinson's disease, Huntington's disease, and Amyotrophic Lateral Sclerosis (ALS). These…

Neurodevelopmental Condition(also: Neurodevelopmental Disorder, Neurodevelopmental Disability)

A group of conditions that arise from differences in brain development and affect how a person processes information, learns, communicates, and interacts with the world. Common neurodevelopmental conditions include ADHD, autism spectrum disorder, dyslexia, dyscalculia,…

Neurodevelopmental Conditions(also: Neurodevelopmental Disorders, NDD)

A group of conditions that affect brain development and function, typically emerging in early childhood. These include autism spectrum disorder, ADHD, intellectual disabilities, Down syndrome, and specific learning disabilities. In accessibility, understanding neurodevelopmental…

Neurodevelopmental Disorder(also: NDD)

A group of conditions that arise during the developmental period and are characterized by developmental deficits that produce impairments in personal, social, academic, or occupational functioning. Neurodevelopmental disorders include ADHD, autism spectrum disorder, intellectual…

Neurodevelopmental Disorder(also: NDD, Neurodevelopmental Disability)

An umbrella term for a group of conditions that originate during the developmental period and involve impairments in cognitive, social, emotional, or motor functioning. Common neurodevelopmental disorders include autism spectrum disorder, ADHD, intellectual disability, and…

Neurodevelopmental Disorders(also: NDD, Neurodevelopmental Disabilities)

A group of conditions that originate during the developmental period and are characterized by impairments in personal, social, academic, or occupational functioning. Neurodevelopmental disorders include intellectual disability, autism spectrum disorder, ADHD, specific learning…

Neurodivergence(also: Neurodiversity, Neurodivergent)

The natural variation in human neurological development and functioning that includes conditions such as autism, ADHD, dyslexia, anxiety disorders, intellectual disabilities, and other neurological differences. The neurodiversity paradigm frames these differences as natural…

Neurodivergent(also: Neurodiverse Individual, ND)

A term describing individuals whose neurological development and functioning differ from what is considered typical or "neurotypical." Neurodivergent conditions include ADHD, autism spectrum disorder, dyslexia, dyscalculia, Tourette syndrome, and other neurological differences.…

Neurodivergent Movement(also: Neurodiversity Movement)

A social movement, largely driven by online collective action beginning in the early 2000s, that challenges traditional deficit-based models of neurological differences like ADHD, autism, dyslexia, and other cognitive variations. The movement advocates for understanding these…

Neurodivergent Questioning(also: ND Questioning)

A term adapted from gender questioning that describes people who are in the process of figuring out how to describe and label their neurocognitive functioning and who have reason to think they might be neurodivergent, but have not yet received or pursued a formal diagnosis.…

Neurodiversity(also: Neurological diversity)

A concept that regards differences in brain function and behavioural traits — including autism, ADHD, dyslexia, dyspraxia, and intellectual disability — as natural variation within the human population rather than deficits or disorders. The term emerged from autistic…

Neurodiversity Movement(also: Neurodiversity Paradigm)

A social movement and intellectual framework that regards neurological differences—including autism, ADHD, dyslexia, and other conditions—as natural and valuable forms of human diversity rather than disorders or deficits to be cured. The neurodiversity movement, originating from…

Neurofeedback(also: EEG Biofeedback, Neurotherapy)

Neurofeedback is a type of biofeedback that uses real-time monitoring of brain electrical activity (typically via EEG) to teach individuals to self-regulate their brain function. Users receive feedback — often through visual, audio, or game-based interfaces — about their current…

Neuroinclusive Design(also: Neurodiverse Design, Neurodiversity-Affirming Design)

A design approach that explicitly accounts for the varied cognitive, sensory, and communication needs of neurodivergent individuals alongside neurotypical users. Neuroinclusive design goes beyond general accessibility by addressing specific patterns such as different information…

Neuromuscular Disease(also: Neuromuscular Disorder, NMD)

A broad category of conditions that affect the nerves controlling voluntary muscles, the muscles themselves, or the communication between nerves and muscles. Neuromuscular diseases include muscular dystrophies, motor neurone disease (ALS), spinal muscular atrophy, myasthenia…

Neuromuscular Disorders(also: Neuromuscular Diseases, NMDs)

A broad group of medical conditions that impair the functioning of muscles, either through direct pathology of the muscle tissue, the peripheral nerves that control them, or the neuromuscular junction where nerves connect to muscles. Neuromuscular disorders include amyotrophic…

Neuronormative(also: Neuronormativity)

The assumption that neurotypical cognitive patterns — such as sustained linear attention, consistent daily productivity, conventional social communication, and predictable emotional regulation — represent the default or ideal way of functioning. Neuronormative standards are…

Neuronormativity(also: Neurotypical bias, Neuronormative standards)

The set of assumptions, norms, and practices that privilege neurotypical cognition as the default and superior way of thinking, communicating, and functioning, while treating neurodivergent ways of processing as deficient or deviant. Neuronormativity manifests in technology…

Neuroplasticity(also: Brain Plasticity, Neural Plasticity)

The brain's ability to reorganize its structure and function in response to experience, learning, and environmental stimulation throughout life. Neuroplasticity is a legitimate neuroscience concept, but in autism tech marketing it is often invoked to suggest that technology can…

Neuropsychological Assessment(also: Neuropsychological Testing, Cognitive Assessment)

A systematic evaluation of cognitive, behavioural, and emotional functioning through standardised tests designed to measure specific brain-behaviour relationships. In the context of accessibility and rehabilitation, neuropsychological assessments are used to identify and…

Neuroqueer Technoscience

A theoretical framework, developed by Nick Walker and extended in HCI by Barros Pena, Williams and others, that builds on crip technoscience and the neuroqueer paradigm to position neurodivergent people as active agents who remake worlds, technologies, and social relations.…

Neurotrophic Electrode(also: Neurotrophic Brain Electrode, Cone Electrode)

A type of implantable brain electrode designed for long-term, stable recording of neural signals. Unlike conventional electrodes that sit on the brain surface or are inserted as rigid probes, a neurotrophic electrode consists of a hollow glass cone coated with neurotrophic…

Neurotype

A classification of minds based on patterns of neurological functioning. The term encompasses both neurotypical (conforming to dominant neurological norms) and neurodivergent (diverging from those norms, including autism, ADHD, dyslexia, and other neurological variations).…

Neurotypical(also: NT)

A term used to describe individuals whose neurological development and cognitive functioning fall within the range considered typical by prevailing societal standards — that is, people who do not have autism, intellectual disabilities, learning disabilities, or other…

Neurotypical Masking(also: Masking, Social Camouflaging)

The practice of neurodivergent individuals consciously or unconsciously suppressing their natural behaviours and adapting their communication style to conform to neurotypical social expectations. In accessibility contexts, some neurodivergent people use AI chatbots to help with…

Neurotypical Norms(also: Neurotypical Standards, Normative Expectations)

Social, behavioural, and professional expectations that are based on neurotypical patterns of cognition, communication, and functioning, often embedded unconsciously in technology, workplace culture, and institutional practices. Examples include job postings requiring candidates…

News Snacking(also: News Grazing)

A pattern of news consumption characterized by short, dispersed bursts of engagement rather than sustained reading sessions. News snacking typically involves quickly scanning headlines or listening to brief audio updates throughout the day, often during commutes, meals, or…

Newsela

An educational content platform that publishes news articles in multiple professionally-edited versions simplified to different U.S. school reading levels, enabling teachers to assign the same story at grade-appropriate difficulty. Because Newsela pairs original articles with…

Node Map(also: Topological node map, Graph map)

A graph-based representation of a walkable space in which each node corresponds to a meaningful point — typically an intersection, a destination (room, exit, stairwell), or the user's current position — and each edge corresponds to a traversable corridor or path. Node maps are…

Node-Link Diagram

A visual representation in which discrete entities (nodes) are drawn as shapes such as circles or boxes and relationships between them are drawn as connecting lines or arrows (links/edges). Node-link diagrams are the default visualization for trees, graphs, flowcharts,…

Noise Sensitivity(also: Auditory Hypersensitivity, Hyperacusis, Sound Sensitivity)

A heightened physiological and emotional response to sounds that others may tolerate without difficulty. Common among autistic individuals and people with other sensory processing differences, noise sensitivity can cause distress, anxiety, and sensory overload in everyday…

Noise sensitivity(also: Sound sensitivity, Auditory hypersensitivity)

A condition in which sounds that most people find tolerable are experienced as disproportionately distressing, overwhelming, or physically painful. Noise sensitivity exists on a spectrum from mild annoyance to extreme pain, and is common among neurodivergent individuals…

Nomadic Text Entry(also: Mobile Text Entry, On-the-Go Texting)

The practice of inputting text on a mobile device while moving through or actively engaging with the physical environment, as opposed to typing while stationary. For people who are blind or visually impaired, nomadic text entry presents unique challenges because it requires…

Non-Contact Haptics(also: Contactless Haptics, Device-Free Haptics)

A class of haptic feedback techniques that render tactile sensations on the user's body without requiring physical contact with a device, surface, or wearable. Common approaches include mid-air ultrasound haptics, air-vortex rings, and laser-induced plasma. Because they avoid…

Non-Functional Requirement(also: NFR, Quality Attribute)

A software requirement that specifies how a system should behave rather than what it should do. Non-functional requirements include accessibility, security, performance, maintainability, and usability. In web development, accessibility is a critical non-functional requirement…

Non-Manual Features(also: NMF, Non-Manual Markers, Non-Manual Signals)

The facial expressions, mouth movements, eye gaze, head tilts, and body postures that convey grammatical and semantic information in sign languages, functioning alongside manual hand signs. Non-manual features can indicate questions (raised eyebrows), negation (head shake),…

Non-Manual Markers(also: NMMs, Non-Manual Signals, Facial Grammar)

Grammatical elements in sign languages conveyed through facial expressions, head movements, eye gaze, and body posture rather than hand movements. In American Sign Language, non-manual markers are essential for conveying grammatical information such as questions (raised eyebrows…

Non-Manual Markers(also: Non-Manual Signals, NMMs, Facial Grammar)

Facial expressions, head movements, eye gaze, mouth movements, and body postures that convey grammatical information in sign languages. Unlike facial expressions in spoken languages which primarily convey emotion, non-manual markers in sign languages serve linguistic functions:…

Non-Manual Sign(also: NMS, Non-Manual Marker, Non-Manual Signal)

Facial expressions, head movements, eye gaze, mouth movements, and body posture that serve essential grammatical and linguistic functions in sign languages. In ASL, NMS perform lexical functions (distinguishing between signs like CLEAN and VERY CLEAN), morphological functions…

Non-Manual Signal(also: NMS, Non-Manual Marker, NMM)

A linguistic component of sign languages that is expressed through parts of the body other than the hands, including facial expressions, eyebrow movement, head tilts, shoulder shifts, mouth movements, and eye gaze direction. Non-manual signals serve critical grammatical…