Glossary

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Mobile AAC(also: Smartphone AAC, App-Based AAC)

Augmentative and alternative communication systems delivered through mainstream mobile devices such as smartphones and tablets, rather than dedicated AAC hardware. Mobile AAC applications can significantly reduce costs and stigma associated with dedicated devices, and are…

Mobile AR(also: Smartphone AR, Handheld AR)

Augmented reality experiences delivered on commodity smartphones and tablets using the built-in camera, display, inertial sensors, and (increasingly) depth sensors, without specialized AR headsets. Mobile AR platforms such as Apple's ARKit and Google's ARCore provide plane…

Mobile Automation(also: mobile workflow automation, trigger-action automation)

Mobile automation refers to the use of scripting tools and platform features on smartphones to automatically perform sequences of actions — such as launching apps, capturing screenshots, invoking APIs, or switching contexts — in response to user-defined triggers. On iOS, Apple…

Mobile Health Game(also: mHealth Game, Health Gamification App)

A mobile application that uses game mechanics and play-based interaction to support health management behaviors such as medication adherence, physical activity, dietary choices, and health monitoring. Mobile health games leverage gamification elements like points, leaderboards,…

Mobile Health Technology(also: mHealth, Mobile Health, MHT)

The use of mobile devices such as smartphones and tablets to deliver health services, information, and interventions. In accessibility contexts, mobile health technology is significant because smartphones are often the most accessible and affordable computing device available to…

Mobile Makerspace(also: Maker Van, Makerspace on Wheels, Mobile Maker Lab)

A portable makerspace housed in a vehicle or transportable unit that brings making tools, materials, and activities to different locations rather than requiring participants to travel to a fixed facility. Mobile makerspaces are particularly valuable for reaching underserved or…

Mobile OCR(also: Smartphone OCR, Camera-based OCR)

Optical character recognition performed using a smartphone or tablet camera rather than a traditional flatbed scanner. Mobile OCR apps like KNFB Reader, Prizmo, and Text Detective enable blind and visually impaired users to capture and read printed text on the go, including…

Mobile Phone(also: Cell Phone, Cellular Phone, Mobile)

A mobile phone is a portable radio-telephone that connects to the public telephone network over cellular radio infrastructure. In digital-accessibility practice mobile phones are both an accessibility tool and an accessibility barrier: they are a primary delivery mechanism for…

Mobile Virtual Reality(also: Mobile VR, Smartphone VR)

Virtual reality systems delivered through a smartphone and consumer-grade accessories (wireless headphones, simple hand-held mounts) rather than a dedicated head-mounted display and PC rig. For accessibility, mobile VR is significant because it uses devices that blind and…

MobileASL

A research project from the University of Washington that developed video compression technology enabling real-time, two-way American Sign Language (ASL) video communication on mobile phones. MobileASL addressed the challenge that standard mobile video calling consumed too much…

Mobility Aid(also: Mobility Device, Mobility Equipment)

A mobility aid is any device designed to assist people with mobility impairments in moving from one place to another, including wheelchairs, walkers, rollators, canes, crutches, and powered scooters. These devices are a subcategory of assistive technology focused specifically on…

Mobility Assessment(also: Mobility Evaluation, Gait Assessment)

A clinical evaluation that quantifies a person's movement capabilities, including walking pattern, balance, and motor performance. Mobility assessments are used to diagnose conditions like Parkinson's Disease, monitor disease progression, and plan treatment. Traditional…

Model-Based Sonification(also: MBS)

A sonification approach in which a virtual model or simulation is constructed from the data, and sound is produced through the user's interaction with that model. Rather than passively mapping data to sound (as in parameter mapping), model-based sonification creates a dynamic…

Modifier Key(also: Modifier Keys)

A key on a keyboard that modifies the action of another key when both are pressed simultaneously, such as Shift, Control (Ctrl), Alt, Option, or Command. Modifier keys present a significant accessibility barrier for users who can type with only one hand or who have difficulty…

Modifier Tactile Pattern(also: Modifier Tacton, Compound Tacton)

A vibrotactile design technique that combines two or more independent Tactons, each conveying a separate parameter, into a single composite pattern. Changing one component modifies one dimension of meaning while the other remains constant, allowing multiple pieces of information…

Monarch(also: Monarch Tactile Display, Dynamic Tactile Device)

The Monarch is a multi-line refreshable tactile display developed by HumanWare and the American Printing House for the Blind, representing a significant advancement in tactile display technology. Unlike traditional single-line refreshable Braille displays that show only one row…

Monocular(also: Handheld Monocular, Bioptic Telescope)

A small, handheld or head-mounted telescope used by people with low vision to magnify distant objects. Monoculars are commonly used in educational settings to view chalkboards, whiteboards, and projected presentations from a distance. While effective for far-sight tasks,…

Morse Code(also: Morse Code Input)

A communication system that encodes text characters as sequences of short signals (dots) and long signals (dashes). Originally developed for telegraphy, Morse code has found significant application in assistive technology as an alternative text input method for people with…

Motion Capture(also: MoCap, Movement Tracking)

Technology that records the movements of people or objects, typically using cameras, sensors, or computer vision, and translates them into digital data for animation or analysis. In sign language applications, motion capture tracks hand, body, and facial movements to drive…

Motion Gaming(also: Motion-Based Gaming, Gesture-Based Gaming)

Video games that use body movements as input, typically through motion-sensing controllers (Nintendo Wii) or depth cameras (Microsoft Kinect) rather than traditional button-based controllers. Motion gaming has significant applications in rehabilitation, where it can make…

Motion History Image(also: MHI)

A computer vision technique that represents motion in video sequences as a single grayscale image, where pixel intensity indicates recency of movement. Brighter pixels represent more recent motion while darker pixels show older movement patterns. In accessibility applications,…

Motion Impairment(also: Motor Impairment, Physical Impairment, Mobility Impairment)

A condition that limits a person's ability to control voluntary physical movement, affecting fine or gross motor skills, strength, coordination, or range of motion. Motion impairments may result from conditions such as cerebral palsy, muscular dystrophy, spinal cord injury,…

Motion Sensor(also: Motion Detection, Gesture Sensor)

A device that detects physical movement in its environment, often by tracking body position, joint angles, or gestures. In accessibility and assistive technology, motion sensors enable touchless interaction, gesture-based interfaces, and movement-tracking rehabilitation systems.…

Motion Tracking(also: Motion Capture, MoCap, Body Tracking)

Technology that records and analyses the movement of people or objects in real time, typically using cameras, sensors, or wearable devices to capture position, orientation, and velocity data. In accessibility applications, motion tracking enables systems to compare a user's body…

Motion capture(also: Mocap)

The process of recording the movement of objects or people, typically using optical systems with reflective markers, depth cameras, or body-worn sensors. Motion capture is used in accessibility research to create ground-truth datasets for developing assistive body-tracking…

Motion-Based AAC(also: Physical Expressive AAC, Expressive Sidekick)

An emerging form of augmentative and alternative communication that uses physical movement of objects or robotic devices to convey nonverbal communicative intent during conversations. Unlike traditional AAC which focuses on generating speech, motion-based AAC addresses the…

Motor Accessibility(also: Physical Accessibility, Motor Impairment Accessibility)

Motor accessibility refers to the design of digital systems and interfaces to be operable by people with physical disabilities affecting movement, strength, coordination, or fine motor control. Relevant conditions include cerebral palsy, muscular dystrophy, spinal cord injury,…

Motor Imagery(also: MI, Mental Practice, Imagined Movement)

The mental rehearsal or imagination of physical movement without actual motor execution. In brain-computer interfaces, motor imagery typically involves imagining left-hand or right-hand movements, which produce distinct patterns in the sensorimotor cortex that can be detected…

Motor ability(also: Motor function, Motor capacity)

The capacity to perform physical movements required for interaction with technology and the environment, encompassing sub-constructs including strength, dexterity, coordination, range of motion, speed, accuracy, endurance, and tremor control. Motor ability is not a fixed trait…

Motor control(also: Motor coordination, Movement control)

The process by which the nervous system coordinates muscles and limbs to produce purposeful, accurate movement. Motor control involves planning movements, executing them, and using sensory feedback to make real-time corrections. Impairments in motor control — caused by…

Mouse(also: Computer Mouse, Optical Mouse)

A mouse is a hand-operated pointing device that translates relative motion across a flat surface into movement of an on-screen cursor, with one or more buttons and usually a scroll wheel for selection and additional commands. It is the dominant pointing device for desktop…

Mouse Alternative(also: Alternative Pointing Device, Mouse Replacement)

A mouse alternative is any input device or technique that lets a user perform pointer-control tasks — moving a cursor, clicking, dragging, selecting — without using a conventional mouse. For people with motor impairments, mouse alternatives include trackballs, head-pointer and…

Mouse Emulation(also: Mouse Simulation, Virtual Mouse)

Software or hardware that simulates mouse pointer movement, clicks, and other mouse actions using alternative input methods such as head tracking, eye gaze, joysticks, switch scanning, keyboard commands, or biosignal interfaces. Mouse emulation enables people who cannot use a…

Mouth Interface(also: Mouth-operated interface, Mouth-based input)

An input modality that uses mouth movements - tongue position, cheek puffs, jaw motion, lip gestures, breath, or sip-and-puff - to control a computer, wheelchair, or XR system. Mouth interfaces serve people with limited upper-limb mobility (e.g., spinal cord injury, muscular…

Mouth Joystick(also: Lip Joystick, Mouth-Operated Joystick)

An assistive input device controlled by the user's mouth, lips, or tongue that functions as a pointer or gamepad joystick. The user moves a small stick held between the lips to direct cursor or on-screen movement; selection is typically triggered by a sip-and-puff switch, chin…

Movement Sonification(also: Motion Sonification)

The practice of mapping qualities of physical movement - such as speed, direction, duration, or weight - to non-verbal sound cues so that movement can be perceived auditorily. In accessibility contexts, movement sonification can convey information about body motion to blind and…

Multi-Sensory Environment(also: MSE, Snoezelen, Multisensory Room)

A specially designed space that combines sensory stimuli — such as lighting, sound, textures, and aromas — to provide therapeutic, calming, or stimulating experiences for people with disabilities. Originally developed in the Netherlands under the name Snoezelen, multi-sensory…

Multi-Sensory Feedback(also: Multimodal Feedback, Cross-Modal Feedback)

The simultaneous or coordinated use of multiple sensory channels—such as audio, haptic, visual, and sometimes olfactory or thermal—to convey information to a user. Multi-sensory feedback is a key accessibility strategy because it ensures that information is not conveyed through…

Multi-touch Interaction(also: Multi-touch Input, Multi-touch Gestures)

An input method where a touchscreen or trackpad recognises two or more simultaneous points of contact, enabling gestures such as pinching, rotating, and swiping with multiple fingers. In accessibility contexts, multi-touch interaction is significant both as a challenge and an…

Multilingual AAC(also: Multilingual Communication Device)

Augmentative and alternative communication systems designed to support communication in multiple languages, reflecting the linguistic diversity of users and their communication partners. Multilingual AAC is particularly important in the Global South, where multilingualism is…

Multimodal(also: Multimodal Interaction, Multimodal Interface)

Relating to communication or interaction that uses multiple sensory channels or modes simultaneously, such as vision, hearing, touch, and speech. In accessibility, multimodal approaches are essential for making information available to people who cannot access one or more…

Multimodal AI(also: Multimodal Generative AI)

Artificial intelligence systems capable of processing and generating content across multiple modalities such as text, images, audio, and video. In accessibility contexts, multimodal AI is significant because a single tool can address diverse access needs — for example,…

Multimodal Alert System(also: Multi-Sensory Alert, Multimodal Notification)

A notification system that communicates alerts through multiple sensory channels simultaneously, such as combining audio, visual, and haptic signals. Multimodal alert systems are critical for accessibility because they ensure people with different sensory abilities can perceive…

Multimodal Assistive Technology(also: MAT, Multimodal AT)

Assistive technology that combines multiple sensory channels — such as audio, vibrotactile (vibration), visual, and tactile feedback — to convey information and enable interaction. By distributing information across different sensory modalities, multimodal assistive technologies…

Multimodal Communication(also: Multi-Modal Communication)

The use of multiple channels and resources simultaneously during interaction, including speech, gesture, gaze, facial expression, body movement, writing, drawing, and physical artifacts. All human communication is inherently multimodal, but this concept is especially significant…

Multimodal Cueing

Multimodal cueing is the simultaneous or selectable use of two or more sensory channels - typically visual, auditory, and somatosensory (vibrotactile) - to guide motor behaviour during rehabilitation or assistive interaction. The rationale is that different modalities engage…

Multimodal Feedback(also: Multi-Sensory Feedback)

The simultaneous or coordinated use of multiple sensory channels — such as auditory, tactile, and visual — to convey information to a user. In accessibility, multimodal feedback is essential for creating inclusive interfaces that do not rely on a single sense. Combining audio…

Multimodal Input(also: Multimodal Interaction, Multi-modal Input)

An interaction approach that allows users to communicate with computing devices or systems through multiple input channels — such as touch, voice, eye gaze, head movement, facial expressions, hand gestures, brain-computer interfaces, and biometrics — either simultaneously or…

Multimodal Instruction(also: Multimodal Feedback, Multimodal Learning)

An instructional approach that combines two or more sensory modalities - such as verbal narration, non-verbal sound, haptic or tactile feedback, and visual demonstration - to convey information. In accessibility, multimodal instruction is used to replace or supplement…

Multimodal Interface(also: Multimodal Interaction, Multi-Modal UI)

A multimodal interface is a system that communicates with users through multiple sensory channels simultaneously, such as speech, haptic feedback, sound, vibration, and visual output. In accessible navigation and assistive technology, multimodal interfaces are critical because…