Glossary

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2D Tactile Display(also: Two-Dimensional Tactile Display, Graphical Tactile Display)

A type of tactile display that presents information across a two-dimensional surface, enabling blind and low vision users to access complex graphical data such as diagrams, charts, maps, and graphical user interfaces through touch. Unlike single-line Braille displays that…

Affective Haptics(also: Emotional Haptics)

A subfield of haptic interaction design concerned with using tactile and kinaesthetic feedback — vibration, pressure, temperature, squeezing, stroking, heartbeat-like pulsation — to communicate, evoke, or regulate emotion. Affective haptics draws on research showing that touch…

Affective Touch(also: Social Touch, Emotional Touch)

The emotional and social dimension of touch, distinct from discriminative touch that identifies object properties. Affective touch is mediated primarily by C-tactile (CT) afferents in hairy skin and plays a fundamental role in social bonding, emotional communication, and…

C-tactile Afferents(also: CT afferents, C-tactile fibres, CT fibres)

Unmyelinated, slow-conducting nerve fibres found in hairy skin that respond selectively to gentle, slow stroking touch at velocities of approximately 1-10 cm/s. C-tactile afferents are strongly associated with affective and social touch, activating neural pathways linked to…

Cane Simulation(also: Virtual Cane, White Cane Simulation)

A virtual reality application that simulates the experience of using a white cane (long cane) for navigation, allowing blind users to explore virtual environments through haptic feedback. In a cane simulation, the user's finger or hand position is mapped to a virtual cane that…

Collision Detection(also: Contact Detection, Intersection Testing)

In virtual reality and haptic systems, collision detection is the computational process of determining when virtual objects come into contact with each other or with a user's virtual representation (such as a virtual hand or cane). When a collision is detected, the system can…

Core Haptics

Apple's iOS framework for designing and playing custom vibrotactile patterns on iPhone using the Taptic Engine. Core Haptics lets developers synthesize transient 'taps' and continuous vibrations, vary intensity and sharpness over time, and synchronize haptics with audio using…

Cutaneous Perception(also: Cutaneous Sense, Cutaneous Feedback, Tactile Perception)

The sensory experience derived from receptors beneath the surface of the skin that respond to temperature, pain, and pressure. In the context of assistive technology, cutaneous perception enables users to detect surface textures, raised patterns, and embossed details through…

Deep Pressure Therapy(also: DPT, Deep Pressure Stimulation, Deep Touch Pressure)

A therapeutic approach that uses firm, distributed tactile pressure — such as from weighted blankets, compression garments, or inflatable vests — to reduce anxiety, stress, and physiological arousal. Deep pressure stimulation activates the parasympathetic nervous system,…

Desensitization(also: Haptic Adaptation, Vibrotactile Adaptation)

Desensitization in the context of haptic feedback refers to the gradual reduction in a person's sensitivity to continuous or repeated vibrotactile stimulation on the skin. When haptic actuators vibrate continuously at the same location, users progressively become less able to…

Dynamic Tactile Graphics(also: Interactive Tactile Graphics, Animated Tactile Graphics)

Tactile representations of visual information that can change, move, or respond to user interaction in real time, as opposed to traditional static tactile graphics which are fixed once produced. Dynamic tactile graphics can be created through shape displays with movable pins,…

Electrical Muscle Stimulation(also: EMS, Neuromuscular Electrical Stimulation, NMES)

A technique that uses electrical impulses delivered through surface electrodes to elicit muscle contractions. EMS is used therapeutically for muscle re-education, spasticity management, and rehabilitation, and has been explored in HCI as an output modality — for example, guiding…

Electrotactile(also: Electrotactile Stimulation, Electrical Tactile Stimulation)

A form of tactile feedback that applies controlled electrical current to stimulate touch nerve endings in the skin, creating sensations of pressure, tingling, or texture. Electrotactile displays can achieve higher spatial resolution than vibrotactile systems because electrodes…

Electrotactile Feedback(also: Electrotactile, Electrical Tactile Stimulation)

A form of haptic feedback that uses controlled electrical current applied directly to the skin or through a thin insulating layer to generate tactile sensations. Unlike vibrotactile feedback (which uses mechanical vibration) or pressure feedback (which uses physical force),…

End Effector(also: Haptic Stylus, Haptic Pen)

The physical component of a haptic device that the user directly touches or manipulates to interact with a virtual environment. In assistive technology contexts, end effectors translate digital information into tactile sensations — the device applies forces, vibrations, or…

Force Feedback(also: Haptic Force Feedback, Kinesthetic Feedback)

A type of haptic technology that applies physical forces to the user through a device such as a stylus, joystick, or glove, simulating the sensation of touching or interacting with virtual objects. Unlike vibrotactile feedback which only provides vibrations, force feedback can…

Force Feedback Joystick(also: Haptic Joystick, Rumble Joystick)

An input device that combines a traditional joystick with motors or actuators that apply physical resistance, vibration, or directional forces to the user's hand, providing tactile information about the virtual environment being navigated. In accessibility applications, force…

Force Field(also: Haptic Force Field, Virtual Force Field)

In haptic interface design, a computational model that defines attractive or repulsive forces at each point in a two-dimensional workspace, used to represent graphical user interface elements as tactile objects. When a user moves a haptic pointing device through a force field,…

Free-Space Haptics(also: Mid-Air Haptics, Contactless Haptics)

Haptic feedback technology that applies physical forces or tactile sensations to a user without requiring contact with a mechanical device or surface. Unlike traditional haptic systems that use physical linkages, styluses, or vibrating surfaces, free-space haptic systems create…

Frisson(also: Aesthetic Chills, Musical Chills, Piloerection)

A psychophysiological response to music, art, or other aesthetic stimuli characterised by a pleasurable shiver or chills sensation accompanied by piloerection (goosebumps) and transient increases in heart rate and skin conductance. Frisson is associated with high emotional…

Hapget(also: Haptically-Enhanced Widget)

A hapget (haptically-enhanced widget) is a user interface element that combines a 3D visual representation with haptic (touch) feedback, audio cues, and descriptive metadata to enable non-visual interaction. Introduced in the 3D HapticWebBrowser project, hapgets transform…

Haptic Communication(also: Social Haptics, Tactile Communication, Haptic Interaction)

A method of conveying information through touch-based signals, vibrations, or physical patterns on the body. Haptic communication is particularly important for individuals with deafblindness or other multisensory impairments, where visual and auditory channels are unavailable or…

Haptic Consent(also: Vibrotactile Consent)

A consent model in which the request for, agreement to, and revocation of consent are communicated through touch or vibration rather than speech. Haptic consent is motivated by accessibility: many neurodivergent people, Deaf and hard-of-hearing people, and people in high-emotion…

Haptic Experience Model(also: HX Model, HX)

A framework proposed by Kim and Schneider for evaluating user experience with haptic technologies along five perceptual-experiential dimensions: autotelics (the pleasantness of the sensation), realism (fidelity to the depicted phenomenon), harmony (fit with accompanying…

Haptic Feedback(also: Tactile Feedback, Haptics)

Technology that communicates information through the sense of touch, using vibrations, pressure, or motion applied to the user's body. In accessibility, haptic feedback provides a non-visual, non-auditory channel for conveying alerts, navigation cues, or interface responses —…

Haptic Glove(also: Data Glove, Tactile Glove, Wearable Haptic Device)

A wearable device worn on the hand that provides tactile feedback through vibration motors, piezoelectric actuators, pin arrays, or other mechanisms embedded in the fingers and palm. In accessibility research, haptic gloves have been explored for several applications: enabling…

Haptic Input(also: Haptic Interaction, Touch Input)

Haptic input refers to interaction methods that use the sense of touch to communicate information between a user and a computer system. This includes devices such as data gloves, force-feedback controllers, and touch-sensitive surfaces that detect hand movements, gestures, and…

Haptic Pointing Device(also: Force Feedback Mouse, Haptic Mouse, Force Feedback Pointing Device)

An input device that combines the pointing functionality of a mouse or stylus with the ability to generate physical forces that the user can feel through their hand. Unlike a standard mouse that provides no tactile information about screen content, a haptic pointing device can…

Haptic Rendering(also: Haptic display rendering)

The process of computing and outputting touch-based signals — forces, vibrations, textures, or friction — so that a user can perceive virtual or remote objects through the sense of touch. Haptic rendering covers kinesthetic rendering (force feedback via joysticks, exoskeletons,…

Haptic User Interface(also: Haptic UI, Haptic Interface)

A user interface that communicates information through the sense of touch, enabling users to interact with virtual or digital objects by feeling their physical properties such as shape, texture, weight, temperature, and vibration. Haptic user interfaces typically employ…

Haptic Virtual Reality(also: Haptic VR, Feelable Virtual Environment)

Haptic virtual reality refers to virtual environments that incorporate touch-based feedback, allowing users to feel virtual textures, shapes, and objects through force-feedback devices. Unlike visual-only VR, haptic VR provides tactile and kinaesthetic information — resistance,…

Impulse Engine(also: Impulse Engine 3000)

The Impulse Engine 3000 was a force-feedback haptic device manufactured by Immersion Corporation in the 1990s, used for research into haptic interfaces and virtual reality. The device featured a probe that users manipulated in three degrees of freedom (forward/backward, up/down,…

Kinaesthetic Perception(also: Kinesthetic Perception, Kinaesthesia, Kinesthesia)

The sensory awareness of the position, movement, and force of body parts, derived from receptors in muscles, tendons, and joints. In the context of haptic technology and accessibility, kinaesthetic perception provides information about the shape, weight, and spatial extent of…

Kinesthetic Perception(also: Kinesthesia, Proprioceptive Perception)

The sensory ability to perceive the position, movement, and forces acting on one's body and limbs through receptors in muscles, tendons, and joints. Kinesthetic perception encompasses awareness of limb position (proprioception), detection of movement and velocity, and sensing of…

Kinesthetic Perception(also: Kinesthesia, Kinesthetic Sense, Kinesthetic Feedback)

The sensory awareness of body position, movement, and force through receptors located in muscles, tendons, and joints. In assistive technology, kinesthetic feedback is a component of haptic interaction where users perceive the position of their limbs and the forces applied to…

Mediated Social Touch(also: Remote Touch, Tele-touch, Haptic Telepresence)

The use of haptic technology to simulate or communicate social touch gestures — such as stroking, squeezing, patting, or hugging — between people who are physically separated. Mediated social touch systems encode touch from one person and reproduce it on a remote partner's body…

Mid-Air Ultrasound Haptics(also: Ultrasound Haptics, Airborne Ultrasound Tactile Display, AUTD)

A non-contact haptic technology that uses phased arrays of ultrasonic transducers to focus acoustic radiation pressure onto a user's skin, producing tactile sensations in mid-air without any worn or held device. By modulating the intensity, focal-point location, and trajectory…

Music Haptics(also: Musical Haptics, Haptic Music)

The use of touch-based feedback — including vibrations, textures, and force — to convey musical information such as pitch, tempo, timbre, articulation, dynamics, and rhythm. Music haptics draws on the fact that haptic receptors in the skin, muscles, and joints naturally relay…

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…

Novint Falcon

A consumer-grade 3D haptic input device originally marketed for gaming that has been widely adopted in accessibility research for providing force feedback to people with visual impairments. The device features a grip attached to three arms that can exert forces in three…

PHANTOM(also: PHANTOM Omni, PHANTOM Desktop, SensAble PHANTOM)

A family of force-feedback haptic devices originally developed by SensAble Technologies (now part of 3D Systems). PHANTOM devices use a pen-like stylus that users grasp while motors apply forces to create the sensation of touching virtual objects or being guided along…

Pantograph(also: Haptic Pantograph)

A haptic input device that allows users to explore a two-dimensional surface by physically moving a stylus or finger pad across an exploration area, while receiving tactile feedback from an attached tactile display. In accessibility applications, the pantograph enables people…

Peltier Module(also: Peltier Device, Thermoelectric Module, TEC Module)

A Peltier module is a thermoelectric device that creates a temperature difference when electrical current is applied, with one side heating up and the other cooling down. In assistive technology, flexible Peltier modules are used to provide thermotactile feedback — controlled…

Phantom Sensation(also: Phantom Vibration, Vibrotactile Illusion)

A phantom sensation is a perceptual illusion in which two vibrotactile actuators stimulating the skin simultaneously create the feeling of a single vibration at a point between them. By varying the amplitude and frequency of each actuator, the perceived location of the phantom…

Pin Array Display(also: Pin Matrix Display, Tactile Pin Display)

A type of tactile display technology that uses an array of individually controllable pins that can be raised or lowered to create tactile patterns, textures, and graphics. Pin array displays are used in 2D tactile displays to present graphical information such as diagrams,…

Pseudo-Attraction Force

A haptic illusion technique that creates the sensation of being pulled or pushed in a specific direction by exploiting the nonlinear relationship between physical and perceived acceleration. The technique uses asymmetric oscillation: a strong, brief acceleration in the intended…

Sensory Saltation(also: Cutaneous Rabbit Effect, Tactile Saltation)

A perceptual phenomenon in which a series of rapid taps delivered at discrete locations on the skin are perceived as a continuous movement or hopping sensation across the surface between the tap points. In assistive technology, sensory saltation is exploited in haptic interfaces…

Shape Display(also: 2.5D Shape Display, Pin Display, Tactile Shape Display)

A physical computing device consisting of a grid of motorised pins that can be raised and lowered to create dynamic tactile relief surfaces. Shape displays render digital 3D content as physical topographies that users can explore by touch, providing real-time haptic feedback…

Skin Stretch Display(also: Skin Stretch, Lateral Skin Deformation Display, STReSS)

A type of haptic display technology that produces tactile feedback by laterally stretching the skin of the user's fingertip, rather than using raised pins or vibration. Skin stretch displays typically use arrays of small actuators (such as piezoelectric bending motors) that…

Spatio-Temporal Modulation(also: STM)

A rendering technique used in mid-air ultrasound haptics in which a single focal point is moved rapidly along a closed trajectory (commonly circular) while its intensity is modulated over time. When the trajectory is swept fast enough (typically tens to hundreds of Hz), the skin…