Glossary

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Degrees of Freedom(also: DoF, 3DoF, 6DoF)

In virtual and extended reality, degrees of freedom refers to the number of independent movement axes available to a user within a virtual environment. Three degrees of freedom (3DoF) allows rotational head tracking only — looking up/down, left/right, and tilting — which is…

Diegetic Sound(also: In-World Sound, Source Sound)

Sound that originates from a source within the narrative world of a game, film, or virtual reality environment — meaning the characters or inhabitants of that world could theoretically hear it. Examples include a phone ringing, a dog barking, footsteps, a crackling fire, or a…

Diegetic Sound(also: In-Game Sound, In-World Sound)

Sound that originates from within the world of a game, film, or virtual environment—sounds that characters within that world could theoretically hear. In gaming and VR, diegetic sounds include environmental audio (footsteps, ambient noise, machinery), character dialogue, and…

Digital Layer Accessibility

The dimension of VR accessibility concerned with user representation through avatars and the design of virtual worlds and environments. On the avatar side, this includes whether users can create avatars that represent their disabilities, assistive devices, and physical…

Disability Representation in VR

The portrayal and inclusion of disabilities in virtual reality environments, encompassing avatar design, assistive device depiction, and environmental features that acknowledge disability. Research shows this is a deeply personal and context-dependent issue: disabled users often…

Disability Signifier(also: DS, Disability Marker)

A visual or auditory feature incorporated into a digital avatar or virtual representation that indicates a disability, such as a virtual wheelchair, walking cane, prosthetic limb, or hearing aid. Disability signifiers allow people with disabilities to express their disability…

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