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Glossary

Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.

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Visual Hallucination(also: AI hallucination, MLLM hallucination)
In the context of multimodal AI systems, visual hallucination refers to the generation of descriptions or responses that contain information not grounded in the actual visual input—fabricating non-existent objects, misattributing properties such as colour or size, or…

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