Glossary

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NASA Task Load Index(also: NASA-TLX, TLX)

A widely used subjective workload assessment tool developed by NASA that measures perceived workload across six dimensions: mental demand, physical demand, temporal demand, performance, effort, and frustration. In accessibility research, NASA-TLX is frequently employed to…

Near Visual Acuity(also: NVA, Near Acuity)

A measure of the eye's ability to resolve fine detail at a close distance, typically tested at 40 centimetres. Near visual acuity is particularly important for tasks involving reading, handheld device use, and close-up work. It is commonly measured using Snellen notation (e.g.,…

Neck Range of Motion(also: Cervical Range of Motion, Neck ROM)

The extent to which a person can move their head and neck through three planes of rotation: flexion and extension (nodding forward and backward), axial rotation (turning left and right), and lateral bending (tilting ear toward shoulder). Normal active neck range of motion varies…

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…

Normative Language(also: Normativity in Assessment)

Language in assessment tools, questionnaires, or descriptions that implicitly establishes neurotypical or non-disabled experience as the standard against which all responses are measured. In emotional dysregulation measures, normative language includes loaded adjectives like…

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