Glossary

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AAC Abandonment(also: AAC Device Abandonment, AT Abandonment)

The widespread phenomenon of users discontinuing their use of augmentative and alternative communication (AAC) devices, particularly common among people with aphasia. Abandonment is driven by multiple factors including poor personalization and difficulty customizing devices to…

Acoustic Phonetics

The branch of phonetics concerned with the physical properties of speech sounds, including their production, transmission, and perception as acoustic signals. Acoustic phonetics uses techniques such as spectral analysis, formant tracking, and landmark detection to characterize…

Aided Language Stimulation(also: Aided Language Modeling, Aided Language Input, ALgS)

A communication intervention technique in which a conversation partner models language on an AAC device while speaking, pointing to symbols on the learner's communication system as they talk. This includes describing their own actions, narrating the learner's actions, providing…

Anomia(also: Word-finding difficulty, Anomic aphasia)

Anomia is a language impairment characterized by difficulty retrieving words during speech, particularly the names of objects, people, or actions. It is the most common symptom across all types of aphasia and can also occur as a standalone condition (anomic aphasia). In…

Aphasia Severity Rating(also: ASR Score, Aphasia Severity Rating Scale)

A clinician-administered ordinal scale, part of the Boston Diagnostic Aphasia Examination, indicating the severity of a person's aphasia on a 0-5 range where 0 indicates no usable speech or comprehension and 5 indicates minimal residual difficulties barely apparent to a…

Apraxia(also: Apraxia of Speech, Childhood Apraxia of Speech, CAS)

A motor speech disorder in which the brain has difficulty coordinating the muscle movements needed to produce speech, despite the muscles themselves not being weak. The person knows what they want to say but their brain has difficulty planning and sequencing the precise…

Articulation(also: Speech Articulation, Articulation Skills)

The physical production of speech sounds through coordinated movement of the articulators—tongue, lips, teeth, palate, jaw, and respiratory system. Articulation disorders occur when a person has difficulty producing specific speech sounds correctly, which may involve…

Articulation Disorder(also: speech sound disorder, phonological disorder)

A speech impairment characterized by difficulty producing speech sounds or phonemes correctly. Articulation disorders are classified into three categories: organic (caused by hearing loss or structural abnormalities), motor (caused by neurological conditions affecting motor…

Auditory Comprehension(also: Listening Comprehension)

The cognitive and linguistic ability to understand spoken language in real time, including recognising words, parsing grammar, holding clauses in working memory, and integrating meaning across sentences. Frequently impaired in people living with aphasia, age-related hearing…

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