Aphasia & Cognition

WAB-R: What It Measures

Western Aphasia Battery–Revised

Quick answer

The WAB-R measures language function after brain injury in adults and classifies aphasia type. Four oral language subtests — spontaneous speech, auditory comprehension, repetition, and naming — generate an Aphasia Quotient that indexes severity, while the classification taxonomy identifies Broca's, Wernicke's, conduction, global, anomic, and transcortical aphasias.

The WAB-R is the classification workhorse of adult aphasia assessment. If a Praxis item hands you a patient with fluent, paraphasic speech, poor comprehension, and poor repetition and asks what the SLP should conclude, the underlying framework is the WAB-R taxonomy.

WAB-R at a glance

Full name: Western Aphasia Battery–Revised
Publisher: Pearson
Domain: Aphasia & Cognition
Age range: Adults
Administration time: 30–45 minutes for the bedside/oral portion; 1–2 hours for the full battery
Format: Standardized adult aphasia battery with oral language, reading, writing, praxis, and construction sections
Score types: Aphasia Quotient (AQ), Language Quotient (LQ), Cortical Quotient (CQ), Subtest raw and criterion scores

What the WAB-R measures

Spontaneous speech — information content and fluency
Auditory verbal comprehension — yes/no questions, auditory word recognition, sequential commands
Repetition of words, phrases, and sentences
Naming and word finding — object naming, word fluency, sentence completion, responsive speech
Reading, writing, apraxia, and constructional/visuospatial tasks in the extended battery

Subtests and sections

Spontaneous Speech: Conversational questions and picture description scored for fluency and information content.
Auditory Verbal Comprehension: Yes/no questions, single-word recognition, and sequential commands of increasing length.
Repetition: Repeating words through long, low-frequency sentences; the key discriminator for conduction and transcortical types.
Naming and Word Finding: Confrontation naming, word fluency, sentence completion, and responsive speech.
Reading and Writing: Comprehension of sentences and commands, writing to dictation, and written naming.
Apraxia and Constructional tasks: Limb, oral, and instrumental praxis plus drawing, block design, calculation, and Raven's matrices.

The three-question classification grid

Aphasia classification on the WAB-R comes down to three binary judgments: is speech fluent, is auditory comprehension relatively intact, and is repetition relatively intact. Nonfluent + poor comprehension + poor repetition is global aphasia. Nonfluent + good comprehension + poor repetition is Broca's. Fluent + poor comprehension + poor repetition is Wernicke's. Fluent + good comprehension + poor repetition is conduction aphasia. When repetition is spared, the transcortical family applies: transcortical motor (nonfluent, good comprehension), transcortical sensory (fluent, poor comprehension), and mixed transcortical (nonfluent, poor comprehension). Fluent, good comprehension, good repetition with word-finding trouble is anomic aphasia.

Practice this grid until it is automatic. It is one of the highest-yield structures on the entire Praxis 5331 and it recurs across assessment, treatment, and neuroanatomy items.

What the Aphasia Quotient does and does not tell you

The AQ is computed from the four oral language subtests and ranges from 0 to 100, with higher scores indicating milder impairment. It is a severity index, not a functional outcome. Two patients with identical AQs can differ enormously in communicative participation depending on communication partners, fatigue, depression, and the strategies they have learned.

Because of that gap, current practice reports AQ alongside patient-reported outcome and participation measures. Documenting only the AQ is a common critique in clinical supervision and in exam distractor sets.

Strengths

Produces both a severity index (AQ) and a syndrome classification in one administration.
Bedside version allows quick acute-care screening.
Long research history, so scores are comparable across studies and settings.
Includes praxis and nonverbal tasks that help differentiate aphasia from apraxia and cognitive-communication deficits.

Limitations

Classification categories oversimplify real patients; many people do not fit a single syndrome cleanly.
Weak on functional and conversational communication — it says little about how the person orders coffee or talks with family.
Full battery is fatiguing for acutely ill patients.
Limited sensitivity to mild, high-level language deficits and anomia in high-functioning speakers.

When clinicians use it

Establishing aphasia presence, type, and severity after stroke or brain injury.
Tracking recovery across the acute-to-chronic continuum using AQ change.
Selecting treatment approach — for example, repetition-preserved profiles suggest different targets than repetition-impaired ones.
Supplementing with functional measures such as the CADL-3 or a conversation analysis.

What the Praxis 5331 asks about the WAB-R

Memorize the fluency / comprehension / repetition grid that separates the eight classical aphasia types.
Know that intact repetition with impaired comprehension points to transcortical sensory aphasia.
Expect items pairing the WAB-R with a functional communication measure because standardized scores do not capture everyday use.

Practice assessment questions with rationales

Praxis Path pairs this reference material with scenario questions, spaced-repetition flashcards, and a timed 132-question mock exam.

See what's included Try a free practice test

FAQ

What does the WAB-R measure?

Language function after brain injury in adults — spontaneous speech, auditory comprehension, repetition, naming, plus reading, writing, praxis, and constructional skills in the extended battery.

What is the Aphasia Quotient on the WAB-R?

A 0–100 severity index derived from the four oral language subtests. Higher scores indicate milder aphasia; the AQ is used to track recovery over time.

How does the WAB-R classify aphasia types?

By combining fluency, auditory comprehension, and repetition performance into the classical taxonomy: Broca's, Wernicke's, conduction, global, anomic, and the three transcortical aphasias.

How long does the WAB-R take?

About 30–45 minutes for the oral language portion and one to two hours for the complete battery including reading, writing, and constructional tasks.