Aphasia Impact Questionnaire
Aphasia Impact Questionnaire (AIQ) · Also known as: AIQ, Aphasia Impact Scale
The Aphasia Impact Questionnaire (AIQ), most commonly administered as the Stroke and Aphasia Quality of Life Scale (SAQOL-39), is a comprehensive 39-item self-report measure of health-related quality of life in adults with aphasia following stroke or acquired brain injury. Developed by Hilari and colleagues (2003), AIQ assesses communication function, psychosocial well-being, physical health, and social participation—capturing the multidimensional burden of aphasia on daily life beyond linguistic deficits alone.
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When to use it
AIQ/SAQOL-39 is appropriate for all adults with aphasia (post-stroke, traumatic brain injury, progressive neurological disease) to establish baseline quality-of-life impact and guide comprehensive rehabilitation planning. Administer at baseline to identify psychosocial burden and guide multidisciplinary intervention (speech therapy, psychology, social work). Repeat at 8–12 weeks during inpatient/intensive rehabilitation and every 12 weeks during outpatient therapy to document quality-of-life improvement alongside traditional linguistic outcome measures. Particularly valuable in research comparing aphasia rehabilitation approaches (individual vs. group therapy, face-to-face vs. telehealth, therapy intensity) because patient-reported outcomes are increasingly required alongside clinician-rated linguistic measures. Also useful for identifying patients with high psychosocial burden (low Psychosocial subscale) who may benefit from concurrent cognitive-behavioral therapy, peer support groups, or family counseling.
Strengths & limitations
- Multidimensional quality-of-life assessment: covers communication, psychosocial, physical, and social domains relevant to aphasia impact; avoids single-dimension focus that misses important aspects of recovery (e.g., linguistic improvement without psychosocial recovery).
- Patient-centered perspective: captures subjective well-being and functional impact directly from person with aphasia; aligns with International Classification of Functioning, Disability, and Health (ICF) framework distinguishing impairment, activity limitation, and participation restriction.
- Strong psychometric properties: internal consistency (Cronbach's α 0.70–0.90 across domains), test-retest reliability (ICC > 0.80), and construct validity across diverse aphasia severity levels and etiologies well-established; recommended by speech-language pathology professional organizations.
- Responsive to intervention: AIQ/SAQOL-39 improves with speech-language therapy, group programs (Supported Communication Groups, aphasia clubs), and community reintegration; sensitive to both acute recovery (early post-stroke) and longer-term psychosocial adaptation.
- Accessible for severe aphasia: pictorial/simplified response formats enable completion by individuals with severe expressive or receptive aphasia; proxy completion option (family report) allows assessment when direct self-report is impossible.
- Self-report bias and validity concerns in severe aphasia: individuals with severe receptive or cognitive impairment may not accurately understand items or consistently respond; proxy completion (family report) introduces informant bias; validation in very severe aphasia population is limited.
- Modest ceiling/floor effects: individuals with mild residual aphasia may score at ceiling (approaching 100%) on Communication subscale; individuals with very severe global aphasia may show floor effects on some items. Limited sensitivity to change in extreme severity groups.
- Interview administration burden: when used as interview (necessary for severe aphasia), administration time extends to 30–40 minutes; requires clinician training for consistent administration and may introduce interviewer bias in response interpretation.
- Limited cultural adaptation: while SAQOL-39 has been translated to multiple languages, cultural validation studies are sparse for non-English speaking populations; response patterns and quality-of-life constructs may vary across cultures (e.g., individualistic vs. collectivist perspectives on social participation).
- Does not measure linguistic impairment directly: AIQ/SAQOL-39 assesses perceived communication function, not objective language abilities (word-finding accuracy, comprehension, grammar); high quality-of-life Communication subscale score does not guarantee linguistic recovery (reflects adaptation and compensatory strategy success).
Frequently asked
Can I use AIQ/SAQOL-39 for someone with severe aphasia who cannot read or reliably communicate responses?
Yes—use interview format with visual response options (5-point faces scale, color-coded response cards, hand signals for yes/no). The clinician reads items aloud and supports response expression through multi-modal cuing (verbal repetition, gestural options). Alternatively, a family member familiar with the person's preferences can complete a proxy version. Document that proxy version was used; acknowledge that proxy ratings may differ from person's own perception. Ideally, use both direct and proxy versions and discuss discrepancies with family.
How do I interpret a high Communication subscale score in someone with severe expressive aphasia?
High Communication score despite severe aphasia indicates the person feels effective at communicating their meaning despite linguistic limitations—they have developed or received training in compensatory strategies (gestures, drawing, AAC device) or have supportive communication partners. This is positive (good adaptation) but does not mean language recovery occurred. Conversely, low Communication score in someone with mild-moderate aphasia suggests linguistic ability alone is insufficient; anxiety, shame, or learned helplessness prevent them from attempting communication. These patterns guide intervention: former may need communication strategy reinforcement; latter needs confidence-building and cognitive-behavioral therapy alongside speech therapy.
What minimum improvement on AIQ/SAQOL-39 indicates clinically meaningful change?
Minimal clinically important difference (MCID) is approximately 10–15 points on overall 0–100 scale (or 5–8 points on individual subscales). However, context matters: improvement from 15 to 25 may be more significant than improvement from 85 to 95 (floor effect is more meaningful). Track change at multiple time points (baseline, 8 weeks, discharge) rather than relying on single endpoint.
Is AIQ/SAQOL-39 appropriate for progressive aphasia (primary progressive aphasia) or only acquired stroke aphasia?
AIQ/SAQOL-39 was initially validated in stroke aphasia but is increasingly used in primary progressive aphasia (PPA) populations. Interpretation differs: in stroke, AIQ improvement indicates recovery; in progressive aphasia, stable or slowly declining AIQ scores indicate slowing of decline or successful psychological adaptation (optimization rather than recovery). Use AIQ for monitoring in PPA but pair with cognitive/language testing to contextualize quality-of-life trends within disease progression.
Sources
- Hilari, K., Byng, S., Lamping, D. L., & Smith, S. C. (2003). Stroke and Aphasia Quality of Life Scale–39 (SAQOL-39): Evaluation of Acceptability, Reliability, and Validity. Stroke, 34(8), 1944–1950. DOI: 10.1161/01.str.0000081987.46660.ed ↗
- Hersh, D., Worrall, L., & Simmons-Mackie, N. (2012). How Do People With Aphasia View Quality of Life? Aphasiology, 26(2), 141–160. link ↗
- Cruice, M., Worrall, L., & Hickson, L. (2006). Quantifying Aphasic People's Health-Related Quality of Life. International Journal of Language & Communication Disorders, 41(6), 713–730. link ↗
How to cite this page
ScholarGate. (2026, June 3). Aphasia Impact Questionnaire (AIQ). ScholarGate. https://scholargate.app/en/speech-language-pathology/aphasia-impact-questionnaire
Which method?
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