Functional solutions and social identity models

5 min read · BoK 1A· p. 7–7

Learning objectives (3)

Relate the functional solutions model to accessibility and AT work
Explain the social identity model through the lens of Deaf culture
Distinguish both models from the medical and social models

Two practical models

The models covered in earlier lessons — medical, social, biopsychosocial, economic, and charity — are largely explanatory: they describe what disability is and where responsibility lies. This lesson introduces two more models that are particularly actionable for accessibility practitioners: the functional solutions model, which drives the design of assistive technology and accessible products, and the social identity model, which shapes how some communities understand their relationship to disability. (BoK p. 7)

The functional solutions model

The functional solutions model shifts attention away from “What is wrong with the person?” toward “What functional tasks does the person need to accomplish, and what solutions will enable that?” It is, in practice, the dominant model in assistive technology research and product development. (BoK p. 7)

Core features:

The starting point is a functional limitation — a specific thing a person cannot do — not a diagnosis or a social barrier.
The goal is a practical solution: a technology, an adaptation, or a design choice that removes the limitation.
Solutions developed for disability often drive broader innovation (the “curb-cut effect”): voice control, predictive text, and closed captioning all began as accessibility features and became mainstream. (BoK p. 7)

Why this model matters for the CPACC

The BoK explicitly identifies the functional solutions model as the lens most relevant to accessibility work. When you are writing an accessibility evaluation report, recommending assistive technology, or designing an accessible interface, you are applying this model: identifying functional limitations and proposing solutions.

The social identity model takes a fundamentally different position: for some communities, disability is not a deficit to be solved or a barrier to be removed — it is a source of identity, culture, and community. The most prominent example is the Deaf community. (BoK p. 7)

Many Deaf people — the capital D is a conventional marker of cultural identity rather than audiological status — identify as members of a linguistic and cultural minority. Sign language is their first language; Deaf history, art, and social norms constitute a rich culture. From this perspective, cochlear implants — especially for Deaf children — are controversial because they can be seen as attempting to erase a valid identity rather than to correct a deficit. (BoK p. 7)

Key features of the social identity model:

Disability or difference is a valid form of human diversity.
Community membership and cultural affiliation are central to well-being.
Medical or technological “correction” may be rejected as a threat to cultural identity.
The appropriate societal response is recognition and inclusion of diverse identities, not normalization.

Real-world example

An accessibility consultant is evaluating two users who both cannot use a standard keyboard: one has cerebral palsy affecting fine motor control, and the other has a repetitive strain injury. The consultant recommends the same switch-access interface for both, without asking either user to disclose their diagnosis. This is the functional solutions model in practice — the shared functional limitation (cannot use keyboard) drives the solution, not the underlying condition.

Key terms

Functional solutions model: The view that disability problems are best addressed through practical solutions — technology, design, adaptations — that reduce functional limitations. (BoK p. 7)
Functional limitation: A restriction in a person's ability to perform a task, independent of diagnosis — the starting point for the functional solutions model. (BoK p. 7)
Innovation: In the functional solutions model, accessibility work drives broader technological innovation; solutions for disability often benefit everyone. (BoK p. 7)
Social identity model: The view that disability (particularly Deafness) is a social and cultural identity to be celebrated, not a medical deficit to be corrected. (BoK p. 7)
Cultural affiliation: Membership in a community sharing language, norms, and values — central to the social identity model's account of Deaf culture. (BoK p. 7)
Deaf culture: The community of Deaf people who share sign language, history, and values and who often reject the medical framing of deafness as a deficit. (BoK p. 7)

Check yourself

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According to the CPACC BoK, which model of disability is most directly applied when an accessibility professional identifies a user's specific functional limitation and recommends an assistive technology solution to address it?

a) Social model
b) Medical model
c) Functional solutions model — correct answer
d) Social identity model

Explanation: The functional solutions model is explicitly identified in the BoK as the framework underlying accessibility and AT work. Rather than asking "What is the person's diagnosis?" or "What barriers has society created?", the functional solutions model asks "What specific task cannot be performed, and what technology or design change will enable it?" This diagnosis-agnostic approach is what makes the model practical and scalable across diverse disability types (BoK p. 7).

Many members of the Deaf community oppose cochlear implants for Deaf children, arguing that deafness is not a medical deficit to be corrected. Which model of disability most directly underlies this perspective?

a) Medical model
b) Biopsychosocial model
c) Social model
d) Social identity model — correct answer

Explanation: The social identity model, exemplified by the Deaf community, holds that some disabilities are cultural identities rather than medical deficits. Deaf culture — with its own language (sign language), history, values, and community — is the BoK's primary example. From this perspective, deafness is not a problem to be fixed; it is a form of human diversity to be recognized and respected. This directly informs why many Deaf community members object to cochlear implants, especially for children who have not yet formed their own cultural identity (BoK p. 7).

An accessibility team evaluates two users who both cannot use a standard keyboard: one has cerebral palsy affecting fine motor control, and the other has a repetitive strain injury. The team recommends the same switch-access solution for both, without requiring either user to disclose their diagnosis. Which feature of the functional solutions model does this illustrate?

a) The model's emphasis on human rights as the justification for providing accommodations
b) The model's requirement that solutions be certified by medical professionals before deployment
c) The model's focus on diagnosis-independence: solutions are matched to functional limitations, not to medical conditions — correct answer
d) The model's principle that AT solutions should always be developed collaboratively with Deaf and cultural minority communities

Explanation: The functional solutions model's defining feature is that it operates at the level of functional limitations rather than diagnoses. Two users who cannot use a standard keyboard — regardless of why — share the same functional limitation, and the same solution (switch access) may serve both. This diagnosis-independence is why the functional model scales well across the diversity of disability types an accessibility professional encounters. It also avoids stigma: users need not disclose sensitive health information to receive the accommodations they need (BoK p. 7).

Sources

BoK references

Section 1A — IAAP CPACC Body of Knowledge v4.0 (Oct 2023), p. 7