Switch access scanning¶
An indirect assistive selection method that presents choices in a predictable sequence or grouping and lets a user activate one or more switches when the desired item is highlighted or announced.
Core Idea¶
Scanning supports access with limited voluntary movement through linear, row-column, group-item, directed, step, or automatic patterns whose timing, feedback, error correction, and layout must be individualized. A controller advances an indicator across a selection set, visual or auditory feedback exposes the current target, switch activation selects or changes traversal, and the interface confirms, cancels, or repairs the choice. The abstraction is therefore identified by a declared carrier, a transformation or constraint over that carrier, and an invariant that tells an analyst whether the named structure is genuinely present.
Scope of Application¶
Switch access scanning belongs to assistive technology and augmentative communication and is useful where the analyst can specify the typed assistive technology and augmentative communication carrier, defining objects and relations, parameters, conventions, evidence, boundary cases, and comparison targets, then evaluate the user and access needs, selection set and layout, scan pattern and direction, automatic or step mode, switch count and action, dwell and timing, sensory feedback, prediction, error correction, fatigue, accuracy, throughput, and personalization are explicit.
Clarity¶
The abstraction clarifies a crowded vocabulary by making the user and access needs, selection set and layout, scan pattern and direction, automatic or step mode, switch count and action, dwell and timing, sensory feedback, prediction, error correction, fatigue, accuracy, throughput, and personalization are explicit the center of the account. A claim should name the carrier, the governing operation or relation, the applicable assumptions, and the recognition test.
Manages Complexity¶
Without the abstraction, an analyst must reason directly over many local details: the carrier roles, admissibility assumptions, competing conventions, derived invariants, boundary cases, and proof or validation obligations specific to Switch access scanning. Switch access scanning compresses them into the roles in the structural signature. That compression permits comparison across instances without erasing the variables that determine validity. It also exposes which details may be varied safely and which are constitutive.
Abstract Reasoning¶
- Identify the carrier. State what the elements, states, objects, or observations are: the typed assistive technology and augmentative communication carrier, defining objects and relations, parameters, conventions, evidence, boundary cases, and comparison targets. Reject examples whose alleged carrier belongs to a different problem. 2.
Knowledge Transfer¶
Knowledge transfers strongly among subfields of assistive technology and augmentative communication because they reuse the typed assistive technology and augmentative communication carrier, defining objects and relations, parameters, conventions, evidence, boundary cases, and comparison targets, A controller advances an indicator across a selection set, visual or auditory feedback exposes the current target, switch activation selects or changes traversal, and the interface confirms, cancels, or repairs the choice., and type the carrier, state every parameter and convention in the definition, test that the user and access needs, selection set and layout, scan pattern and direction, automatic or step mode, switch count and action, dwell and timing, sensory feedback, prediction, error correction, fatigue, accuracy, throughput, and personalization are explicit, compare the nearest accepted identity, and report counterexamples, uncertainty, and limiting cases.
Relationships to Other Abstractions¶
Current abstraction Switch access scanning Domain-specific
Parents (1) — outgoing typed relations
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Switch access scanning is a kind of Selection Prime
It remains its own entry because its identity is fixed by the user and access needs, selection set and layout, scan pattern and direction, automatic or step mode, switch count and action, dwell and timing, sensory feedback, prediction, error correction, fatigue, accuracy, throughput, and personalization.
Hierarchy path (1) — routes to 1 parentless root
- Switch access scanning → is a kind of Selection
Neighborhood in Abstraction Space¶
Switch access scanning sits in a moderately populated region (52nd percentile for distinctiveness): it has near-neighbors but no dense thicket of look-alikes.
Family — Interface & Interaction Design Methods (20 abstractions)
Nearest neighbors
- Natural user interface — 0.87
- Crossing-based interface — 0.86
- User interface design — 0.85
- Human action cycle — 0.85
- Task-focused interface — 0.85
Computed from structural-signature embeddings · 2026-10-25