Glossary

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Oligodactyly

A congenital condition in which a person is born with fewer than the typical number of fingers or toes. The condition varies widely in presentation — some individuals may have fewer digits on one hand or both, and the remaining digits may differ in size, strength, or dexterity.…

On-Screen Keyboard(also: Virtual Keyboard, Software Keyboard, OSK)

A software application that displays a visual representation of a keyboard on the computer screen, allowing users to type by selecting keys with a pointing device, head tracker, eye gaze system, or switch. On-screen keyboards are essential assistive technology for people who…

One-Handed Input(also: Single-Handed Operation, One-Handed Operation)

One-handed input refers to interaction techniques and interface designs that can be operated using a single hand, accommodating users who have limited use of one limb due to amputation, hemiplegia, stroke, cerebral palsy, or other physical conditions. One-handed input methods…

Overshoot(also: Cursor Overshoot, Target Overshoot)

In pointing device interaction, the phenomenon where the cursor travels beyond the intended target before the user can stop it, requiring corrective movements back toward the target. Overshoot is measured as the maximum distance traveled beyond the target as a percentage of the…

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