correctivepointing

Corrective pointing is a user interface technique in which a user initially directs a pointing input toward a target region and subsequently issues one or more corrective pointing actions to refine the selection. The approach aims to reduce the precision burden on the user by allowing coarse initial aim followed by refinement, improving targeting in situations with closely spaced options or small targets.

Mechanism and interaction models typically involve a first pointing action that places the cursor or focus near the intended item. If multiple candidates are nearby, the user can perform a correction gesture, such as another pointing motion, a drag, or a second click, to indicate the final target. The system treats the correction as disambiguation input and updates the selection, often snapping to the nearest candidate within a refinement zone or adapting the candidate set as the gesture continues.

Applications for corrective pointing include dense menus, maps, diagram editors, and virtual or augmented reality interfaces, where precise aiming can be difficult. It is applicable across input modalities such as touch, pen, mouse, and eye-tracking, and can be used in conjunction with dwell or gesture-based selection methods.

Advantages of corrective pointing include improved accuracy without requiring high initial precision, potential accessibility benefits, and support for smaller targets. Challenges include added interaction steps, potential user confusion during the refinement process, and a need for robust feedback and predictable behavior to maintain learnability and efficiency.

Design considerations emphasize clear visual and haptic feedback during refinement, straightforward cancellation or undo options, and consistent behavior across input modalities. Practical implementations often show candidate targets, highlight the refinement region, and provide responsive snapping with low latency.