dwellclick

Dwellclick, or dwell-click, is a method of initiating a mouse click without pressing a button by moving the cursor over a target and then maintaining it there for a predetermined period of time, known as the dwell time. When the dwell period expires, a click event is triggered automatically. This technique is commonly used in assistive technology to enable computer control for users with limited motor function or for input methods that rely on eye-tracking, head tracking, or switch interfaces.

Mechanism and variations: Dwell click relies on a timer that starts when the cursor or gaze rests on an element. If the cursor remains within the target for the configured dwell duration, the system generates a mouse click. Some implementations offer different modes, such as single-click, double-click, or drag-onenforcement, and may include options to cancel or extend the dwell to reduce accidental activations. Dwell time is typically adjustable to balance speed and accuracy.

Context and usage: Dwell clicking is offered as a built-in accessibility feature in many operating systems and as software extensions for specialized input devices. It is particularly useful for individuals who cannot use traditional pointing devices and for interfaces that rely on gaze or other non-traditional input methods. It can be combined with other accessibility tools, such as on-screen keyboards or eye-tracking systems, to enhance overall computer control.

Limitations and alternatives: Dwell clicking can be slower than manual clicking and prone to accidental activations if the cursor drifts. Alternatives include keyboard shortcuts, voice control, traditional pointing devices, or gaze-based interfaces that use explicit selections rather than dwell timing.