An automatic Drag-and-Drop assistive program developed to assistive people with developmental disabilities to improve Drag-and-Drop efficiency.

Two adults with developmental disabilities learned to drag-and-drop icons on a computer. The team built a simple program called ADnDAP. It snaps the icon into place when the cursor gets close to the target.

Researchers used a multiple-baseline design. They tracked how many drops each person completed per session.

Both users got faster and more accurate right after the tool was turned on. Their gains stayed high when the researchers checked later.

Shih (2012) later swapped the auto-snap for a mouse-wheel poke. That newer tool lets users pick any drop spot, not just a fixed box. It also shows bigger gains, so it has mostly replaced the 2010 version.

Shih (2011) tested a middle step: mouse-wheel control but still fixed targets. The 2010 auto-tool is easier to start with, while the wheel versions suit clients who can only twitch a finger.

Shimizu et al. (2006) taught pointing without special software. Their three-step prompting package works for preschoolers, but the ADnDAP line gives older users a faster lane once basic mouse contact exists.

If you have a teen or adult who can slide a mouse but misses the drop zone, turn on Windows snap-to or download a free auto-snap utility. You will see immediate drag-and-drop success and less frustration. When the client is ready for more freedom, move to the mouse-wheel tools shown in the later papers.