nongrasping

Nongrasping is a term used in various disciplines to describe methods, devices, or behaviors that do not require a traditional hand grasp to interact with an object or system. It is not a single established technical term with a universal definition; rather, it covers approaches aimed at bypassing or removing the need to form a grip.

Contexts include robotics and manipulation: non-grasping manipulation uses tools and forces other than a firm grip to move, support, or position objects, such as suction-based grippers, magnetic or electroadhesive manipulation, or indirect pushing and sliding. In humans and assistive technology, nongrasping interfaces seek input or control without hand gripping, using modalities like eye tracking, voice commands, gesture without contact, or large-button interfaces that do not require fine motor grip strength.

In rehabilitation, nongrasping tasks can be used to accommodate limited hand function, enabling interaction through larger contact surfaces or alternative input channels while training coordination and control. Benefits include accessibility and reduced dexterity demands; limitations may involve lower precision, slower task performance, or physical constraints of the non-grasping approach.

Because nongrasping is not a standardized field term, users should interpret it in context and examine how it contrasts with grasp-based methods. See also non-contact manipulation, grasp, prosthetic control, assistive interfaces.