Investigators wish to evaluate the effects of adding VTF to upper limb prostheses on functional outcome measures of upper limb prosthetic users.

Investigators will perform three experiments:

1. Investigators will add vibrotactile feedback to prosthetic users during the execution of a standardized functional test and performance of simple grasping tasks, with a disruption to the normal visual feedback, and examine whether their performance and arm kinematics are improved with tactile feedback;
2. Investigators will examine the effects of adding the feedback to a prosthesis on the performance and visual attention during a dual task assignment in prosthetic users, and
3. Investigators will provide prosthetic users with the feedback, to use it at their natural surroundings for a week, and study the reported activity and satisfaction levels.

Inclusion Criteria:

• Unilateral transradial amputee
• Using a transradial myoelectric prosthesis
• Ability to follow simple instructions, understand and sign an informed consent form
• Normal or corrected eyesight

Exclusion Criteria:

• Elbow or wrist disarticulation or partial hand amputations
• Neuropathy or skin ulcers on the amputated limb