Development of a new experimental device and investigate human characteristics on visual feedback control and pointing movement

In present study, we developed a pointing movement experimental device with visual feedback control function that is capable of perform the cognitive psychological procedure relate to own hand movements. It can serve to determining the human characteristics of pointing movement with or without visual feedback restriction. The main part of present device consists of a touch monitor, one set of light control glass, a relay switch electric circuit and computer. The subjects can do the pointing movement on the touch monitor and the visual feedback restriction will carry out with a combination of light control glass and relay switch. In addition, all the control and measurement can be completed by the computer. However, present device can not realize the targets overlapping on the light control glass and touch monitor by bilateral ocular, owing to the human visual characteristics. So we compared pointing movement with bilateral ocular and lateral ocular with ten subjects. The results indicate that there is no significant difference between do pointing movement with bilateral and lateral ocular. Finally, ten young subjects consented to participate in a full vision and a vision restricted pointing movement tasks with lateral ocular. The results suggest that although the visual feedback was restricted, the pointing movement depend on the index difficulty of targets.