Watt S J, Bradshaw M F, Rushton S K
Department of Psychology, University of Surrey, Guildford, Surrey GU2 7XH, UK.
Exp Brain Res. 2000 Dec;135(3):411-6. doi: 10.1007/s002210000545.
It has been observed that wearing goggles that restrict the field of view (FOV) causes familiar objects to appear both smaller and nearer. To investigate this further, we examined the effect of a range of field sizes (4 degrees, 8 degrees, 16 degrees, 32 degrees and 64 degrees) on estimates of object distance and object size used to control reaching and grasping movements of binocular observers. No visual or haptic feedback was available during the experiment. It was found that, as the FOV was decreased, the distance reached by subjects also decreased, whereas the size of their grasp was unaffected. In a second experiment, we compared reaching and grasping responses under binocular and monocular conditions for 8 degrees and 64 degrees field sizes and show that the effects of FOV do not result from the progressive loss of binocular information. We conclude that reducing the FOV produces substantial and dissociable effects on reaching and grasping behaviour and that field size must be taken into account in any context where visuo-motor performance is important.
据观察，佩戴限制视野（FOV）的护目镜会使熟悉的物体看起来更小且更近。为了进一步研究这一现象，我们考察了一系列视野大小（4度、8度、16度、32度和64度）对双眼观察者用于控制伸手和抓握动作的物体距离估计和物体大小估计的影响。实验过程中没有视觉或触觉反馈。结果发现，随着视野的减小，受试者伸手的距离也减小，而抓握的大小不受影响。在第二个实验中，我们比较了8度和64度视野大小下双眼和单眼条件下的伸手和抓握反应，结果表明视野的影响并非源于双眼信息的逐渐丧失。我们得出结论，减小视野会对伸手和抓握行为产生显著且可分离的影响，并且在任何视觉运动表现很重要的情况下，都必须考虑视野大小。
