Local and global affordances and manual planning
Local and global affordances and manual planning
复制标题
本地和全球可供性和手动规划
DOI：
10.1007/s00221-006-0813-z
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发表时间：
2007
影响因子：
2
通讯作者：
Ed Symes
中科院分区：
文献类型：
--
作者：
L. Vainio;R. Ellis;Mike Tucker;Ed Symes
本研究旨在证明运动规划过程受到被忽视的物体主体的可视性的影响。参与者被要求根据物体（水果）的局部成分（茎）的属性选择反应手，同时他们拿着精确或强力的握持设备。一个物体主体的大小被观察到不对称的启动手选择过程。当柄是精确握持对象（例如草莓）的一部分或单独显示时，右手反应更容易。相比之下，当柄是握力物体（如苹果）的一部分时，左手反应更容易。这一数据支持了我们之前提出的观点，即不同的大脑半球在手动动作的早期规划中具有不同的作用。与精确握力规划相关的目标信息似乎主要在左半球处理，而与握力规划相关的信息似乎主要在右半球处理。在实验3中，尽管茎在空间上与果体分离，但不相关的果体对运动规划有轻微的影响。除空间分离外，当茎与果体在语义上分离时（实验4），当实验1中使用的物体被二维抽象物体取代时（实验2），启动效应完全消除。实验2、3和4表明，只有当物体的局部目标成分被分析为可抓取物体的有意义部分时，物体无关主体的可视性才会影响运动规划过程。
The present study aimed to demonstrate that motor planning processes are affected by ignored affordances of a main body of an object. Participants were asked to select the hand of response according to the property of the local component (a stalk) of the object (a fruit) while they were holding a precision or a power grip devices. The size of a main body of an object was observed to prime hand selection processes asymmetrically. Right-hand responses were facilitated when the stalk was a part of a precision grip object (e.g. a strawberry) or displayed alone. In contrast, left-hand responses were facilitated when the stalk was a part of a power grip object (e.g. an apple). This data supported our previously presented view that the different hemispheres have differential roles in the early planning of manual actions. The object information that is relevant to precision grip planning appears to be processed predominantly in the left-hemisphere whereas the information that is relevant to power grip planning appears to be processed predominantly in the right-hemisphere. In Experiment 3, the irrelevant fruit body had a slight effect on motor planning even though the stalk was spatially separated from the fruit body. The priming effect was entirely eliminated when, in addition to the spatial separation, the stalk was semantically disassociated from the fruit body (Experiment 4), and when the objects used in Experiment 1 were replaced by two dimensional abstract objects (Experiment 2). Experiments 2, 3 and 4 suggested that affordances of an irrelevant main body of an object influences motor planning processes only when the local target component of the object is analysed as a meaningful part of a graspable object.