A Logarithmic Speed-Difficulty Trade-off in Speech Production
A Logarithmic Speed-Difficulty Trade-off in Speech Production
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DOI：
10.1123/mcj.15.1.52
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发表时间：
2011-01-01
期刊：
影响因子：
1.1
通讯作者：
Mikaelian, Irina L.
中科院分区：
文献类型：
--
作者：
Latash, Mark L.;Mikaelian, Irina L.
我们探讨了图片描述任务中任务难度与言语时间之间的关系。六名以普通话为母语的人（CH组）和六名以印欧语为母语的人（IE组）以自定进度的方式对图片进行了快速准确的口头描述。这些图片总是涉及两个物体，一个盘子和三个物体之一（棍子、叉子或刀），在不同的试验中相对于盘子的位置和方向不同。每张图片都分配了难度指数。 CH 组的反应时间和言语时间都较短。所有科目的语音时间都与难度的对数转换指数呈线性关系。结果表明菲茨定律对于运动和言语任务具有普遍性，也可能适用于其他认知任务。 CH 和 IE 组之间的差异可能是由于特定的任务特征、CH 和 IE 语言的语法规则的差异以及信息传输时可能使用的语气造成的。
We explored the relations between task difficulty and speech time in picture description tasks. Six native speakers of Mandarin Chinese (CH group) and six native speakers or Indo-European languages (IE group) produced quick and accurate verbal descriptions of pictures in a self-paced manner. The pictures always involved two objects, a plate and one of the three objects (a stick, a fork, or a knife) located and oriented differently with respect to the plate in different trials. An index of difficulty was assigned to each picture. CH group showed lower reaction time and much lower speech time. Speech time scaled linearly with the log-transformed index of difficulty in all subjects. The results suggest generality of Fitts' law for movement and speech tasks, and possibly for other cognitive tasks as well. The differences between the CH and IE groups may be due to specific task features, differences in the grammatical rules of CH and IE languages, and possible use of tone for information transmission.