Heiman G W, Tweney R D
J Psycholinguist Res. 1981 Jan;10(1):3-15. doi: 10.1007/BF01067358.
A method of time compressing visual displays was devised to assess the effects of compression on the comprehension of American sign language (ASL). Two ASL narratives were visually presented to three groups of deaf ASL users. A compression group was presented narratives compressed to 50% of the duration of the normal rates. A no-compression group was presented narratives signed at normal rates. A pause groups was presented compressed narratives with blank pauses inserted so that the total time per narrative was equal to that of the no-compression versions. Following each narrative, subjects completed a written comprehension task. Comprehension in both compression and pause groups was significantly lower than in the no-compression group. Pauses did not significantly affect scores relative to compression. An additional group of deaf ASL users was presented an intelligibility task in which signs taken from the narratives were presented in isolation either with or without compression. The total number of signs correctly identified was significantly lower with compression. Decrements in comprehension were best explained as the result of cumulative decrements in sign intelligibility and not as the result of decrements in available processing time.
设计了一种时间压缩视觉显示方法，以评估压缩对美国手语（ASL）理解的影响。向三组失聪的ASL使用者以视觉方式呈现了两个ASL叙事。向一个压缩组呈现压缩至正常语速持续时间50%的叙事。向一个无压缩组呈现以正常语速签署的叙事。向一个停顿组呈现插入了空白停顿的压缩叙事，以便每个叙事的总时长与无压缩版本相同。在每个叙事之后，受试者完成一项书面理解任务。压缩组和停顿组的理解能力均显著低于无压缩组。相对于压缩而言，停顿对分数没有显著影响。向另一组失聪的ASL使用者进行了一项可懂度任务，其中从叙事中选取的手语单独呈现，有压缩或无压缩。压缩情况下正确识别的手语总数显著更低。理解能力的下降最好解释为手语可懂度累积下降的结果，而非可用处理时间减少的结果。
