Bradshaw J L, Willmott C J, Umiltà C, Phillips J G, Bradshaw J A, Mattingley J B
Department of Psychology, Monash University, Clayton, Victoria, Australia.
Psychol Res. 1994;56(3):170-8. doi: 10.1007/BF00419704.
The role of attention and the resolution of coding conflicts in hand-hemispace spatial-compatibility effects was examined in a precueing experiment in which visual and vibrotactile precues, with various stimulus-onset asynchronies (SOAs), were presented in blocked and random order. It was expected that precues at the shorter SOAs would fail to facilitate the shifting of attention, as they occur too close to the imperative stimulus to be informative. The task would therefore approximate one of choice reaction time (RT), resulting in a hand-hemispace spatial-compatibility effect. Conversely, the longer SOAs would provide the subject with sufficient time in which to shift attention fully, and would therefore result in a task more like that of simple reaction time (SRT). It was expected that the hand-hemispace spatial-compatibility effect would then be absent. As was expected, this effect was present at the shorter SOAs, and absent at the longer SOAs. In Experiments 2 and 3, provision of a visual precue further facilitated attentional deployment, as did blocking the presentation of various SOAs in Experiment 3. Vibrotactile and visual precues did not differ in their ability to direct attention, implying that these modalities orient attention and precue location in essentially similar ways. These findings are discussed within the context of the mechanisms though to underlie the time course of spatial compatibility and the dissipation of a fading trace of interfering spatial codes.
在一项预提示实验中，研究了注意力的作用以及编码冲突的解决在手部半空间空间兼容性效应中的情况。在该实验中，视觉和振动触觉预提示以不同的刺激起始异步时间（SOA）呈现，呈现顺序为分组和随机两种。预计较短SOA的预提示无法促进注意力的转移，因为它们出现的时间距离指令性刺激太近，无法提供信息。因此，该任务将接近选择反应时（RT）任务之一，从而产生手部半空间空间兼容性效应。相反，较长的SOA将为受试者提供足够的时间来充分转移注意力，因此将导致更类似于简单反应时（SRT）的任务。预计届时手部半空间空间兼容性效应将不存在。正如预期的那样，这种效应在较短的SOA时出现，而在较长的SOA时不存在。在实验2和实验3中，提供视觉预提示进一步促进了注意力的部署，实验3中对各种SOA的分组呈现也有同样效果。振动触觉和视觉预提示在引导注意力方面的能力没有差异，这意味着这些模态以基本相似的方式引导注意力和预提示位置。在空间兼容性时间进程以及干扰性空间编码的消退痕迹消散的潜在机制背景下，对这些发现进行了讨论。
