Bourke P A
Department of Psychology, Lincoln University Campus, Brayford Pool, LN6 7TS, U.K.
Q J Exp Psychol A. 1997 Nov;50(4):821-40. doi: 10.1080/713755737.
Despite its intuitive appeal, the commonly held assumption that there is some general limitation on dual-task performance has been shown to be seriously flawed (Allport 1980; Navon 1984). Central to this has been the inability to measure the attentional demands of tasks, without which there is no way to determine whether their joint demands exceed the hypothetical general limit. In the absence of such a measure, dual-task interference can always be explained by the alternative possibility that specific interference has occurred. A method is described in which the attentional demands of tasks can be measured and cross-validated by the use of two scales. Two experiments are described in which a general attentional limit is found; the measurement of attentional demand is consistent across scales and can be made at a level of precision approximating that of an interval scale.
尽管其直观上很有吸引力，但普遍认为双任务表现存在某种一般限制的假设已被证明存在严重缺陷（奥尔波特，1980年；纳冯，1984年）。这其中的核心问题在于无法测量任务的注意力需求，没有这一点就无法确定它们的联合需求是否超过假设的一般限制。在缺乏这种测量方法的情况下，双任务干扰总是可以用特定干扰发生的另一种可能性来解释。本文描述了一种方法，通过使用两个量表来测量和交叉验证任务的注意力需求。文中描述了两个实验，发现了一个一般的注意力限制；注意力需求的测量在不同量表上是一致的，并且可以达到接近区间量表的精度水平。
