Load theory of attention proposes that distractor processing is reduced in tasks with high perceptual load that exhaust attentional capacity within task-relevant processing. In contrast, tasks of low perceptual load leave spare capacity that spills over, resulting in the perception of task-irrelevant, potentially distracting stimuli. Tsal and…

E. Hazeltine, D. Teague, and R. B. Ivry have presented data that have been interpreted as evidence against a central bottleneck. This article describes simulations of their Experiments 1 and 4 in the ACT-R cognitive architecture, which does possess a central bottleneck in production execution. The simulation model is capable of accounting for the…

Rayner and Slowiaczek have a different conception of the issues our experiments address than we do. These differences are discussed. Our main point, is that the extent to which the preview produces a benefit depends on the subject's expectations. (Author/RD)

McClelland and O'Regan's interpretation of data may not be appropriate. One could argue that subjects used different strategies in the expectation and no-expectation conditions. Second, an inappropriate baseline condition may have been used. Finally their results may not be generalizable to the use of parafoveal vision during reading. (Author/RD)