Visuospatial attention: Beyond a spotlight model

Cave, Kyle R.; Bichot, Narcisse P. · 1999 · OpenAlex-citations

DOI: 10.3758/bf03212327

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Summary

This review paper by Cave and Bichot (1999) critically examines the prevailing "spotlight metaphor" of visuospatial attention, which posits that attention selects information from a specific region of the visual field akin to a beam of light. The authors argue that while this metaphor has historically guided experimental design, contemporary theories have become too complex for such a simple analogy. Consequently, the paper deconstructs the general question of whether attention is like a spotlight into seven specific inquiries regarding the nature of visual selection, including whether selection is location-based or object-based, the spatial extent of attention, and the mechanisms of facilitation versus inhibition. The authors synthesize evidence from a wide array of experimental techniques, including spatial cuing, visual search, distractor interference tasks, rapid serial visual presentation, and neurophysiological measures such as event-related potentials (ERPs) and single-cell recordings in macaque monkeys. A central focus is the debate between location-based selection and object-based selection. The review highlights that while early cuing experiments demonstrated that response times improve when stimuli appear at cued locations, the nature of this selection is nuanced. For instance, distance effects in cuing tasks often depend on the presence of landmarks or distractors, suggesting that attention may be allocated to objects rather than empty space. Key findings indicate that visual selection is not exclusively location-based nor exclusively object-based, but rather involves an interaction between the two. Evidence from Duncan’s (1984) paradigm, where subjects struggled to report features of two superimposed objects, initially suggested object-based selection. However, subsequent studies by Vecera and Farah (1994) and Kramer et al. (1997) demonstrated that these effects could be explained by attention selecting the spatial locations occupied by the object’s contours. Neurophysiological data further support this view; ERP studies show that attentional modulation (e.g., N1 and P1 components) occurs at the spatial location of targets, even during feature searches. Similarly, single-cell recordings in area V4 reveal that attending to an object enhances neural responses to stimuli within the receptive field near that object, regardless of whether the stimulus is task-relevant. The significance of this review lies in its conclusion that visual selection ultimately operates within a spatial medium, even when driven by object-based factors. The authors propose that while high-level conceptual representations may determine *what* to select, the mechanism of selection itself likely functions by facilitating or inhibiting specific spatial locations. This integration of behavioral and neural data suggests that the spotlight metaphor, while imperfect, retains validity if understood as a mechanism that can be shaped by object boundaries and perceptual grouping. The paper underscores the necessity of considering multiple experimental paradigms to fully understand the complex interplay between spatial and object-based attention.

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Topics

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• attention selective divided
• useful field of view
• attention allocation
• visual search
• inattentional change blindness
• peripheral attention
• multisensory crossmodal