Abstract
asymmetric pattern of binding of features in working memory is a controversial topic in the literature. The binding of visual- spatial and verbal-spatial information was studied in a serial recognition task to address the contribution of spatial location, visual appearance, and verbal identity to binding in working memory. The participants (n = 32) made a recognition judgment of two sequences of four stimuli each based on a relevant dimension while ignoring changes in an irrelevant dimension. In the visual and verbal tasks, the location was irrelevant. In the spatial tasks, the visual or verbal dimension was irrelevant. Our data showed that the visual or verbal characteristics of the object were incidentally encoded with the spatial location, but the spatial location of the items was not codified together with either the verbal features or visual characteristics when a verbal strategy was limited by articulatory suppression. This asymmetry in binding memory when the participants had to retain one of the features that was presented suggests a functional interaction between specific components of modalities of information and a system that maintains the multimodal representation. Keywords: working memory, binding, visual-spatial, verbal-spatial.
Highlights
Visuospatial working memory is widely accepted to encompass two storage systems
We investigated these questions by studying the binding of visual-spatial and verbal-spatial information in a serial recognition task
The interaction showed that changing the irrelevant dimension increased performance in all of the memory tasks, with the exception of the verbal condition in which no improvement in accuracy was observed
Summary
Visuospatial working memory is widely accepted to encompass two storage systems. The visual store is responsible for storing and processing information related to shape, color, brightness, and static visual layout properties. The spatial system is related to storage locations and trajectories (Logie, 1995; Klauer & Zhao, 2004; Darling, Della Sala, & Logie, 2007). The functional dissociation between the visual and spatial storage systems presents a new problem. Visual and spatial information must be integrated so we can remember, for example, the location of an object, or if it was a green square or a red triangle. Experimental evidence shows that the ability to store integrated objects appears to require no more attention than the storage of its individual features alone, suggesting that the integration (i.e., binding) of color and shape occurs automatically (Allen, Baddeley, & Hitch, 2006; Allen, Hitch, & Baddeley, 2009; Karlsen, Allen, Baddeley, & Hitch, 2010). In addition to being automatic, on some occasions the conjunction
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