Spatial Working Memory Lehnert & Zimmer 2006

Apr 30, 2011 11:51 PM

Auditory and visual spatial working memory  Lehnert and Zimmer  2006

Saarland Univ  Germany

TRIPARTITE WORKIGN MEMORY MODEL  (Baddely and Hitch 74 and

Baddely and Lgie 1999):  two mechs for tempr storage and maint of ifnormation:

the PL = phonological loop and the

VSSP  Visual Spatial Sketchpad   (further divided into the VISUAL CACHE and the INNER SCRIBE);

inner scribe  is an active rehearsal process that refreshes info held in the cache.

VISUAL CACHE  stores not only visual but static spatial info  (eg the spatial layout of objects)

INNER SCRIBE is involved in the maintenance of DYNAMIC SPATIAL INFO.

However,  the source of a heard sound can usu be located easily.

So,   their experiment...  how are spatial locations of sounds temporarily remembered.

results support the notion that at some level,  auditory and visual inputs share a component relevant

for the maintenance of spatial info in working memory.

suggestion is that this is  SPATIAL ATTENTION

RESUTS section..

We therefore believe that OBJECT FILES represent location info by referring to a common

repres of the egocentric environmental space shared by all modalities.

used. Rather, we think object files represent location in-formation by referring to a common representation of the egocentric environmental space shared by all modali-ties. For each attended item perceived in any modality,an object file exists that can be considered to represent episodic working memory. The object files are transient units consisting of active entries in domain-specific long-term memory structures, plus an additional componentthat temporarily binds these structures as long as the ob- ject file is active. This additional component might be at-tention (Treisman, 2006). Each file binds a multitude of heterogeneous information, only part of which is provided  by modality-specific structures. When memorizing an au-ditory item location, for instance, the bound memory con-tent would consist of sound information, location informa-tion, and some conceptual information (to the extent that

Spatial Working Memory Lehnert & Zimmer 2006

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