Verbal coding and the storage of form-position associations in visual–spatial short-term memory

Dent, Kevin; Smyth, Mary M.

doi:10.1016/j.actpsy.2005.03.004

Cited by 29 publications

(30 citation statements)

References 27 publications

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“…It is important to bear in mind that locating objects to their correct locations would be expected to be more difficult than remembering object identity or location alone (Postma and De Haan, 1996; Dent and Smyth, 2005). Therefore ceiling effects could theoretically lead to identification and localization performance being similar in patients and controls.…”

Section: Resultsmentioning

confidence: 99%

Binding deficits in memory following medial temporal lobe damage in patients with voltage-gated potassium channel complex antibody-associated limbic encephalitis

Pertzov

Miller

Gorgoraptis

et al. 2013

Brain

153

208

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Some prominent studies have claimed that the medial temporal lobe is not involved in retention of information over brief intervals of just a few seconds. However, in the last decade several investigations have reported that patients with medial temporal lobe damage exhibit an abnormally large number of errors when required to remember visual information over brief intervals. But the nature of the deficit and the type of error associated with medial temporal lobe lesions remains to be fully established. Voltage-gated potassium channel complex antibody-associated limbic encephalitis has recently been recognized as a form of treatable autoimmune encephalitis, frequently associated with imaging changes in the medial temporal lobe. Here, we tested a group of these patients using two newly developed visual short-term memory tasks with a sensitive, continuous measure of report. These tests enabled us to study the nature of reporting errors, rather than only their frequency. On both paradigms, voltage-gated potassium channel complex antibody patients exhibited larger errors specifically when several items had to be remembered, but not for a single item. Crucially, their errors were strongly associated with an increased tendency to report the property of the wrong item stored in memory, rather than simple degradation of memory precision. Thus, memory for isolated aspects of items was normal, but patients were impaired at binding together the different properties belonging to an item, e.g. spatial location and object identity, or colour and orientation. This occurred regardless of whether objects were shown simultaneously or sequentially. Binding errors support the view that the medial temporal lobe is involved in linking together different types of information, potentially represented in different parts of the brain, regardless of memory duration. Our novel behavioural measures also have the potential to assist in monitoring response to treatment in patients with memory disorders, such as those with voltage-gated potassium channel complex antibody limbic encephalitis.

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Section: Resultsmentioning

confidence: 99%

Binding deficits in memory following medial temporal lobe damage in patients with voltage-gated potassium channel complex antibody-associated limbic encephalitis

Pertzov

Miller

Gorgoraptis

et al. 2013

Brain

153

208

View full text Add to dashboard Cite

show abstract

“…A condition in which cues would have utility to structure an environmental task field in a fixed orientation could be when multiple target locations are presented and have to be held in memory. Clearly, the more target locations have to be held in memory, the greater the demands on working memory, as verified by studies in which having to remember more object locations results in poorer memory for location (Dent & Smyth, 2005). Holding multiple locations in memory might then induce the reliance on available cues in order to maintain memory for multiple targets and enhance memory performance.…”

Section: Implications For Other Spatial Tasksmentioning

confidence: 90%

External Cue Effects on Memory for Spatial Location within a Rotated Task Field

Fitting

Wedell

Allen

2008

Spatial Cognition & Computation

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“…We predicted better memory when memory load was low. This prediction follows from short-term studies in which having to remember more object locations results in poorer memory for location (Dent & Smyth, 2005). Additionally, it follows from the idea that holding multiple locations in memory could serve to interfere with memory for any given target and hence lead to poorer memory performance.…”

Section: Human Analog Of the Morris Water Mazementioning

confidence: 92%

Remembering Places in Space: A Human Analog Study of the Morris Water Maze

Fitting

Allen

Wedell

2007

Spatial Cognition v Reasoning, Action, Interaction

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Abstract. We conducted a human analog study of the Morris Water Maze, with individuals indicating a remembered location in a 3 m diameter arena over different intervals of time and with different memory loads. The primary focus of the study was to test a theory of how varying cue location and number of cues affects memory for spatial location. As expected, memory performance as measured by proximity to the actual location was negatively affected by increasing memory load and delay interval and decreasing number of cues. As memory performance decremented, bias effects increased and were in accordance with the cue-based memory model described by Fitting, Wedell and Allen (2005). Specifically, remembered locations were biased toward the nearest cue and error decreased with more cues. These results demonstrate that localization processes that apply to small two-dimensional task fields may generalize to a larger traversable task field.

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Verbal coding and the storage of form-position associations in visual–spatial short-term memory

Cited by 29 publications

References 27 publications

Binding deficits in memory following medial temporal lobe damage in patients with voltage-gated potassium channel complex antibody-associated limbic encephalitis

Binding deficits in memory following medial temporal lobe damage in patients with voltage-gated potassium channel complex antibody-associated limbic encephalitis

External Cue Effects on Memory for Spatial Location within a Rotated Task Field

Remembering Places in Space: A Human Analog Study of the Morris Water Maze

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