Object location memory: The interplay of multiple representations

Wang, Hongbin; Johnson, Todd R.; Sun, Yanlong; Zhang, Jiajie

doi:10.3758/bf03193219

Cited by 15 publications

(14 citation statements)

References 42 publications

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“…Finally, the interplay of allocentric and egocentric representations of space has been previously explored using the "Milner paradigm" (Milner, Johnsrude & Crane, 1997;Wang, Johnson, Sun & Zhang, 2005), which has been shown to limit the influence of other factors, such as screen-based representations and egocentric representations. It would therefore be interesting to explore the exclusivity hypothesis under such circumstances.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…A number of studies have investigated the interplay between allocentric and egocentric representations of space (e.g., Wang, Johnson, Sun and Zhang, 2005;Xiao, Mou & MaNamara, 2009;Mou, Liu & McNamara, 2009). Wang, Johnson, Sun and Zhang (2005) suggested that when there are multiple representations for a target's location (allocentric and egocentric); it is likely that these will interact to produce increased performance (an increase in the speed of retrieval). Other research has shown that participants favour allocentric frames of reference if the stimulus array is regular (where the target objects are arranged to form a logical grid) or egocentric frames of reference when the items comprising the array are displayed in an irregular fashion (Xiao, Mou & MaNamara, 2009;Mou, Liu & McNamara, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Testing the exclusivity effect in location memory

Clark

Dunn

Baguley

2013

Memory

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There is growing literature exploring the possibility of parallel retrieval of location memories, although this literature focuses primarily on the speed of retrieval with little attention to the accuracy of location memory recall. Baguley et al. (2006) found that when a person has two or more memories for an object's location, their recall accuracy suggests that only one representation can be retrieved at a time (exclusivity). This finding is counter-intuitive given evidence of non-exclusive recall in the wider memory literature.The current experiment explored the exclusivity effect further and aimed to promote an alternative outcome (i.e. independence or superadditivity) by encouraging the participants to combine multiple representations of space at encoding or retrieval. This was encouraged by using anchor (points of reference) labels that could be combined to form a single strongly associated combination. It was hypothesised that the ability to combine the anchor labels would allow the two representations to be retrieved concurrently, generating higher levels of recall accuracy. The results demonstrate further support for the exclusivity hypothesis, showing no significant improvement in recall accuracy when there are multiple representations of a target object's location as compared to a single representation.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Testing the exclusivity effect in location memory

Clark

Dunn

Baguley

2013

Memory

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“…The orienting network includes parts of the superior and inferior parietal lobe, frontal eye fields, the subcortical collicular pathway (the superior colliculus of the midbrain and the pulvinar), and reticular nucleus of the thalamus. A particular important structure in this network is the posterior parietal cortex, a part of the dorsal ''where'' pathway (Ungerleider & Mishkin, 1982), which is thought to host multiple supramodal spatial representations in egocentric frames and to guide movements ( Wang, Johnson, Sun, & Zhang, 2005;Colby & Goldberg, 1999;Egeth & Yantis, 1997). Finally, executive control refers to monitoring and resolving conflicts in planning, decision making, error detection, and overcoming habitual actions.…”

Section: Introductionmentioning

confidence: 99%

Human Attentional Networks: A Connectionist Model

Wang

Fan

2007

Journal of Cognitive Neuroscience

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Abstract& Recent evidence in cognitive neuroscience has suggested that attention is a complex organ system subserved by at least three attentional networks in the brain, for alerting, orienting, and executive control functions. However, how these different networks work together to give rise to the seemingly unitary mental faculty of attention remains unclear. We describe a connectionist model of human attentional networks to explore the possible interplays among the networks from a computational perspective. This model is developed in the framework of leabra (local, error-driven, and associative, biologically realistic algorithm) and simultaneously involves these attentional networks connected in a biologically inspired way. We evaluate the model by simulating the empirical data collected on normal human subjects using the Attentional Network Test (ANT). The simulation results fit the experimental data well. In addition, we show that the same model, with a single parameter change that affects executive control, is able to simulate the empirical data collected from patients with schizophrenia. This model represents a plausible connectionist explanation for the functional structure and interaction of human attentional networks. &

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“…First, it sometimes determines the relative weighting of the various information sources, with weightings affected by several factors, including the reliability of the source, how variably or inexactly it is coded, how perceptually salient it is, and how frequently it has been used in the past, e.g., H.B. Wang, Johnson, Sun & Zhang, 2005. Second, when two information sources lead to incompatible responses, learning may determine which of the sources will be preferentially relied on, i.e., shaping a hierarchy of responses to be tried sequentially rather than production of an integrated estimate.…”

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confidence: 99%