The Experts below are selected from a list of 20592 Experts worldwide ranked by ideXlab platform
Murray T Maybery - One of the best experts on this subject based on the ideXlab platform.
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transitional information in spatial Serial Memory path characteristics affect recall performance
Journal of Experimental Psychology: Learning Memory and Cognition, 2005Co-Authors: Fabrice B R Parmentier, Greg Elford, Murray T MayberyAbstract:This study examined the role of stimulus characteristics in a visuospatial order reconstruction task in which participants were required to recall the order of sequences of spatial locations. The complexity of the to-be-remembered sequences, as measured by path crossing, path length, and angles, was found to affect Serial Memory, in terms of both recall accuracy and response times. The results demonstrate that not all sequences are remembered equally and that spatial characteristics of the sequences constitute an important variable in the understanding of visuospatial Serial Memory. More important, the data suggest that spatial path represents transitional information and that, as is the case in verbal Serial Memory, transitional information is of critical importance in Serial Memory.
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grouping of list items reflected in the timing of recall implications for models of Serial verbal Memory
Journal of Memory and Language, 2002Co-Authors: Murray T Maybery, Fabrice B R Parmentier, Dylan Marc JonesAbstract:Three experiments examined the effect of temporal grouping on the timing of recall in verbal Serial Memory. Compared to an ungrouped condition, recall in a grouped condition produced a peak in latency between the groups (Experiment 1). However, the ratio of within- to between-group intervals at presentation was not reflected in recall (Experiment 2), contrary to the predictions of some oscillator models (Brown, Preece, & Hulme, 2000; Burgess & Hitch, 1999). In Experiment 3, grouped and ungrouped lists of different lengths were compared to assess a recent version of the ACT-R model applied to Serial recall (Anderson, Bothell, Lebiere, & Matessa, 1998). Recall latencies showed a cost at group onset related to group size and a cost for all items of the first group associated with carriage of a second group. Results are discussed with reference to oscillator models, the ACT-R model, and augmented versions of it.
Sebastien Tremblay - One of the best experts on this subject based on the ideXlab platform.
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asymmetric binding in Serial Memory for verbal and spatial information
Memory & Cognition, 2013Co-Authors: Katherine Guerard, Candice C Morey, Sebastien Lagace, Sebastien TremblayAbstract:As the number of studies showing that items can be retained as bound representations in Memory increases, researchers are beginning to investigate how the different features are bound together. In the present study, we examined the relative importances of the verbal and spatial features in Serial Memory for visual stimuli. Participants were asked to memorize the order of series of letters presented visually in different locations on the computer screen. The results showed that manipulating the phonological similarity of the letters affected recall of their spatial locations, but that increasing the complexity of the spatial pattern had no effect on recall of the letters. This finding was observed in both order reconstruction (Exps. 1 and 2) and probe Serial recall (Exps. 3 and 4), suggesting that verbal–spatial binding in Serial Memory for visual information is asymmetric.
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eye movements and Serial Memory for visual spatial information does time spent fixating contribute to recall
Experimental Psychology, 2007Co-Authors: Jean Saintaubin, Sebastien Tremblay, Annie JalbertAbstract:Abstract. This research investigated the nature of encoding and its contribution to Serial recall for visual-spatial information. In order to do so, we examined the relationship between fixation duration and recall performance. Using the dot task - a series of seven dots spatially distributed on a monitor screen is presented sequentially for immediate recall - performance and eye-tracking data were recorded during the presentation of the to-be-remembered items. When participants were free to move their eyes at their will, both fixation durations and probability of correct recall decreased as a function of Serial position. Furthermore, imposing constant durations of fixation across all Serial positions had a beneficial impact (though relatively small) on item but not order recall. Great care was taken to isolate the effect of fixation duration from that of presentation duration. Although eye movement at encoding contributes to immediate Memory, it is not decisive in shaping Serial recall performance. Our r...
Fabrice B R Parmentier - One of the best experts on this subject based on the ideXlab platform.
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transitional information in spatial Serial Memory path characteristics affect recall performance
Journal of Experimental Psychology: Learning Memory and Cognition, 2005Co-Authors: Fabrice B R Parmentier, Greg Elford, Murray T MayberyAbstract:This study examined the role of stimulus characteristics in a visuospatial order reconstruction task in which participants were required to recall the order of sequences of spatial locations. The complexity of the to-be-remembered sequences, as measured by path crossing, path length, and angles, was found to affect Serial Memory, in terms of both recall accuracy and response times. The results demonstrate that not all sequences are remembered equally and that spatial characteristics of the sequences constitute an important variable in the understanding of visuospatial Serial Memory. More important, the data suggest that spatial path represents transitional information and that, as is the case in verbal Serial Memory, transitional information is of critical importance in Serial Memory.
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grouping of list items reflected in the timing of recall implications for models of Serial verbal Memory
Journal of Memory and Language, 2002Co-Authors: Murray T Maybery, Fabrice B R Parmentier, Dylan Marc JonesAbstract:Three experiments examined the effect of temporal grouping on the timing of recall in verbal Serial Memory. Compared to an ungrouped condition, recall in a grouped condition produced a peak in latency between the groups (Experiment 1). However, the ratio of within- to between-group intervals at presentation was not reflected in recall (Experiment 2), contrary to the predictions of some oscillator models (Brown, Preece, & Hulme, 2000; Burgess & Hitch, 1999). In Experiment 3, grouped and ungrouped lists of different lengths were compared to assess a recent version of the ACT-R model applied to Serial recall (Anderson, Bothell, Lebiere, & Matessa, 1998). Recall latencies showed a cost at group onset related to group size and a cost for all items of the first group associated with carriage of a second group. Results are discussed with reference to oscillator models, the ACT-R model, and augmented versions of it.
Vaibhawa Mishra - One of the best experts on this subject based on the ideXlab platform.
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Optically disaggregated data centers with minimal remote Memory latency: Technologies, architectures, and resource allocation [Invited]
IEEE OSA Journal of Optical Communications and Networking, 2018Co-Authors: Georgios Zervas, Qianqiao Chen, Arsalan Saljoghei, Hui Yuan, Vaibhawa MishraAbstract:Disaggregated rack-scale data centers have been proposed as the only promising avenue to break the barrier of the fixed CPU-to-Memory proportionality caused by main-tray direct-attached conventional/traditional server-centric systems. However, Memory disaggregation has stringent network requirements in terms of latency, energy efficiency, bandwidth, and bandwidth density. This paper identifies all the requirements and key performance indicators of a network to disaggregate IT resources while summarizing the progress and importance of optical interconnects. Crucially, it proposes a rack-and-cluster scale architecture, which supports the disaggregation of CPU, Memory, storage, and/or accelerator blocks. Optical circuit switching forms the core of this architecture, whereas the end-points (IT resources) are equipped with on-chip programmable hybrid electrical packet/circuit switches. This architecture offers dynamically reconfigurable physical topology to form virtual ones, each embedded with a set of functions. It analyzes the latency overhead of disaggregated DDR4 (parallel) and the proposed hybrid Memory cube (Serial) Memory elements on the conventional and the proposed architecture. A set of resource allocation algorithms are introduced to (1) optimally select disaggregated IT resources with the lowest possible latency, (2) pool them together by means of a virtual network interconnect, and (3) compose virtual disaggregated servers. Simulation findings show up to a 34% resource utilization increase over traditional data centers while highlighting the importance of the placement and locality among compute, Memory, and storage resources. In particular, the network-aware locality-based resource allocation algorithm achieves as low as 15 ns, 95 ns, and 315 ns Memory transaction round-trip latency on 63%, 22%, and 15% of the allocated virtual machines (VMs) accordingly while utilizing 100% of the CPU resources. Furthermore, a formulation to parameterize and evaluate the additional financial costs endured by disaggregation is reported. It is shown that the more diverse the VM requests are, the higher the net financial gain is. Finally, an experiment was carried out using silicon photonic midboard optics and an optical circuit switch, which demonstrates forward error correction free 10-12 bit error rate performance on up to five-tier scale-out networks.
Annie Jalbert - One of the best experts on this subject based on the ideXlab platform.
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eye movements and Serial Memory for visual spatial information does time spent fixating contribute to recall
Experimental Psychology, 2007Co-Authors: Jean Saintaubin, Sebastien Tremblay, Annie JalbertAbstract:Abstract. This research investigated the nature of encoding and its contribution to Serial recall for visual-spatial information. In order to do so, we examined the relationship between fixation duration and recall performance. Using the dot task - a series of seven dots spatially distributed on a monitor screen is presented sequentially for immediate recall - performance and eye-tracking data were recorded during the presentation of the to-be-remembered items. When participants were free to move their eyes at their will, both fixation durations and probability of correct recall decreased as a function of Serial position. Furthermore, imposing constant durations of fixation across all Serial positions had a beneficial impact (though relatively small) on item but not order recall. Great care was taken to isolate the effect of fixation duration from that of presentation duration. Although eye movement at encoding contributes to immediate Memory, it is not decisive in shaping Serial recall performance. Our r...
