When distractors and to-be-remembered items compete for the control of action: A new perspective on serial memory for spatial information.

2011 ◽  
Vol 37 (3) ◽  
pp. 834-843 ◽  
Author(s):  
Katherine Guérard ◽  
Sébastien Tremblay
Author(s):  
Katherine Guérard ◽  
Sébastien Tremblay

In serial memory for spatial information, some studies showed that recall performance suffers when the distance between successive locations increases relatively to the size of the display in which they are presented (the path length effect; e.g., Parmentier et al., 2005) but not when distance is increased by enlarging the size of the display (e.g., Smyth & Scholey, 1994). In the present study, we examined the effect of varying the absolute and relative distance between to-be-remembered items on memory for spatial information. We manipulated path length using small (15″) and large (64″) screens within the same design. In two experiments, we showed that distance was disruptive mainly when it is varied relatively to a fixed reference frame, though increasing the size of the display also had a small deleterious effect on recall. The insertion of a retention interval did not influence these effects, suggesting that rehearsal plays a minor role in mediating the effects of distance on serial spatial memory. We discuss the potential role of perceptual organization in light of the pattern of results.


2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
D. Menniti ◽  
S. A. Pullano ◽  
M. G. Bianco ◽  
R. Citraro ◽  
E. Russo ◽  
...  

Relying on the mechanism of bat’s echolocation system, a bioinspired electronic device has been developed to investigate the cortical activity of mammals in response to auditory sensorial stimuli. By means of implanted electrodes, acoustical information about the external environment generated by a biomimetic system and converted in electrical signals was delivered to anatomically selected structures of the auditory pathway. Electrocorticographic recordings showed that cerebral activity response is highly dependent on the information carried out by ultrasounds and is frequency-locked with the signal repetition rate. Frequency analysis reveals that delta and beta rhythm content increases, suggesting that sensorial information is successfully transferred and integrated. In addition, principal component analysis highlights how all the stimuli generate patterns of neural activity which can be clearly classified. The results show that brain response is modulated by echo signal features suggesting that spatial information sent by biomimetic sonar is efficiently interpreted and encoded by the auditory system. Consequently, these results give new perspective in artificial environmental perception, which could be used for developing new techniques useful in treating pathological conditions or influencing our perception of the surroundings.


2019 ◽  
Vol 1 ◽  
pp. 1-2
Author(s):  
Zdeněk Stachoň ◽  
Petr Kubíček ◽  
Hana Švedová ◽  
Jie Shen ◽  
Xinqian Wu ◽  
...  

<p><strong>Abstract.</strong> An increasing number of population brings increasing vulnerability of the society to different disasters and emergencies. The maps provide spatial information, which is useful on different levels of decision making during emergencies from strategic planning to single person decision making. To fit the user needs maps can be optimized for a particular user, user group, available technology or external conditions.</p><p>Evacuation is a crucial part of the process dealing with most of the emergencies. In case of building the standard ISO 23601:2009, Safety identification &amp;ndash; Escape and evacuation plan signs was developed to provide the guidelines for the design, materials, installation and other attributes of the evacuation plans. It is mostly based on the ISO 7010:2003, Graphical symbols &amp;ndash; Safety colours and safety signs &amp;ndash; Safety signs that are widely used in the buildings all around the world. The symbols were designed with the purpose to attract user attention under any circumstances and across the different cultural background. It can be a disadvantage in case of cartographic visualization, while the symbols on the map are not easy to identify the anchor point, increase the graphics clutter of the map (see figure 1).</p><p>In our research, we have decided to focus on the evaluation of user’s abilities to use and understand of designed evacuation signs and plans. As the standard is intended to be used worldwide, we have designed study focused on the comparison of the understanding to the meaning of evacuation symbols in general and also in the form of cartographic visualization. We have designed the user study performed in the first step in Nanjing (China) and in Brno (Czech Republic) in order to verify the cross-cultural universality of evacuation symbols. There were about seventy participants in China and seventy participants in the Czech Republic, who performed similar tasks. The tasks consist of separate symbol meaning selection, a separate symbol meaning estimation, identification of a particular symbol on the map and basic interpretation of the map content. The original and modified map signs were used as stimuli in case of cartographic visualization. Results were statistically processed and discussed. The results bring a new perspective on the standardized cartographic visualization for purposes of building evacuation.</p>


2008 ◽  
Vol 61 (5) ◽  
pp. 752-762 ◽  
Author(s):  
Katherine Guérard ◽  
Robert W. Hughes ◽  
Sébastien Tremblay

1993 ◽  
Vol 4 (3) ◽  
pp. 162-169 ◽  
Author(s):  
H. S. Terrace

The study of cognitive processes in animals provides a unique opportunity to investigate the phytogeny and ontogeny of cognition. Much of our understanding of human cognition derives from the intensive study of adult human subjects. Serial learning provides an instructive example. Since Ebbinghaus, experiments on serial learning have been performed almost exclusively on subjects who have had much experience learning lists by virtue of their formal and informal education. Recent research on serial learning in pigeons and monkeys provides a new perspective on this fundamental skill, which does not require language and which appears to he phylogeneticalty quite old. This research has also revealed qualitative differences in how pigeons and monkeys represent lists they learn to produce and provided opportunities to observe the development of list-learning strategies starting with a subject's first list.


2012 ◽  
Vol 41 (3) ◽  
pp. 378-391 ◽  
Author(s):  
Katherine Guérard ◽  
Candice C. Morey ◽  
Sébastien Lagacé ◽  
Sébastien Tremblay

2009 ◽  
Vol 38 (1) ◽  
pp. 83-91 ◽  
Author(s):  
K. Guerard ◽  
I. Neath ◽  
A. M. Surprenant ◽  
S. Tremblay

2006 ◽  
Vol 13 (3) ◽  
pp. 452-457 ◽  
Author(s):  
Sébastien Tremblay ◽  
Jean Saint-Aubin ◽  
Annie Jalbert

Author(s):  
T. A. Welton

Various authors have emphasized the spatial information resident in an electron micrograph taken with adequately coherent radiation. In view of the completion of at least one such instrument, this opportunity is taken to summarize the state of the art of processing such micrographs. We use the usual symbols for the aberration coefficients, and supplement these with £ and 6 for the transverse coherence length and the fractional energy spread respectively. He also assume a weak, biologically interesting sample, with principal interest lying in the molecular skeleton remaining after obvious hydrogen loss and other radiation damage has occurred.


Author(s):  
H.-J. Ou

The understanding of the interactions between the small metallic particles and ceramic surfaces has been studied by many catalyst scientists. We had developed Scanning Reflection Electron Microscopy technique to study surface structure of MgO hulk cleaved surface and the interaction with the small particle of metals. Resolutions of 10Å has shown the periodic array of surface atomic steps on MgO. The SREM observation of the interaction between the metallic particles and the surface may provide a new perspective on such processes.


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