scholarly journals The high fidelity of scene representation in visual long-term memory

2010 ◽  
Vol 9 (8) ◽  
pp. 586-586
Author(s):  
A. Oliva ◽  
T. Konkle ◽  
T. F. Brady ◽  
G. A. Alvarez
2019 ◽  
Author(s):  
Annalise Miner ◽  
Mark Schurgin ◽  
Timothy F. Brady

Long-term memory is often considered easily corruptible, imprecise and inaccurate, especially in comparison to working memory. However, most research used to support these findings relies on weak long-term memories: those where people have had only one brief exposure to an item. Here we investigated the fidelity of visual long-term memory in more naturalistic setting, with repeated exposures, and ask how it compares to visual working memory fidelity. Using psychophysical methods designed to precisely measure the fidelity of visual memory, we demonstrate that long-term memory for the color of frequently seen objects is as accurate as working memory for the color of a single item seen 1 second ago. In particular, we show that repetition greatly improves long-term memory, including the ability to discriminate an item from a very similar item ('fidelity'), in both a lab setting (Exps. 1-3) and a naturalistic setting (brand logos, Exp. 4). Overall our results demonstrate the impressive nature of visual long-term memory fidelity, which we find is even higher fidelity than previously indicated in situations involving repetitions. Furthermore, our results suggest that there is no distinction between the fidelity of visual working memory and visual long-term memory, but instead both memory systems are capable of storing similar incredibly high fidelity memories under the right circumstances. Our results also provide further evidence that there is no fundamental distinction between the ‘precision’ of memory and the ‘likelihood of retrieving a memory’, instead suggesting a single continuous measure of memory strength best accounts for working and long-term memory.


2017 ◽  
Vol 8 ◽  
Author(s):  
Christof Kuhbandner ◽  
Elizabeth A. Rosas-Corona ◽  
Philipp Spachtholz

1999 ◽  
Vol 6 (4) ◽  
pp. 381-388 ◽  
Author(s):  
Erik D. Roberson ◽  
J. David Sweatt

The greatest barrier to the long-term storage of information in a biological system is the inevitability of molecular turnover. In this review, we discuss the features required of any chemical mechanism capable of overcoming this obstacle, positing that a specific type of “mnemogenic”, or memory-forming, chemical reaction is the basis of the engram. We describe how molecules as diverse as protein kinases, prions, and transcription factors can participate in mnemogenic reactions, and outline a blueprint for memory that postulates mnemogenic reactions at the synapse and in the nucleus and considers the constraints imposed by requirements for high fidelity and the ability to forget. This sort of a priori analysis may facilitate directed experimental approaches to understanding the mechanisms of lifelong memory.


2003 ◽  
Vol 14 (1) ◽  
pp. 74-76 ◽  
Author(s):  
Svein Magnussen ◽  
Mark W. Greenlee ◽  
Per Matti Aslaksen ◽  
Ole Øystein Kildebo

Experiments on short-term perceptual memory for elemental visual attributes, such as contrast, motion, orientation, and spatial frequency, have relied on a delayed discrimination technique in which the subject compares two stimuli presented at different points in time and memory is indexed by discrimination thresholds measured for the different time intervals between reference and test. In a variant of this procedure, used in experiments on long-term memory, the presentation of a single reference is followed by a memory test that combines two-alternative forced-choice decisions with the method of constant stimuli. With this procedure, it is impossible to distinguish the effects of criterion-setting processes and memory on performance, but this confound can be eliminated by testing many subjects and having each subject make a single decision. The resulting “group thresholds” are stable across time intervals of 24 hr, confirming previous findings of high-fidelity storage in the long-term memory range.


2013 ◽  
Vol 24 (4) ◽  
pp. 403-411 ◽  
Author(s):  
Zhisen Jiang Urgolites ◽  
Justin N. Wood

1994 ◽  
Vol 5 (2) ◽  
pp. 99-102 ◽  
Author(s):  
Svem Magnussen ◽  
Stem Dyrnes

Visual long-term memory for spatial information was assessed by measuring discrimination thresholds for the spatial frequency of sinusoidal gratings in a delayed discrimination task, with various time intervals separating test and reference stimuli The results demonstrate perfect preservation of information across 1-s to 50-hr retention intervals in the sense that the spatial frequency discrimination thresholds remained at the level defined by the spatial resolution of the sensory analysis This high-fidelity spatial long-term memory may represent an elementary memory mechanism for precategoncal storage of visual features


2016 ◽  
Vol 39 ◽  
Author(s):  
Mary C. Potter

AbstractRapid serial visual presentation (RSVP) of words or pictured scenes provides evidence for a large-capacity conceptual short-term memory (CSTM) that momentarily provides rich associated material from long-term memory, permitting rapid chunking (Potter 1993; 2009; 2012). In perception of scenes as well as language comprehension, we make use of knowledge that briefly exceeds the supposed limits of working memory.


2020 ◽  
Vol 29 (4) ◽  
pp. 710-727
Author(s):  
Beula M. Magimairaj ◽  
Naveen K. Nagaraj ◽  
Alexander V. Sergeev ◽  
Natalie J. Benafield

Objectives School-age children with and without parent-reported listening difficulties (LiD) were compared on auditory processing, language, memory, and attention abilities. The objective was to extend what is known so far in the literature about children with LiD by using multiple measures and selective novel measures across the above areas. Design Twenty-six children who were reported by their parents as having LiD and 26 age-matched typically developing children completed clinical tests of auditory processing and multiple measures of language, attention, and memory. All children had normal-range pure-tone hearing thresholds bilaterally. Group differences were examined. Results In addition to significantly poorer speech-perception-in-noise scores, children with LiD had reduced speed and accuracy of word retrieval from long-term memory, poorer short-term memory, sentence recall, and inferencing ability. Statistically significant group differences were of moderate effect size; however, standard test scores of children with LiD were not clinically poor. No statistically significant group differences were observed in attention, working memory capacity, vocabulary, and nonverbal IQ. Conclusions Mild signal-to-noise ratio loss, as reflected by the group mean of children with LiD, supported the children's functional listening problems. In addition, children's relative weakness in select areas of language performance, short-term memory, and long-term memory lexical retrieval speed and accuracy added to previous research on evidence-based areas that need to be evaluated in children with LiD who almost always have heterogenous profiles. Importantly, the functional difficulties faced by children with LiD in relation to their test results indicated, to some extent, that commonly used assessments may not be adequately capturing the children's listening challenges. Supplemental Material https://doi.org/10.23641/asha.12808607


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