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Liu, Zejun; Wang, Yujuan; Guo, Chunyan – Learning & Memory, 2020
It is widely accepted that associative recognition can be supported by familiarity through integrating more than two stimuli into a unit, but there are still three unsolved questions: (1) how unitization affects recollection-based associative recognition; (2) whether it is necessary to match the level of unitization (LOU) between original and…
Descriptors: Associative Learning, Recognition (Psychology), Familiarity, Correlation
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Derouet, Joffrey; Droit-Volet, Sylvie; Doyère, Valérie – Learning & Memory, 2021
The present study evaluates the updating of long-term memory for duration. After learning a temporal discrimination associating one lever with a standard duration (4 sec) and another lever with both a shorter (1-sec) and a longer (16-sec) duration, rats underwent a single session for learning a new standard duration. The temporal generalization…
Descriptors: Memory, Cognitive Processes, Time Factors (Learning), Task Analysis
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Nelson, James Byron; Fabiano, Andrew M.; Lamoureux, Jeffrey A. – Learning & Memory, 2018
Two experiments assessed the effects of extinguishing a conditioned cue on subsequent context conditioning. Each experiment used a different video-game method where sensors predicted attacking spaceships and participants responded to the sensor in a way that prepared them for the upcoming attack. In Experiment 1 extinction of a cue which signaled…
Descriptors: Learning Processes, Arousal Patterns, Attention, Context Effect
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Yang, Jiongjiong; Zhan, Lexia; Wang, Yingying; Du, Xiaoya; Zhou, Wenxi; Ning, Xueling; Sun, Qing; Moscovitch, Morris – Learning & Memory, 2016
Are associative memories forgotten more quickly than item memories, and does the level of original learning differentially influence forgetting rates? In this study, we addressed these questions by having participants learn single words and word pairs once (Experiment 1), three times (Experiment 2), and six times (Experiment 3) in a massed…
Descriptors: Learning Experience, Memory, Associative Learning, Recognition (Psychology)
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Boisselier, Lise; Ferry, Barbara; Gervais, Rémi – Learning & Memory, 2017
The hippocampal formation has been extensively described as a key component for object recognition in conjunction with place and context. The present study aimed at describing neural mechanisms in the hippocampal formation that support olfactory-tactile (OT) object discrimination in a task where space and context were not taken into account. The…
Descriptors: Animals, Role, Brain Hemisphere Functions, Olfactory Perception
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Kleber, Jörg; Chen, Yi-Chun; Michels, Birgit; Saumweber, Timo; Schleyer, Michael; Kähne, Thilo; Buchner, Erich; Gerber, Bertram – Learning & Memory, 2016
Synapsin is an evolutionarily conserved presynaptic phosphoprotein. It is encoded by only one gene in the "Drosophila" genome and is expressed throughout the nervous system. It regulates the balance between reserve and releasable vesicles, is required to maintain transmission upon heavy demand, and is essential for proper memory function…
Descriptors: Associative Learning, Genetics, Scores, Short Term Memory
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Tong, Michelle T.; Kim, Tae-Young P.; Cleland, Thomas A. – Learning & Memory, 2018
Long-term fear memory formation in the hippocampus and neocortex depends upon brain-derived neurotrophic factor (BDNF) signaling after acquisition. Incremental, appetitive odor discrimination learning is thought to depend substantially on the differentiation of adult-born neurons within the olfactory bulb (OB)--a process that is closely associated…
Descriptors: Memory, Olfactory Perception, Role, Animals
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Eisenhardt, Dorothea – Learning & Memory, 2014
The honeybee ("Apis mellifera") has long served as an invertebrate model organism for reward learning and memory research. Its capacity for learning and memory formation is rooted in the ecological need to efficiently collect nectar and pollen during summer to ensure survival of the hive during winter. Foraging bees learn to associate a…
Descriptors: Entomology, Rewards, Memory, Learning Processes
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Marter, Kathrin; Grauel, M. Katharina; Lewa, Carmen; Morgenstern, Laura; Buckemüller, Christina; Heufelder, Karin; Ganz, Marion; Eisenhardt, Dorothea – Learning & Memory, 2014
This study examines the role of stimulus duration in learning and memory formation of honeybees ("Apis mellifera"). In classical appetitive conditioning honeybees learn the association between an initially neutral, conditioned stimulus (CS) and the occurrence of a meaningful stimulus, the unconditioned stimulus (US). Thereby the CS…
Descriptors: Learning Processes, Memory, Classical Conditioning, Associative Learning
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Jones, Carolyn E.; Ringuet, Stephanie; Monfils, Marie-H. – Learning & Memory, 2013
Pairing a previously neutral conditioned stimulus (CS; e.g., a tone) to an aversive unconditioned stimulus (US; e.g., a footshock) leads to associative learning such that the tone alone comes to elicit a conditioned response (e.g., freezing). We have previously shown that an extinction session that occurs within the reconsolidation window…
Descriptors: Fear, Conditioning, Stimuli, Associative Learning
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Oros, Nicolas; Chiba, Andrea A.; Nitz, Douglas A.; Krichmar, Jeffrey L. – Learning & Memory, 2014
Learning to ignore irrelevant stimuli is essential to achieving efficient and fluid attention, and serves as the complement to increasing attention to relevant stimuli. The different cholinergic (ACh) subsystems within the basal forebrain regulate attention in distinct but complementary ways. ACh projections from the substantia innominata/nucleus…
Descriptors: Stimuli, Cognitive Processes, Attention, Brain Hemisphere Functions
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Raccuglia, Davide; Mueller, Uli – Learning & Memory, 2013
Throughout the animal kingdom, the inhibitory neurotransmitter ?-aminobutyric acid (GABA) is a key modulator of physiological processes including learning. With respect to associative learning, the exact time in which GABA interferes with the molecular events of learning has not yet been clearly defined. To address this issue, we used two…
Descriptors: Learning Processes, Associative Learning, Olfactory Perception, Animals
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Diviney, Mairead; Fey, Dirk; Commins, Sean – Learning & Memory, 2013
Learning to navigate toward a goal is an essential skill. Place learning is thought to rely on the ability of animals to associate the location of a goal with surrounding environmental cues. Using the Morris water maze, a task popularly used to examine place learning, we demonstrate that distal cues provide animals with distance and directional…
Descriptors: Cues, Learning Processes, Task Analysis, Animals
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Tabone, Christopher J.; de Belle, J. Steven – Learning & Memory, 2011
Associative conditioning in "Drosophila melanogaster" has been well documented for several decades. However, most studies report only simple associations of conditioned stimuli (CS, e.g., odor) with unconditioned stimuli (US, e.g., electric shock) to measure learning or establish memory. Here we describe a straightforward second-order conditioning…
Descriptors: Stimuli, Conditioning, Associative Learning, Memory
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Baker, Kathryn D.; McNally, Gavan P.; Richardson, Rick – Learning & Memory, 2012
The NMDA receptor partial agonist d-cycloserine (DCS) enhances the extinction of learned fear in rats and exposure therapy in humans with anxiety disorders. Despite these benefits, little is known about the mechanisms by which DCS promotes the loss of fear. The present study examined whether DCS augments extinction retention (1) through reductions…
Descriptors: Anxiety Disorders, Context Effect, Anxiety, Fear
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