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Memory retrieval is influenced by both prior and current experiences. The various factors (e.g., frequency, recency, or similarity) may interfere with retrieval due to prior experiences, while the context-dependent memory effect may enhance based on present experiences. Most memory research has been limited to controlled laboratory settings, but this study aims to examine memory retrieval in a more natural setting by using a GPS application (e.g., Traccar Client) to track participants’ daily GPS locations every 60 seconds for 5 weeks. Participants were then asked to recall their locations at a specific time, choosing from all locations visited in the previous 4 weeks. Results demonstrated the existence of context-dependent memory effect in real-world settings, with more frequent or recent visits leading to increased correct responses. This study is the first to use the current methodology to study the context-dependent memory effect and to measure an individual’s genuine memories in a more ecologically valid way.

CogSci 2023

Context Dependent Memory in the Wilds

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The 45th Annual Meeting of the Cognitive Science Society will take place in Sydney, Australia as a modified hybrid conference. Presentations from the main-session room will be live-streamed every day for all events. This will include all invited talks and award sessions. Recordings of all CogSci 2023 sessions will be made available for on-demand viewing after the conference.<br>
The in-person component will be held at the International Convention Centre Sydney at Darling Harbour. The Conference will take place Wednesday July 26th – Saturday July 29th, 2023 (Wednesday, July 26th is the Workshops Day).

Join us!

<br>[**The Program at a Glance can be found here**](https://cognitivesciencesociety.org/wp-content/uploads/2023/07/COgSci-PAAG-V2.pdf)
<br>[**The Detailed Program can be found here**](https://online.fliphtml5.com/ebtyf/mswz/)
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#### **CogSci 2023 Program Book**
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The 45th Annual Meeting of the Cognitive Science Society presents the latest research across cognitive science and highlights the theme of Cognition in Context.

Research has demonstrated an advantage for self-associated stimuli for a range of mental functions (Sui & Humphreys, 2017). However, relatively less is known about whether the prioritization also exists for internal representations (Yin et al., 2019). In the current study we first asked participants to associate social – labels (self, friend, stranger) with arbitrary geometrical shapes (triangle, quadrilateral, and pentagon) as in (Sui et al., 2012) and then tested them for the maintenance of one or more features (shape, location, or a combination) of the target stimuli during a delayed match – to – sample task. In line with our expectations, our participants indeed showed a distinct advantage for self- associated stimuli not only for the maintenance of single features (identity, location) but also for a combination (shape & location). Our findings are in line with the proposal that self-refence may aid in binding information in working memory (Sui & Humphreys, 2015).

I Remember Me the best, always? Evidence for Self-Prioritization in Working Memory Binding using a Visuo-Spatial Working Memory Task.

Episodic memory proves fragile and undergoes a protracted development, as it often requires a combination of multiple elements, during which interference occurs as different sets of learned information partially overlap. One way of preventing interference is a complex representation that links together multiple components of an experience (i.e., three-way binding between items and context). The present study aimed to examine the developmental trajectory of the ability to form complex memory structures. Twenty-two 5-year-olds and 26 adults participated in this study and performed a memory task that required binding two items to a context. The results showed that adults were able to form three-way binding; however, 5-year-olds exhibited difficulties in both three-way binding and binding between two items. Moreover, 5-year-olds did not benefit from extra learning opportunities, indicating that their difficulty in forming complex binding structures did not result from insufficient learning, but from a property of immature episodic memory.

Examination of Developmental Changes in Complexity of Memory Structures

Bilingualism is highly heterogeneous, in terms of language background, age of acquisition, and learning environment... Mapping these variations to brain structure is important to understand the relationship between language and brain. However, these differences in neuroanatomy are entangled with the variation from individual differences unrelated to bilingualism, for example, age and sex. Our goal is to disentangle bilingual-specific neuroanatomical variation from the common variation. First, we build a dataset including 12,000+ brain 3D images from bilinguals and monolinguals along with demographic and linguistic measures. Second, we train a contrastive neural network (Contrastive Variational Autoencoder, CVAE) on the dataset to learn the variations from bilingual-specific variations from variations shared with monolingual groups. We examine if the bilingual-specific neuroanatomical variations correlate with individual differences in linguistic measures through Representational Similarity Analysis. The initial results reveal that the common variation in brain structure shared by two groups can be identified by CVAE.

Contrastive neural network reveals the structure of neuroanatomical variation within bilingualism

The simple brain time theory of time perception states that the temporal properties of the neural processing of sensory features are isomorphic to the temporal properties represented in experience. If true, this theory provides a simple solution to the temporal binding problem. I argue that the theory cannot account for an adaptive trade-off between, the speed of perceptual availability and the accuracy of temporal integration. I hold, that a theory of time perception must get this trade-off right to account for temporal binding. This requires solving two timing problems: the problem of neural delay and the problem of desynchronization. The simple brain time theory is unable to give a unified solution to these problems. Either it fails to answer one of these problems, and veers too much on one side of the trade-off, or it violates its commitment to its central theses. I end by sketching a few possible solutions.

Neural Delay & Desynchronization problems for the Simple Brain Time Theory

Lighthouse beams are often perceived as bent rather than straight, and observers sometimes infer that a rotating lighthouse beam originates from a "phantom lighthouse" that lies in the opposite direction from the true source of the beam. We argue that both illusions arise as a result of Bayesian inference based on natural scene statistics and support our argument by implementing a formal computational model. In addition to capturing both illusions, our model makes the novel prediction that the phantom lighthouse illusion should only emerge at a critical point at which the observer is located around 75 metres in front of the true source of a rotating lighthouse beam. Our theory therefore motivates a future line of experimental work, and contributes to a broader body of research that explains perceptual phenomena (including visual illusions) in terms of Bayesian inference.

A Bayesian account of two visual illusions involving lighthouse beams

Approximate number perception is noisy, but it is unclear whether that noise reflects an error-prone attempt to report one's best guess of the value, or an inherently stochastic process such as sampling. Here we demonstrate that approximate number estimation should be thought of as a sampling procedure, as the average of two estimates of the same stimulus tends to outperform either estimate alone. Additionally, the average difference between the two estimates of a given number linearly increases as a function of number, consistent with Weber's law. Finally, we provide evidence that the classic psychophysical curves associated with number representation are represented within the mind after a single brief viewing of a stimulus, and not only useful for describing a summary of behavior over many trials.

Sampling in Approximate Number Perception

Increased left-handedness and atypical lateralization in individuals with neurodevelopmental and psychiatric disorders point to a deep yet unresolved connection between handedness, hemispheric asymmetry, and normal brain functioning. Most handedness-lateralization research has either excluded left-handers due to their higher variability or failed to control the degree of handedness. The discrete categorization based on arbitrary criteria or cut-off has made it challenging to address inter-individual variations in the lateralization of cognitive functions. In this study, capturing responses from across the handedness continuum in tasks of divided visual half-field paradigm, we explored the lateralization patterns in different stages of visual processing of spatial frequency, global-and-local, faces and words. We found that the degree of handedness significantly affects the lateralization in all tasks except in spatial frequency. Notably, even though the direction of hemispheric preference did reverse in left-handers for visuospatial attention like in global-local processing, the same was not the case for word and face processing. Our results substantially evidence handedness to differentially influence the lateralization of visual processes. The observed relationship between the dominant hand and global-local processing significantly points to the action-dependent modulation of visual attention. We conclude that the degree of left-handedness is potentially a critical factor in lateralization, and a continuum approach would be beneficial to control for the individual variations in laterality research

Handedness Modulates Spatial Attention – Insights From Individual Variations In Lateralization Of Cognitive Functions

Many models of intuitive physical reasoning posit some kind of mental simulation mechanism, yet everyday environments frequently contain far more objects than people could plausibly represent with their limited cognitive capacity. What determines which objects are actually included in our representations? We asked participants to predict how a ball will bounce through a complex field of obstacles, and probed working memory for objects in the scene that were more and less likely to be relevant to the ball’s trajectory. We evaluate different accounts of relevance and find that successful object memory is best predicted by how frequently a ball’s trajectory is expected to contact that object under a probabilistic simulation model. This suggests that people construct representations for
mental simulation efficiently and dynamically, on the fly, by adding objects “just in time”: only when they are expected to become relevant for the next stage of simulation.

"Just In Time" Representations for Mental Simulation in Intuitive Physics

Computational models of perceptual decision-making depend heavily on empirical goodness-of-fit measures for model selection. However, it is not possible to improve models' fit to data indefinitely, particularly when the data in question are variable across multiple elicitations. The completeness of a model or a theory assesses the extent to which it can predict observations in comparison with an ideal model. We measure the completeness of contemporary race models on a random dot motion discrimination task and show that the simple drift diffusion model is already close to complete in describing random dot motion discrimination data, with more complex models being in fact over-fit to datasets. We also estimate the retest reliability of the random dot motion discrimination task as part of the exercise of measuring completeness, and describe some implications of our estimates for trial-level neural models of this task.

Measuring the completeness of race models for perceptual decision-making

Humans are surrounded by various typefaces, and the preliminary corpus analysis suggests that typefaces commonly used in picture books differ from others, which implies that familiar typefaces differ between children and adults. Thus, this study investigated whether children can easily recognize fonts considered familiar to them. Japanese-speaking children (aged 7–8 years) performed a hiragana-character discrimination task, which includes different (e.g., あ–お) and same (e.g.,あ–あ) character–pair conditions. It involves various typefaces familiar to children (i.e., picture book typefaces) or adults; the study indexed discriminability using averaged reaction times to the character–pair conditions. Accuracy was sufficiently high for all typefaces (>90%), and no significant difference existed in response times between any typeface. The results suggested that children can stably discriminate characters regardless of whether or not a font is commonly used in picture books.

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I Remember Me the best, always? Evidence for Self-Prioritization in Working Memory Binding using a Visuo-Spatial Working Memory Task.

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Next from CogSci 2023

I Remember Me the best, always? Evidence for Self-Prioritization in Working Memory Binding using a Visuo-Spatial Working Memory Task.

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