Jesse Rissman
@rissman.bsky.social
UCLA cognitive neuroscience professor
Explorer of memories old and new.
fMRI / tDCS / Virtual Reality / Behavior
rissmanlab.psych.ucla.edu
Explorer of memories old and new.
fMRI / tDCS / Virtual Reality / Behavior
rissmanlab.psych.ucla.edu
Our results suggest that face perception and memory might be less intertwined than we might think, with implications for prosopagnosia and memory related disorders.
Work led by the fantastic Jan Kadlec.
Work led by the fantastic Jan Kadlec.
February 27, 2025 at 7:19 PM
Our results suggest that face perception and memory might be less intertwined than we might think, with implications for prosopagnosia and memory related disorders.
Work led by the fantastic Jan Kadlec.
Work led by the fantastic Jan Kadlec.
We test this with an additional face inversion experiment. We find greater inversion effects for easier perceptual levels --> more holistic processing at easy levels --> more interaction at easy levels as a result of face-specific interference which disrupts holistic processing.
February 27, 2025 at 7:19 PM
We test this with an additional face inversion experiment. We find greater inversion effects for easier perceptual levels --> more holistic processing at easy levels --> more interaction at easy levels as a result of face-specific interference which disrupts holistic processing.
Instead, we hypothesize that the face-related distractor in the face-specific interference task disrupts holistic face processing, pushing participants to switch to a feature-based strategy instead.
February 27, 2025 at 7:19 PM
Instead, we hypothesize that the face-related distractor in the face-specific interference task disrupts holistic face processing, pushing participants to switch to a feature-based strategy instead.
This pattern of interaction does not fit with theories of increased cognitive load, or overlapping shared resources. Also, just increasing cognitive load through an orthogonal, non-face related interference condition (math), has negligible effect on performance on the face task.
February 27, 2025 at 7:19 PM
This pattern of interaction does not fit with theories of increased cognitive load, or overlapping shared resources. Also, just increasing cognitive load through an orthogonal, non-face related interference condition (math), has negligible effect on performance on the face task.
An equally robust finding though, is that under more complex conditions (when an emotional face interference task was inserted into the delay period), we do find interactions. Surprisingly, these go in an unexpected direction - more interaction for easy rather than hard perceptual conditions. Why?
February 27, 2025 at 7:19 PM
An equally robust finding though, is that under more complex conditions (when an emotional face interference task was inserted into the delay period), we do find interactions. Surprisingly, these go in an unexpected direction - more interaction for easy rather than hard perceptual conditions. Why?
Across four large, independent datasets, with over 800 participants in total, we find clear evidence that face perception and face working memory are fundamentally independent, at least when task demands are low.
February 27, 2025 at 7:19 PM
Across four large, independent datasets, with over 800 participants in total, we find clear evidence that face perception and face working memory are fundamentally independent, at least when task demands are low.
We parametrically modulate difficulty in each domain separately. Shared resources would imply interactions between perceptual and memory difficulty, with increasing interaction as difficulty increases. If they are independent however, we would expect difficulty to be additive.
February 27, 2025 at 7:19 PM
We parametrically modulate difficulty in each domain separately. Shared resources would imply interactions between perceptual and memory difficulty, with increasing interaction as difficulty increases. If they are independent however, we would expect difficulty to be additive.
We designed the Face Memory and Perception (FMP) task to systematically test whether perceptual and memory components of face processing rely on shared cognitive resources, or function independently.
February 27, 2025 at 7:19 PM
We designed the Face Memory and Perception (FMP) task to systematically test whether perceptual and memory components of face processing rely on shared cognitive resources, or function independently.
Would love to be added if I’m not already on there. Thanks!
November 17, 2024 at 8:34 PM
Would love to be added if I’m not already on there. Thanks!
Maybe this one:
Schleim, S. (2022). Why mental disorders are brain disorders. And why they are not: ADHD and the challenges of heterogeneity and reification. Frontiers in Psychiatry, 13, 943049.
www.frontiersin.org/journals/psy...
Schleim, S. (2022). Why mental disorders are brain disorders. And why they are not: ADHD and the challenges of heterogeneity and reification. Frontiers in Psychiatry, 13, 943049.
www.frontiersin.org/journals/psy...
Frontiers | Why mental disorders are brain disorders. And why they are not: ADHD and the challenges of heterogeneity and reification
<p>Scientific attempts to identify biomarkers to reliably diagnose mental disorders have thus far been unsuccessful. This has inspired the Research Domain Cr...
www.frontiersin.org
February 9, 2024 at 3:53 PM
Maybe this one:
Schleim, S. (2022). Why mental disorders are brain disorders. And why they are not: ADHD and the challenges of heterogeneity and reification. Frontiers in Psychiatry, 13, 943049.
www.frontiersin.org/journals/psy...
Schleim, S. (2022). Why mental disorders are brain disorders. And why they are not: ADHD and the challenges of heterogeneity and reification. Frontiers in Psychiatry, 13, 943049.
www.frontiersin.org/journals/psy...
In case you’re interested in trying out these methods, all of @crewalsh.bsky.social’s code is available at osf.io/5q6th/
November 27, 2023 at 10:12 PM
In case you’re interested in trying out these methods, all of @crewalsh.bsky.social’s code is available at osf.io/5q6th/
Future studies will be needed to better characterize whether these subtle learning-induced semantic distortions are short-lived or whether they can endure for weeks or months.
November 27, 2023 at 10:10 PM
Future studies will be needed to better characterize whether these subtle learning-induced semantic distortions are short-lived or whether they can endure for weeks or months.
Despite the general stability of semantic knowledge over the course of one’s lifetime, our results demonstrate that even a brief session of episodic learning can subtly yet systematically re-sculpt semantic space, and this representational change impacts subsequent recall.
November 27, 2023 at 10:10 PM
Despite the general stability of semantic knowledge over the course of one’s lifetime, our results demonstrate that even a brief session of episodic learning can subtly yet systematically re-sculpt semantic space, and this representational change impacts subsequent recall.
Testing, on the other hand, facilitates elaborative connections linking paired words – when these connections don’t already exist (like in semantically related pairs), new connections are created, which subtly change the representation content of both cue and target.
November 27, 2023 at 10:06 PM
Testing, on the other hand, facilitates elaborative connections linking paired words – when these connections don’t already exist (like in semantically related pairs), new connections are created, which subtly change the representation content of both cue and target.
Together, our results paint a picture where there are two (interacting) processes occurring during paired associate learning. Pre-existing semantic information enhances memory by reducing interference from potential lures and making cues more predictive of targets.
November 27, 2023 at 10:06 PM
Together, our results paint a picture where there are two (interacting) processes occurring during paired associate learning. Pre-existing semantic information enhances memory by reducing interference from potential lures and making cues more predictive of targets.
Change in the target, on the other hand, was only predictive of later recall in unrelated pairs that were tested – for those pairs, the more the target representation changed, the more likely the pair was to be recalled.
November 27, 2023 at 10:05 PM
Change in the target, on the other hand, was only predictive of later recall in unrelated pairs that were tested – for those pairs, the more the target representation changed, the more likely the pair was to be recalled.
Finally, we looked to see how all this representational change related to behavior. Regardless of how a pair was learned or the semantic relatedness of the pair, more representational change in the cue was associated with a higher probability of recall.
November 27, 2023 at 10:05 PM
Finally, we looked to see how all this representational change related to behavior. Regardless of how a pair was learned or the semantic relatedness of the pair, more representational change in the cue was associated with a higher probability of recall.
Then, we looked at how the representational structure of individual words changed across learning - we showed that semantically related cues were drawn asymmetrically towards their targets, while semantically unrelated cues and targets were drawn together symmetrically.
November 27, 2023 at 10:03 PM
Then, we looked at how the representational structure of individual words changed across learning - we showed that semantically related cues were drawn asymmetrically towards their targets, while semantically unrelated cues and targets were drawn together symmetrically.
Next, we showed that testing repelled words that were moderately related to the to-be-learned cues. Put another way, words that might have tripped up recall of our to-be-learned pairs were pushed further away in semantic space so they didn’t interfere with recall.
November 27, 2023 at 10:02 PM
Next, we showed that testing repelled words that were moderately related to the to-be-learned cues. Put another way, words that might have tripped up recall of our to-be-learned pairs were pushed further away in semantic space so they didn’t interfere with recall.
Using this measure, we first showed that words in semantically related pairs were drawn closer in representational space than those in semantically unrelated pairs.
November 27, 2023 at 10:01 PM
Using this measure, we first showed that words in semantically related pairs were drawn closer in representational space than those in semantically unrelated pairs.