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Chris Welker

@chriswelker.bsky.social
485 followers 271 following 3 posts

Postdoc working with Adrienne Wood at UVA • PhD from Dartmouth with Thalia Wheatley • Interested in the dynamics of social interaction and connection

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Reposted by Chris Welker
Riccardo Fusaroli @fusaroli.eurosky.social · 10/09/2026
How does the architecture of a city shape the way we think, talk, and draw space? And how do spatial conventions travel across cultural generations? New paper in Open Mind, spearheaded by Z Alinam (w J Nölle, C Vesper, K Tylén & me): doi.org/10.1162/OPMI.a.380 🧵 1/
doi.org
When the City Speaks: How Urban Form Shapes the Cultural Transmission of Spatial Conceptualization
Abstract. How do urban environments shape the way people conceptualize and communicate space? Using a cultural transmission experiment in virtual reality, we asked participants to navigate one of two ...
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LT @lindseytepfer.bsky.social · 08/09/2026
We don’t just lock on to our first impression of someone and call it a day. Instead, we regularly revise our appraisals as we learn more about them. But *how* do our brains make this process possible? Check out this fresh pre-print to see how we went about answering this question!
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Brandon Woo @brandonwoo.bsky.social · 04/09/2026
New paper with Liz Spelke, @rebeccasaxe.bsky.social, and @ashleyjthomas.bsky.social! We find that when 4- to 6-month-old infants observe two individuals share saliva, they infer that those individuals have a close relationship. Free access link: authors.elsevier.com/a/1niQg_Oow0...
A conceptual schematic illustrating the logic of the studies. (A) Infants observe a central actor who shares saliva with one actor and does not share saliva with another actor. (B) From such observations, infants may infer and represent whether the actors are connected and how thick each connection is. (C) These representations support infants' expectations of who will respond to the central actor's distress.
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Steven Mesquiti @smesquiti.bsky.social · 14/08/2026
I've been thinking a lot about self-reference lately of how people use the word "I" and whether what that "I" actually means changes over the course of therapy as people improve. So, I'm excited to share a new preprint with @eriknook.bsky.social and team that explores this very idea Thread below 👇
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Psyche Loui @psycheloui.bsky.social · 27/03/2026
Why does live music hit different? Our new paper has a neural answer: EEG in a concert hall showed stronger brain-rhythm phase locking during live vs. recorded Bach violin — and that predicts higher pleasure & engagement. 1/2
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Elise Piazza @elisepiazza.bsky.social · 04/08/2026
New preprint alert: "Mapping the abstraction of song representations from perception to autobiographical memory", led by @rcassanocoleman.bsky.social, with @kellyjakubowski.bsky.social. osf.io/preprints/ps...
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Mark Thornton @markthornton.bsky.social · 03/08/2026
Very excited to share this preprint from me, @emmatempleton.bsky.social, @lindseytepfer.bsky.social & @thaliawheatley.bsky.social! "Friends and strangers engage in distinct regimes of body motion synchrony during conversation" osf.io/preprints/ps...
 Forms of body motion synchrony. A) Motion quantity synchrony – synchrony in the amount of motion (orange) people engage in over time. This form of synchrony is agnostic to the direction of this movement, may be positive or negative, occurs at varying time lags, and is not specific to matched body parts across members of the dyad. B) Pseudo-synchrony – motion quantity synchrony between people who are not actually interacting. That is, members of different conversations engaging in similar amounts of motion at similar points in the conversation relative to its initiation. And C) directional synchrony – people moving the same body parts in the same direction (or along the same axis in the opposite direction) at the same time (or at some specific time lag). Mechanisms of synchrony. A) Turn-taking, which causes increases in motion around the time of speaker role exchanges, as participants gesture to hand over or take over the floor. B) Conservation of motion in which one participant moves less when the other moves more, holding the total motion quantity relatively constant over time (note that the total amount of motion across the dyad is similar in the two panels, because one person reduces their motion to balance out the increase in the other’s motion). C) Entrainment, in which mutual following of the same conversational script leads to synchronized movement among people who are not directly interacting (i.e. pseudo-synchrony). Greeting gestures such as the handshakes depicted are one acute manifestation of this entrainment. D) Station-keeping, which maintains proxemic distance and eye level between members of the dyad. This mechanism accounts for directional synchrony, particularly between strangers who feel uncomfortable within each other’s personal space.Motion quantity synchrony among friends and strangers. A) Friends displayed significant positive synchrony in total motion quantity at short time lags (< 2.5 s) and B) this effect generalized across the majority of body part pairs (each line represents one pair). For example, one series of points might represent the synchrony between the amount of motion in one participant’s left hand and the other’s right foot. C) Strangers displayed significant positive synchrony in total motion quantity at short time lags (< 1 s) and significant negative total motion quantity synchrony at longer time lags (2.5 – 16.6 s). D) Again, this effect generalized to most body part pairs.Directional synchrony among friends and strangers. A) Among friends, we observed statistically significant directional synchrony in only two body parts (nose and eye) and only in the vertical axis. B) Among strangers, we observed statistically significant directional synchrony in a large number of body parts in the horizontal, vertical, and depth axes.
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Erik Brockbank @erikbrockbank.bsky.social · 16/07/2026
When you meet someone new, what kind of questions do you ask? It’s tempting to think that *really* getting to know people is just a matter of asking the right questions. Excited to share the next chapter in ongoing work on what makes a *deep question* with amazing collaborators...
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Cognition @cognitionjournal.bsky.social · 08/07/2026
How do people build new ideas from existing knowledge? By tracking Wikipedia searches, we found that novel ideas emerged when people balanced exploration with exploitation—alternating between distant topics and deep dives into related information.
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Buddhika Bellana @buddhikabellana.bsky.social · 03/07/2026
New work on agency and memory by @xianl-explorer.bsky.social, Janice Chen, myself and others! Using choose-your-own-adventures, we found that agency doesn’t always improve memory. Instead, agency personalized memory ❄️ ❄️ — even when people read the same text. www.nature.com/articles/s41...
A schematic image of all story paths in a choose-your-own-adventure story. Two paths are highlighted, diverging in the beginning my and end, but overlapping in the middle portion of the story.
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Tomer Ullman @tomerullman.bsky.social · 02/07/2026
Now out (for realz) in Cognition: "People Make Graded Judgments About The Inconceivable" (by Hu, Sosa, & me) Free preprint: www.tomerullman.org/papers/grade... Journal link: bit.ly/gradedInconCog @jennhu.bsky.social @cognitionjournal.bsky.social
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SINe Lab @sinelabdtu.bsky.social · 24/06/2026
Our new paper on heart rate synchrony in real-world settings is out in PNAS Nexus! Led by the amazing @hanluhe.bsky.social, see 👇 It came out yesterday, exactly 18 years since we conducted our first HR sync study between performers and spectators of a fire-walking ritual. @carlsbergfondet.dk
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Alicia Chen @aliciamchen.bsky.social · 16/06/2026
New paper with @rebeccasaxe.bsky.social "Expectations of reciprocal generosity are specific to equal relationships," in @openmindjournal.bsky.social. Thread below! Article: doi.org/10.1162/opmi... MIT News: news.mit.edu/2026/would-y...
news.mit.edu
Would you return a favor? Scientists say it depends on the relationship
People generally only engage in reciprocal generosity with others of equal or unknown status, MIT researchers experimentally demonstrated. During repeated interactions between people of different soci...
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Erica Busch @elbusch.bsky.social · 11/06/2026
Our new paper is out this week in Nature Neuroscience! www.nature.com/articles/s41... We built a BCI that works with the brain's natural geometry — and we found that people could learn to play a video game with their brains in <1 hr of training. This efficiency is groundbreaking & here's why:
nature.com
Human learning of noninvasive brain–computer interfaces via manifold geometry - Nature Neuroscience
Busch et al. use nonlinear neural manifolds to help humans gain rapid control over a noninvasive brain–computer interface, allowing them to learn how to play a video game with real-time fMRI neurofeed...
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tal boger @talboger.bsky.social · 26/05/2026
Complexity is ubiquitous in the world around us. But different stimuli are complex for different reasons. Does the mind nevertheless represent a ‘unified’ notion of complexity across domains? In @nathumbehav.nature.com, @chazfirestone.bsky.social & I show the answer is: yes! osf.io/preprints/ps...
Complex and simple stimuli across a variety of domains. Even though these stimuli are complex for different reasons, we suggest the mind unifies them by their complexity. https://osf.io/preprints/psyarxiv/p9xe3_v1
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Maya Rossignac-Milon @mrossignacmilon.bsky.social · 26/03/2026
New preprint! ✨ Do you and your partner have made-up words ("eggy" to mean awkward)? Do you and your bestie have an anecdote you love to tell together (that time one of you tripped over an acorn)? Do you and your closest colleague have a cherished ritual (weekly lunch at "the usual spot")? 🧵
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Hyowon (Hyo) Gweon @hyogweon.bsky.social · 20/03/2026
Out today in PNAS: Young children are surprised when a stranger has “insider knowledge” about them—and even make on-the-fly inferences about how that person could have learned it. So much fun working on this with Aaron Chuey and @julianje.bsky.social! www.pnas.org/doi/10.1073/pnas.2525150123
pnas.org
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
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Morten H. Christiansen @mh-christiansen.bsky.social · 18/03/2026
📣 New paper out in the Proceedings of the Royal Society B in which we investigated whether conversational alignment — the tendency to reuse each other's words, syntactic constructions, topics, sounds and gestures — can be used as a reliable individual trait. It cannot! 🧵 1/4 doi.org/10.1098/rspb...
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Erin Westgate @erinwestgate.bsky.social · 26/02/2026
How do we make new friends after moving? Primarily through work/classes or through friends of friends….and making friends via “friends of friends” predicts greater happiness, meaning, and psychological richness @chriswelker.bsky.social #SPSP2026
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Emma Templeton @emmatempleton.bsky.social · 13/02/2026
I will be hiring a full-time pre-doctoral Research Professional to work with me at Chicago Booth. Know someone interested in studying conversation and connection? Please help spread the word! More details, including application instructions, are here: www.chicagobooth.edu/-/media/facu...
chicagobooth.edu
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Mark Thornton @markthornton.bsky.social · 11/02/2026
New preprint from Lindsey Tepfer (@ltjaql.bsky.social) and me! We silenced portions of internal monologues in two films to manipulate participants' access to characters' thoughts. Using ISC and RSA, we found that this aligned later neural processing of the narrative & encoding of trait impressions.
Figure 1. Experimental stimuli and paradigm. 1A. Manipulation timeline. Each video features a total of 12 IM moments, half of which were silenced in version 1, and the other half silenced in version 2. This produces two versions of each video where only half of the IMs are audible to the participant. 1B. Voice removal. Background sounds were preserved in both versions, regardless of IM presence. 1C. fMRI paradigm. Participants were randomly assigned a version and watched both videos in a counter-balanced order. 1D. Afterwards, they made trait ratings on each video’s main character in random order before rating them on subsequent traits. Figure 2. Scanner and online participant trait rating results. A. Scanner participants arrive at similar conclusions about characters across versions by the end of each video. B. Trait ratings at the end of the videos are correlated between online and scanner participants. C. The IM manipulation had a significant effect on the trait ratings across the duration of the videos, such that different versions led to different trait impressions. D. Participants who saw different versions changed their ratings for both clip types but changed to a greater degree after seeing the IM segments relative to the NIM.  Figure 3. ISC results. Gaining access to the same mental state knowledge in earlier IM clips led to significantly (p < .05, corrected) more aligned neural activity in subsequent NIM clips across a wide swath of the temporal lobe, as well as the frontal pole and SPL. Figure 4. Representational similarity analysis results. 4A. RSA pipeline.  Clip-specific patterns of brain activity were correlated across movies within segment type (NIM or IM) to create a correlation distance matrix for each participant. Corresponding trait ratings were partitioned into components specific to each of the two versions of each film or shared across both versions. RDMs based on those traits were used to predict the neural RDMs. The resulting coefficients were sorted into matched (version), unmatched (version), and shared across version, and inference was performed via t-tests across participants. See methods section for further details of this analysis. 4B. Prior trait rating results. 1. While watching IM clips of the same version, the prior trait ratings predict activity in the bilateral A1, STS, STG, and right VLPFC. 2. Prior trait rating predicts activity in these regions again in the same-version NIM clips. 3. Across the two versions, while watching the NIM clips, the prior trait ratings predicted activity in the right occipitotemporal cortex. 4C. Trait updating results. 1. While watching NIM clips, the right STS & MTG predict version-matched trait updating. 2. In the unmatched NIM clips, STS & MTG again predict trait updating. 3. Across the two versions, the precuneus and LOC show pattern similarity for trait updating in participants.
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Elisa Baek @elisabaek.bsky.social · 03/07/2025
Excited to ✨share✨ that our paper on ✨sharing✨ is published! Across 3 studies that build on one another, we show that perceived alignment with one's peers increases the likelihood of information sharing. www.nature.com/articles/s41...
nature.com
Perceived community alignment increases information sharing - Nature Communications
Information sharing is a ubiquitous and consequential behavior. Here, the authors use neuroimaging and behavioral studies to show that people are driven to share information that they believe will be ...
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Abdo Elnakouri @abdoe.bsky.social · 16/01/2025
We are excited to announce this year's Shared Reality Virtual Conference happening Wednesday March 12 & Thursday March 13, 2025, between 9:50 AM - 1:10 PM ET! You can register below to receive the Zoom link! Submit a data blitz anytime until Feb 7. northwestern.az1.qualtrics.com/jfe/form/SV_...
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Andrew MacAskill @macaskillaf.bsky.social · 22/11/2024
Huge congrats to @karyna-mi.bsky.social for her paper published today in Science! She found that the hippocampus is really important for a key strategy we use to make decisions called hidden state inference! 🧪 🧠https://www.science.org/doi/10.1126/science.adq5874 1/7
science.org
Hidden state inference requires abstract contextual representations in the ventral hippocampus
The ability to use subjective, latent contextual representations to influence decision-making is crucial for everyday life. The hippocampus is hypothesized to bind together otherwise abstract combinat...
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Mark Thornton @markthornton.bsky.social · 14/11/2024
I've started working on a (very incomplete!) starter pack for social interaction researchers! If you're working in this space, please asked to be added (or suggest others)! Meant to be inclusive of many disciplines, methods, interaction types, and types of interacting agents: go.bsky.app/44VAEhU
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Mark Thornton @markthornton.bsky.social · 24/11/2023
Now in press at AESP, from @dianatamir.bsky.social & me: "Predicting other people shapes the social mind" doi.org/10.1016/bs.a...
Schematic illustration of the organization of social knowledge, featuring representational spaces for actions, mental states, personality traits, and situations, with predictive links within and between these layers of knowledge.Schematic illustration of how mental state dynamics could give rise to the representational geometry people apply to understand these states.
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