Jaime Castrellon

@jjfcastrellon.bsky.social

Assistant Prof @UCLA | studying decision making & motivation | #LatinxInSTEM | #FirstGen | he/him https://www.psych.ucla.edu/faculty-page/jcastrellon/

I'll be recruiting PhD students (2027 entry) and a postdoc to join the lab at Berkeley. Interests: • continuous person perception in interactive contexts • impression management and its biases • social perception in digital spaces Get in touch if there's overlap. Very excited for this next chapter!

🚨NEW PREPRINT (w/ Fleming Peck & Hongjing Lu) "Spontaneous emergence of context-dependent statistical learning in humans and neural networks" We are constantly predicting what will happen next. Yet the same cue can lead to different predictions depending on context. How might this work...? 🧵1/8

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📢 Thrilled to share our paper is out now in @natcomms.nature.com Shared computations underlie how we acquire actions that are mutually beneficial, instrumentally harmful (benefits self at the expense of others), altruistic (benefit others at the expense of self), or mutually costly 🧵 rdcu.be/eL8mZ

Neurocomputational basis of learning when choices simultaneously affect both oneself and others

Nature Communications - When learning to make choices that simultaneously affect the self and others, asymmetric encoding of information guides future social behaviors across mutually beneficial,...

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I'm recruiting PhD students to join my new lab in Fall 2026! The Shared Minds Lab at @usc.edu will combine deep learning and ecological human neuroscience to better understand how we communicate our thoughts from one brain to another.

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I updated my NIH D-SPAN repo (github.com/wj-mitchell/...) to reflect the current state of the mechanism, which - like other diversity awards - is not good. It made my day the handful of times folks reached out to share how it helped. I'm leaving it otherwise unaltered in memoriam.

GitHub - wj-mitchell/DSPAN_Details: Information and Materials Related to My NIH DSPAN F99/K00 Award

Information and Materials Related to My NIH DSPAN F99/K00 Award - wj-mitchell/DSPAN_Details

github.com

This is a fucking shitty ass day but at some point STEM faculty have to recognize that what we are seeing happen with federal funding of biomedical research through the NIH and NSF is being used and manipulated to punish and defund higher education institutions.

Le Monde reporting that a French scientist traveling to Houston to attend a conference was denied entry to US after a search of his phone & computer revealed messages critical of Trump's science cuts, "which [says CPB] conveyed hatred of Trump & could be qualified as terrorism". Computer confiscated

Firings are happening right now at the National Science Foundation. Essential staff are being cut. This isn’t about the budget. If it was, they’d be going after the military (17%) or state appropriations (38%). NSF is 0.7% of the federal budget. All federal employees make up only 4% of the budget.

Thanks to all of the NIHers and their friends who reached out to me. I am still here (DM me or Signal jeremymberg.78) I still have a very incomplete picture but based on what I have been told, the damage to NIH and to many wonderful people who work(ed) there is/was impossible for me to imagine 1/n

The damage today (actually yesterday) to the intramural program appears to especially bad. It also appears (although I need more confirmation) that most or all of the tenure track investigators in their first 2 years in several, and perhaps all, institutes were terminated. 7/n

Just in case you thought that removing DEI criteria would mean that everyone is competing equally: NIH is removing grad students from underrepresented backgrounds from the applicant pool altogether. Their applications will not be considered. Other students, not from these backgrounds, will be.

Update: They were removed from our reviewer assignments completely. I'm so sorry to all those graduate students. 

Anonymous to protect the identity of the NIH employee I spoke to...I am on study section next month to discuss F awards. We were just instructed to put the F31-Diversity applications on the bottom of our priority list for review because there is a chance we may not be able to review them. My heart is breaking for the grad students and their mentors that put so much work into these just for them to be disqualified and thrown out.