7/ Big thanks to our supporting institutions:
@umontreal.ca, @cra-chusj.bsky.social, @mila-quebec.bsky.social, @braincanada.bsky.social, @simonsfoundation.org, @azrielifoundation.bsky.social, @ivado.bsky.social & @cifar.bsky.social 🙏

6/ Grateful to all participants and to the dedicated @ppsp-team.bsky.social.
Special thanks to @introspection.bsky.social for his guidance.
Proud to share first authorship with @quentinmoreau.bsky.social and collaborate with Lisane Moses and Gabriela Milanova.

5/ Results:
❌ No effect of rTPJ stimulation on motor coordination (Experiment 1 and 2).
✅ Repeated HD-tRNS sharpened detection of competitive intent and reduced humanness attribution during competitive interactions (Experiment 1 only).

4/ Two complementary experiments:
Exp1 (n=39): HD-tRNS⚡ or sham 🚫 randomized blocks
Exp2 (n=40): HD-tRNS⚡ and sham 🚫 randomized trials
During trials, participants synchronized finger movements with a covert virtual partner, then rated perceived cooperativeness & humanness.

3/ We applied high-definition transcranial random noise stimulation (HD-tRNS) over the right temporoparietal junction (rTPJ) of participants interacting with the virtual partner of the HDC, aiming to probe the rTPJ’s causal role in real-time social interaction.

2/ Our work directly builds on Dumas et al. (2020), who combined high-density EEG with the Human Dynamic Clamp (HDC) paradigm to reveal the rTPJ as a key cortical hub for integrating self–other representations.

1/ TL;DR:
High-definition transcranial random noise stimulation (⚡) over the right temporoparietal junction (🧠) sharpened detection of competitive intent during interaction with a covert virtual partner (🤖)—without affecting motor coordination.

Great thanks to coauthors and collaborators: Ishita Agarwal, Quentin Moreau (@quentinmoreau.bsky.social), Bassem Hiba, Sven Bestmann (@armlabucl.bsky.social), Gareth Barnes, and James Bonaiuto (@danclab.bsky.social). It was a huge amount of work and cluster time, but it’s out now!

Amazing work, @felixbigand.bsky.social ! And thanks to all our lab collaborators: Sara Abalde, @robertabianco.bsky.social and @trinhnguyen.bsky.social !