Marius 't Hart
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thartbm.bsky.social
Marius 't Hart
@thartbm.bsky.social
Movement [Learning | Perception]
Research Associate at York University, Toronto
For sure! We're developing a task where we can manipulate the environmental aspect much better. Will be a while, but it's coming.
November 11, 2025 at 12:17 AM
This data was recorded in 2022 or so... I finally got my act together to finish all the data analyses. But... data does not expire!

If you want to get your 2 cents in before we get reviews from the journal, now's your chance!
October 28, 2025 at 2:19 PM
We find that the influence of the frame extends somewhat in space, but not in time. Motion signals don't play much of a role; the frame effect is dominated by the perceived position of the frame. This tells us that our visual system localizes objects relative to their reference frame.
October 28, 2025 at 2:19 PM
Here we test what happens when there are offsets in space and time between the frame and probes. And technically also effects of two motion signals apart from those of the frame. Videos linked in the pdf!
October 28, 2025 at 2:19 PM
Agree with most stuff. Gaming the numbers is impossible if we don't rely on them anymore: reading > h-index, yes! But APCs are used by good journals to make science more open. Maybe Math is less open? Or preprints already make it open?
September 26, 2025 at 11:53 AM
This shows that dual adaptation experiments can be done in standard VR setups, opening new research questions to be tested in more immersive settings and with more freedom of movement.
September 13, 2025 at 2:26 PM
However, the incongruent movement group learned about as much as the single adaptation group. This reproduces effects of lead-in movements on dual adaptation, as found before.
September 13, 2025 at 2:26 PM
The congruent movement tools and color control groups only learned within each 8 trials, showing that color didn't work, as expected, but also that the tool identity was not sufficient for dual adaptation.
September 13, 2025 at 2:26 PM
In 4 groups, people switch between tools and rotations every 8 trials: 1) using two different colored paddles (color control), 2) using the paddle and curling rod (congruent movement), 3) the paddle and slingshot (incongruent movement) or 4) use one tool for a long time (single adaptation).
September 13, 2025 at 2:26 PM
People used one of 3 tools for this: an air-hockey paddle and a curling rod are moved forward, and either impact with the ball, or shove it for some time. There is also a slingshot that is pulled back and released to launch the ball.
September 13, 2025 at 2:26 PM
With @deniseyph.bsky.social and @jjodx.bsky.social as well as Gaurav Sharma and Mireille Broucke.
bsky.app
September 5, 2025 at 11:34 PM
Looking for a suitable journal now, feedback welcome in the meantime!
June 16, 2025 at 1:02 PM
6. The 38 older participants were not different from the others. Don't worry too much about getting older!
June 16, 2025 at 1:02 PM
5. Neither the speed nor the extent of learning could be predicted by any of our measures. Like some -but not all- previous findings, this argues against the eploration-exploitation hypothesis.
June 16, 2025 at 1:02 PM
4. Visually guided reaches and both measures of proprioception showed comparable levels of precision, with only no-cursor reaches showing increased noise. I.e. proprioception is not necessarily noisy.
June 16, 2025 at 1:02 PM
3. In contrast to our previous attempt to gauge the contribution of efferent-based signals in our measure of proprioception, we now find a small contribution. This still indicates that proprioception plays a large role in estimating the state of our limbs.
June 16, 2025 at 1:02 PM
2. There are the expected relationships between precision in the directions of reaches with and without visual feedback and also between our two measures of proprioception: active and passive hand localization.
June 16, 2025 at 1:02 PM
1. The main finding is that implicit reach aftereffects are best predicted by a combination of aligned proprioceptive precision and the amount of proprioceptive recalibration.
June 16, 2025 at 1:02 PM