Marius 't Hart

@thartbm.bsky.social

1159 Followers 526 Following

Movement [Learning | Perception] Research Associate at York University, Toronto

GPT 5.4 nano is asked: "how many a's are in assassination?" and it responds: "there are 5 "a"s in "assassination".
This graph shows 4 scatter plots. At the top it shows how well active as well as passive localization can predict implicit reach aftereffects, and at the bottom it shows how well a combination of variance and shift of localization can predict reach aftereffects for both active and passive reach aftereffects. The R^2 for using localization shift are 0.24 and 0.20, and when adding the standard deviation of baseline localization this increases to 0.28 and 0.29 for active and passive localization respectively.
This graph show the standard deviations of individual participants in both our younger and older participants on training reach direction, no-cursor reach directions and active as well as passive localization, with a mean and 95% CI as well as a distribution. The distributions for the two age groups look very similar.
Scatter plot showing SD of passive (proprioception only) over active localization (proprioception + prediction) of 270 participants, with an orthogonal distance regression (slope = 1.09; R^2 = 0.67). There are slightly fewer dots above the unity line than below.
tomatoes, onions and garlic roasting on a baking sheet on a BBQ
Decay of aftereffects in 4 groups, both data, and exponential decay fits. Aftereffects in accelerated conditions decay much faster than in rotated conditions, independent of the cue.
Illustration of accelerated ball trajectories and rotated ball trajectories, as well as of the visual cue of the slanted surface. Each perturbation was combined with either a slanted surface (cued) or a flat surface (uncued) so that we have 4 conditions: 1) uncued accelerated, 2) cued accelerated, 3) uncued rotated and 4) cued rotated.
An almost straight ball trajectory on a level surface with a target, and a curved ball trajectory on a slanted surface. Participants get to see the ball trajectory and the points they scored at the end of each trial.