We consider a relativistically moving blob consisting of an isotropic electron distribution that Compton-scatters photons from an external isotropic radiation field.
Static stimuli were also produced, representing the trace of the moving blob during its motion path.
We next measured performance for discriminating path deviation for a moving blob as shown in Movie S1.
JA 5.29pm: This is very cool - re-live today's game (and every game as the tournament progresses) through the medium of moving blobs with our Twitter replay.
However, Experiment 2 tells us that stimulus blur is not the limiting factor to performance for discriminating deviation of these moving blobs.
It was a soundscape of looming cataclysm, and it paced Lillevan's video projections (from his laptop) of rippling clouds and water, strobing vertical streaks, moving blobs like animated Rorschach blots and twinkling, pelting rain.
In summary, path deviation discrimination for static lines and moving blobs involves completely different mechanisms.
Path deviation for moving blobs involves a global mechanism that recruits local motion detectors sharing common directional selectivity, whose activity defines the pre- and post-deviation path, and hence the direction of deviation.
For the indirect approach, recent methods have proposed, among the others, the use of measurements such as the amount of moving pixels [4], blob size [5], fractal dimension [6], or other texture features [7].
Six months of observations indicated that the blobs were moving at 92% of the speed of light.
