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[Xmca-l] Re: imagination and controlling the perception of visual illusions.



In the London tube (underground) trains _can_ come from the right with
respect to the platform -- at least, I do have memories of them doing so
for _certain_ platforms.  But on the whole I think they usually come from
the left.

With respect to the construction of this particular illusion, I think that
the speed of the train is a function of the step in the image sequence,
which is a function of a necessarily disparate gap between frames so that
there is no obvious continuity of the people/distinct objects within the
train.  So I suspect the impression of the train speed is coincidental and
not related to real speeds (other than not being too obviously fast).

I haven't looked at it for long, but what I've found is that the train (for
me) first goes away from the platform, it takes me a short while to bring
it back the other way (maybe 5 seconds), then after a few seconds to switch
to outbound again, and thereafter I'm able to switch it back and forth with
relative immediacy aided with a bit of imagination.

Best,
Huw

On 1 October 2015 at 18:48, Martin John Packer <mpacker@uniandes.edu.co>
wrote:

> Because in England we drive on the other side of the street!  I've never
> thought about it before, but my memory of Tube trains is that they come
> from the right.
>
> Martin
>
> On Oct 1, 2015, at 11:18 AM, mike cole <mcole@ucsd.edu> wrote:
>
> >> You say that the speed of the train suggests that it is going away. But
> why
> >> would you assume that a train would be coming into a platform from the
> >> right? (my experience with most CTA platforms in Chicago is that, from
> the
> >> perspective of a person standing on the platform, they enter from the
> >> left).
>
>
>