Our focus is jumping all the time. The feedback of the movement of
the eyes has to be encoded for error correction of the visual signal
for stability to occur. We have not learned the feedback signals
from electric toothbrushes. We should observe habituation to the
jiggle.
Ron Blue
----- Original Message -----
From: Faith L Florer <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, November 04, 1999 3:45 PM
Subject: Perception Question, Part 2
>
> The explanation on the page listed by Chuck Huffman seems best to
me.
> Would it be correct in supposing, then, that the phenomenon
basically is a
> sort of apparent motion percept? If so, is the lack of reafferent
feedback
> part of the explanation even necessary?
>
> My students will be very happy about this.
>
> Thank you all very much.
>
> ------------
>
> Faith,
>
> Take a look at:
>
>
http://quark.fe.up.pt/mirror/www.exploratorium.com/snacks/bronx_cheer_
bulb.h
> tml
>
> Your student is referring to the "Bronx Cheer," or "rasberry" in
some
> circles. You can demonstrate it easily by looking at your monitor,
then:
> 1) Stick your tongue part way through your lips, 2) keep your lips
sealed
> around your tongue, and; 3) blow air. The screen will "wiggle." The
only
> thing moving is you.
>
> Chuck
>
> ****************************
> Charles M. Huffman, Ph.D.
> Chair, Psychology Department
> Cumberland College, Box 7990
> Williamsburg, KY 40769
> (606) 539-4422
> ****************************
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On
> Behalf Of Faith L Florer
> Sent: Thursday, November 04, 1999 8:24 AM
> To: [EMAIL PROTECTED]
> Subject: perception question
>
>
> Does anyone here know why it is that the numbers on a digital clock
(and
> some images on a television screen) appear to jiggle when a person
is
> using an electric toothbrush?
>
> I was asked this question in cognition class.
>
> Thank you.
>
> Faith Florer
>
> Faith Florer, Ph.D., Adjunct Asst. Professor Marymount College and
NYU.
> http://www.river.org/~flf/Faith.html
>
>
