home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!ogicse!news.u.washington.edu!stein.u.washington.edu!hlab
- From: cdshaw@cs.ualberta.ca (Chris Shaw)
- Newsgroups: sci.virtual-worlds
- Subject: Re: SCI: Vr and Psychology
- Message-ID: <1992Nov16.030405.21349@u.washington.edu>
- Date: 14 Nov 92 03:33:40 GMT
- Article-I.D.: u.1992Nov16.030405.21349
- References: <1992Nov9.215820.10740@u.washington.edu>
- Sender: news@u.washington.edu (USENET News System)
- Organization: University of Alberta
- Lines: 40
- Approved: cyberoid@milton.u.washington.edu
- Originator: hlab@stein.u.washington.edu
-
-
-
- In article <1992Nov9.215820.10740@u.washington.edu>
- jsct+@andrew.cmu.edu (Joshua Eli Schachter) writes:
-
- >There also have been studies where a child is placed on a table. Below a
- >certain age, they will walk off the table (plexiglass was placed there so
- >it only looked like it wasnt there), but after that age they will not.
-
- This is not correct.
-
- The experiment to which you are referring is JJ Gibson's "Visual
- Cliff" experiments, in which very young animals are put on a
- plexiglass table in which one side has a checkerboard pattern that
- looks close (located at the table, top), while the other side has a
- two foot deep hole in it. That is, as you stand on the surface of the
- table, it looks like you're looking over the edge of a cliff, despite
- the fact that there is a plexiglass surface over top of this big hole.
-
- -------------------- <- plexiglass
- | |
- | | <- cliff edge
- |---------|
-
- All animals preferred to stay on the "safe" side of the cliff,
- including babies 1 day old, and kittens raised in total darkness until
- they were placed on the surface of the table. A blind animal shows no
- preference, and will roamall over the table, because it feels flat
- over the entire surface. However, it LOOKs like there's this big pit
- on one side.
-
- The purpose of the experiment was to determine if animals and people
- learn visual 3D perception or are born with it. The Visual Cliff shows
- fairly convincingly that animals have 3D visual perception at birth.
-
- -- Chris Shaw
- University of Alberta
- cdshaw@cs.UAlberta.ca
- CatchPhrase:
- Bogus as HELL !
-