RE: Subliminal advertising

From: Vincent Campbell (v.p.campbell@stir.ac.uk)
Date: Fri Apr 19 2002 - 11:31:58 BST

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From: Vincent Campbell <v.p.campbell@stir.ac.uk>
To: "'memetics@mmu.ac.uk'" <memetics@mmu.ac.uk>
Subject: RE: Subliminal advertising
Date: Fri, 19 Apr 2002 11:31:58 +0100
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            <That's probably 1/30 sec. But I thought that films then were shown
    at 24
    > frames per sec.
    >
    > And that is very close to threshold. The illusion of continuity starts
    > around 20 frames per sec.>
    >
            IIRC, silent film ran at 18 frames a second (partly why it looks
    funny today), whilst current film indeed runs at 24 fps. Transfers of film
    to TV, apparently change the frame rate slightly to 25 fps, which is why
    some long films run shorter on TV/video, without actually having been cut.
    (or so I read in a film magazine once).

            Vincent 

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