Beth:
Does subliminal perception exist? You need to remember the
definition of the absolute threshold is that the probability of
reported detection of the stimulus is 50%. So, by the classical
definition, if you report you can detect the stimulus on 40% of
the trials then you are demonstrating subliminal perception of
that stimulus. But if you report detecting the stimulus on 60%
of the trials then you are not showing subliminal perception.
Ken
Oops, I think I hear the Signal Detection people commenting on
the classical definition. But, as it is only the first trial, I
am not sure and will attend to the consequences of my report.
Beth Benoit wrote:
Glad to have TIPS back!! Thanks, Bill!
One of my students posted the following, and I am trying to track down
the validity of this. So far I am unconvinced that there is any such
thing as subliminal advertising, but I remain a skeptic in all things.
http://www.telegraph.co.uk/science/science-news/6232801/Subliminal-advertising-really-does-work-claim-scientists.html
Researchers from the University College London found that subliminal
advertising actually works. Images flashed before us at speeds of up to
a fiftieth of a second can still be processed and affect our perception.
What I found to be most interesting about this article is that research
showed that we are most attune to negative images. Researchers suggest
this may be an evolutionary response to danger. “Clearly, there are
evolutionary advantages to responding rapidly to emotional information,”
said Professor Nilli Lavie, who led the research. “We can’t wait for our
consciousness to kick in if we see someone running towards us with a
knife or if we drive under rainy or foggy weather conditions and see a
sign warning ‘danger’.”
Beth Benoit
Granite State College
Plymouth State University
New Hampshire
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Kenneth M. Steele, Ph.D. [email protected]
Professor
Department of Psychology http://www.psych.appstate.edu
Appalachian State University
Boone, NC 28608
USA
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