Repetitive Warnings Don’t Work

I knew it all along: Annoyed by public address messages? Now experts say they don't even work.

They are the inescapable accompaniment to life in Britain – the repetitive public address messages at railway stations, airports and shopping centers.
Now, experts say the constant barrage of announcements is actually counter productive.
They warn that in many places, messages are broadcast with such frequency that their actual meaning is blocked out by listeners, in a psychological phenomenon known as "habituation".
Judy Edworthy, a professor in applied psychology at Plymouth University, said: "People habituate to any kind of stimulus and eventually filter it out and the same thing happens with warnings and announcements.
"It is rather like crying wolf – people get warning fatigue. It means people could actually be at more risk of what they are being warned about."

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