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Around the Internet, especially in social media, we see examples of hyperlinks in a common format that has been cynically dubbed "click bait" or "link bait".

The idea is that authors publish these links with evocative titles, trying to entice a casual browser into clicking the link and viewing the content (where the resultant loading of the advertisements presumably earn some small amount of money for the content provider).

Some examples of click bait (with links removed, to protect everyone's sanity) are:

  • Watch out, these 15 baby penguins are waddling off to steal your heart.
  • 31 creative life hacks every girl should know
  • 20 Powerful D-Day Photos On The 70th Anniversary Of The Invasion
  • 11 Sexy Star Wars Tattoos

Many of these kind of links use provocative phrasing, like "you won't believe" and "will shock you". I can see intuitively why this works to entice people to click the link.

What is the reason for giving a number, like in the examples? Is there any psychology involved in this trend?


This question comes from someone who doesn't really know anything about psychology or cognitive science; I'm just interested.

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I'm not sure the cognitive psychology tag is appropriate. I also suspect the numbers have more to do with the fact that the "x things every y should z" format is an easy format to write. In other words, I think the numbers have more to do with content creation more than link-baiting. –  blz Jun 9 at 7:44
    
@blz Can you suggest a more appropriate tag? I'm really fumbling in the dark here. –  anthony-arnold Jun 9 at 7:46
    
It may also be an appealingly easy format to read. The fact that BuzzFeed/Cracked.com/etc.-style lists are catchy surely isn't lost on the audience either. Arguably it also implies some depth to the topic that one wouldn't (/shouldn't) expect. I sure wouldn't be able to come up with that many sexy Star Wars tattoos off the top of my head...but have you ever noticed how inaccurate those numbers can be, or how often the articles are stuffed with ill-fitting content? I suspect there's some motive to inflate the numbers such as the implication of information richness. –  Nick Stauner Jun 9 at 7:48
    
It's also a way to drive up ad-views, since the list is often spread out over several pages. –  Josh Jun 9 at 20:57
    
The number makes the user feel in control. He knows how much information he will get. The user knows that he can read 15 facts that xxx in less than 5 minutes (his procastination break). –  Sebastian Schmitz Jun 10 at 11:36

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