One of the most appreciated features of digital texts is the ability to
highlight text and add personal notes. Highlighted text and notes are
searchable, making it convenient to find those bits of information at a
later date. But I wonder how many Kindle users realize that their
highlights are being tracked...
Amazon's Kindle site has a fairly new interesting feature, where the highlighting done by users of Amazon Kindle, Kindle for iPhone and Kindle for iPad gets aggregated and reported. According to Amazon, "We combine the highlights of all Kindle customers and identify the
passages with the most highlights. The resulting Popular Highlights help
readers to focus on passages that are meaningful to the greatest number
of people." The passages listed have to be highlighted by at least 3 unique users, but most passages I was looking at had been highlighted hundreds of times, according to the little note underneath each one. I didn't see anything with more than 2000 highlights, though, which makes me wonder if they are aggregating the highlights of all users, or just specific ones.
I wonder about possible implication for digital textbooks. Might digital textbook publishers find a way to collect this data, and then report it out to students? I always hated buying a used textbook that was all highlighted, because I had no way of knowing if the previous owner was a moron. But if the number of people who highlight a passage is noted, that might add to my confidence that the most relevant bits have been picked out already.
In case you're interested, Kindle says that Dan Brown's The Lost Symbol is the most highlighted book of all time, followed by the Bible.
http://kindle.amazon.com/popular_highlights