Kathy Sierra and Burt Bates also used these types of fonts in their "Head First" series for O'reilly. I have never gotten into those books, but many people love them.
Now that is genuinely interesting. Of course, the raw data is hidden behind a paywall, so we don't really know that "significant" means to the author, or whether the test included slides or just raw text.
Still, this is one of those rare times when I could be right about looking professional (it looks cheesy, can't argue that) but completely wrong if it actually leads to higher retention.
Still, this is one of those rare times when I could be right about looking professional (it looks cheesy, can't argue that) but completely wrong if it actually leads to higher retention.