Reuters reports about the results of an interesting study here: Complexity causes 50% of product returns.
[...]Half of all malfunctioning products returned to stores by consumers are in full working order, but customers can’t figure out how to operate the devices[...]
[...]The average consumer in the United States will struggle for 20 minutes to get a device working, before giving up, the study found[...]
Surely this is also a topic for eLearning systems: Systems offering many possibilities to adapt to personal needs (a one-size-fits-all solution is not acceptable) almost inevitably become very complex and hard to use, and a user often needs to put more emphasis on learning how to use such a system properly instead of concentrating on his real purpose. So we need adaptive eLearning systems