In the New York Times, Susan Dynarski argues that students learn less when they use laptops, tablets and the like during lectures.
… a growing body of evidence shows that over all, college students learn less when they use computers or tablets during lectures. They also tend to earn worse grades. The research is unequivocal: Laptops distract from learning, both for users and for those around them. It’s not much of a leap to expect that electronics also undermine learning in high school classrooms or that they hurt productivity in meetings in all kinds of workplaces.
She points to studies arguing that “laptop note takers’ tendency to transcribe lectures verbatim rather than processing information and reframing it in their own words is detrimental to learning” and “multitasking on a laptop poses a significant distraction to both users and fellow students.”
Previous blog post.