Online vs hard copy, which texts are students more likely to read? I am wondering if anyone knows of any studies that indicate whether students read online texts more or less than hard copy texts.

I am in the midst of trying to "reboot" the intro stats class I teach and a big question in my mind is how effective the text is. Active learning (like the flipped classroom) requires the students read the material beforehand, and I'm not convinced (from the results I saw this year using a Pearson Learning Management System (LMS)) that the students are reading the online text very much.

I have a suspicion that students read the online texts less (and I plan to give my students a survey to check) but I'd like to know if there is any research supporting my limited observations.
This recent literature review goes over some of the research on print versus screen reading.

It looks like in real-world situations there are no significant differences in grades between e-textbooks and print textbooks even though some laboratory studies show that content reading works better from print and that some students tend to prefer print.

In contrast, course reserve books are more likely to be accessed if they're e-books rather than print books. 

Practically, it may be worthwhile to give students a "tour" of the ebook to make sure they know how to use it, and/or to design quizzes or activities that require students to know/use the textbook material.