>students spent less than 5 minutes on average using the internet for class-related purposes (e.g., accessing the syllabus, reviewing course-related slides or supplemental materials, searching for content related to the lecture)

I wonder if that could be skewed, because it only takes one request to pull up a course syllabus, but if I have Facebook Messenger open in another tab, it could be receiving updates periodically, leading to more time recorded in this experiment.