Do you use a laptop or tablet to take notes during school lectures or meetings? If so, you might want to reconsider pen and paper; there’s increasing evidence that using laptops during lectures decreases learning, which can result in lower grades, reports The New York Times.

To study this, researchers at Princeton University and the University of California asked a group of students to take notes at a lecture using pen and paper while another group used laptops. The experiment found that the students who used a laptop did not understand the lecture as well as those who wrote their notes out by hand. The researchers hypothesized that this was because students who wrote notes by hand had to process what the lecturer was saying and, in effect, summarize what was being said to keep up with the lecture. Additionally, they found that laptop note takers had a “tendency to transcribe lectures verbatim,” which mean they were less likely to process information into their own words, thus preventing them from truly understanding what was being taught.

Ungated versions of articles cited in my NYT column on laptops in lectures 1/3



1) lab experiment on using laptops for noteshttps://t.co/gIeSOYtLSz pic.twitter.com/zskFG146rd — Prof Dynarski (@dynarski) November 26, 2017

Another study by researchers at York University and McMaster University tested students by asking them to look up things on their laptop that were unrelated to their lecture, like cinema session times. Unsurprisingly, the distraction caused them to remember less of the lecture, and those sitting near them were adversely affected too.

Lastly, a study from the United States Military Academy tested students’ achievements in an economics class by comparing student performance based on whether laptops or tablets were restricted, unrestricted, or not permitted at all. The study found that the students who did not have access to a device performed significantly better than those who did.

Writing things by hand is becoming less common as gadgets and speech recognition software continue to replace pen and paper, but it’s long proven that handwriting improves motor skills, memory, and creativity. So even though note taking with a laptop might be faster, you might want to think about how much information you’re retaining.