A new study found that students are happy to use captions when learning new information. By testing two groups the researchers found a significant improvement in outcomes by those who had videos with captions vs. videos without captions. Instructors are encouraged to either source educational videos with captions already embedded, or get help from their institution to do it. Or even better, learn how to caption their own instructional videos. The title of the article is, Captioning Online Course Videos: An Investigation into Knowledge Retention and Student Perception.
Access the article via ResearchGate and request a copy of the paper. With more teaching and learning happening online, this is one technique that can benefit all. Captions are not just for people who are hard of hearing.
A similar study on the benefits of closed captions for learning was carried out by Oregon State University. They surveyed more than 2000 students in 15 institutions and found more than half said captions help by improving comprehension. The most common reasons for using captions were: to help them focus, retain information and overcome poor audio quality of the videos. Transcripts are often used as study guides and to find and retain information.