If you are looking for specific academic papers, you might search for these key terms on Google Scholar or ERIC :
: Look for work by researchers like Brij Kothari , who has extensively documented how subtitling popular media can improve mass literacy. Kids subtitles English
OpenSubtitles: A massive database for TV and movie subtitles. Addic7ed: Often used for TV show subtitles. If you are looking for specific academic papers,
: Many studies indicate that subtitles act as a "stealth" reading lesson. Children often find it difficult to ignore text on a screen, leading to improved word recognition and reading speed. Kids subtitles English