I wonder if being able to refresh them by rehearsal means something like SRS?

According to Sweller, current evidence suggests that “we can process no more than about two to four elements at any given time with the actual number probably being at the lower [rather] than the higher end of this scale.” Those elements that we are able to hold in working memory will, moreover, quickly vanish “unless we are able to refresh them by rehearsal.”

Imagine filling a bathtub with a thimble; that’s the challenge involved in transferring information from working memory into long-term memory. By regulating the velocity and intensity of information flow, media exert a strong influence on this process. When we read a book, the information faucet provides a steady drip, which we can control by the pace of our reading. Through our single-minded concentration on the text, we can transfer all or most of the information, thimbleful by thimbleful, into long-term memory and forge the rich associations essential to the creation of schemas. With the Net, we face many information faucets, all going full blast. Our little thimble overflows as we rush from one faucet to the next. We’re able to transfer only a small portion of the information to long-term memory, and what we do transfer is a jumble of drops from different faucets, not a continuous, coherent stream from one source.