[1] Cepeda, Pashler, Vul, Wixted & Rohrer. (2006). Distributed practice produces superior long-term retention. Psychological Bulletin, 132(3), 354–380.
[2] Ye & Julien Roussel. (2024). FSRS-6 outperforms SM-2 across 20 million reviews. Open Spaced Repetition Project.
[3] Laufer & Hill. (2000). Sentence context increases depth of lexical processing. Language Learning & Technology, 3(2), 58–76.
[4] Hulstijn. (1993). L1-mediated learning activates broader semantic networks. Studies in Second Language Acquisition, 15(2).
[5] Roediger & Karpicke. (2006). Testing effect: active recall beats re-reading by 50%. Psychological Science, 17(3), 249–255.
[6] Baddeley. (1986). Audio reinforcement creates a dual-coded memory advantage. Working Memory, Oxford University Press.
[7] Rogers, Kuiper & Kirker. (1977). Personalised content is recalled 40–60% more reliably. Journal of Personality & Social Psychology, 35(9).
[8] Cahill, Prins, Weber & McGaugh. (1994). Emotional context enhances hippocampal consolidation. Nature, 371, 702–704.
[9] Nation. (2001). 3,000 high-frequency words unlock 95% of everyday speech. Learning Vocabulary in Another Language, CUP.