Burstall, C. (1975). French in primary school: The British experiment. The Canadian Modern Language Review, 31(5), 388-402.
Cook, V. (1997). Monolingual bias in second language acquisition research. Revista Canaria De Estudios Ingleses, 34, 35–50.
Cook, V. (2016). Where is the native speaker now? TESOL Quarterly, 50(1), 186–189. https://doi.org/10.1002/tesq.286.
Cherry, K. (2020, May 3). A simply DIY short-term memory experiment. Verywell Mind. Retrieved December 4, 2021, from https://www.verywellmind.com/a-short-term-memory-experiment-2795664.
Hartshorne, J.K., Tenenbaum, J.B., & Pinker, S. (2018). A critical period for second language acquisition: Evidence from 2/3 million English speakers. Cognition, 177, 263-277.
Indeed Editorial Team. (2020, November 23). Problem-solving skills: Definitions and examples. Indeed. Retrieved December 4, 2021, from https://www.indeed.com/career-advice/resumes-cover-letters/problem-solving-skills.
Lightbown, P. M., & Spada, N. (2020). Teaching and learning L2 in the classroom: It's about time. Language Teaching, 53(4), 422–432. https://doi.org/10.1017/s0261444819000454.
Lightbown, P. M., & Spada, N. (2021). How Languages are Learned (5th ed.). Oxford University Press.
Lyons, D. (2021, March 10). How many people speak English, and where is it spoken? Babbel Magazine. Retrieved December 4, 2021, from https://www.babbel.com/en/magazine/how-many-people-speak-english-and-where-is-it-spoken.
Newport, E. (1990). Maturational constraints on language learning. Cognitive Science, 14(1), 11-28.
Ormrod, J. E., Saklofske, D. H., Schwean, V. L., Andrews, J. J., & Shore, B. M. (2008). Principles of Educational Psychology (2nd ed.). Pearson Education.
Patkowski, M. (1980). The sensitive period for the acquisition of syntax in a second language. Language Learning, 30(2), 449-472.
Psynso Inc. (n.d.). Critical period hypothesis. Psynso. Retrieved December 5, 2021, from https://psynso.com/critical-period-hypothesis/.
Society for Neuroscience. (n.d.). Test your problem-solving skills. BrainFacts.org. Retrieved December 4, 2021, from https://www.brainfacts.org/core-concepts/reasoning-planning-and-solving-problems/reasoning-planning-and-solving-problems-interactive.
Snow, C. & Hoefnagel-Hohle, M. (1978). The critical period for language acquisition: Evidence from second language learning. Child Development, 49(4), 1114-1128.
WIRED. (2021, January 21). Accent expert gives a tour of U.S. accents - (part one) | WIRED
[Video]. Youtube. https://www.youtube.com/watch?v=H1KP4ztKK0A.