Sources and further reading

Underlying research for Why your range game stays on the range.

These are the foundational references behind the argument. Both academic and accessible — pick the ones that match your appetite.

Block vs. variable practice

Battig, W. F. (1979). The flexibility of human memory. In L. S. Cermak & F. I. M. Craik (Eds.), Levels of Processing in Human Memory. Erlbaum.
Shea, J. B. & Morgan, R. L. (1979). Contextual interference effects on the acquisition, retention, and transfer of a motor skill. Journal of Experimental Psychology: Human Learning and Memory, 5(2).
Schmidt, R. A., Lee, T. D., Winstein, C. J., Wulf, G., & Zelaznik, H. N. (2018). Motor Control and Learning: A Behavioral Emphasis (6th ed.). Human Kinetics.

Desirable Difficulties

Bjork, R. A. (1994). Memory and metamemory considerations in the training of human beings. In Metcalfe & Shimamura (Eds.), Metacognition: Knowing about Knowing. MIT Press.
UCLA Bjork Learning & Forgetting Lab — ongoing research and accessible summaries.

Internal vs. external focus

Wulf, G. (2013). Attentional focus and motor learning: A review of 15 years. International Review of Sport and Exercise Psychology, 6(1).
Wulf, G., Lauterbach, B., & Toole, T. (1999). The learning advantages of an external focus of attention in golf. Research Quarterly for Exercise and Sport — the golf-specific application.

Pressure and choking

Beilock, S. (2010). Choke: What the Secrets of the Brain Reveal About Getting It Right When You Have To. Free Press — the most accessible popular treatment.
Underlying experimental research in working memory + skill execution: see Beilock & Carr (2005) and related papers from her lab.

Tour caddie perspective

Williams, S. (2015). Out of the Rough: Inside the Ropes with the World’s Greatest Golfers. Penguin Books.
Mackay, J. “Bones” — Hey, Bones (PGA Tour Radio, SiriusXM). Long-form interviews and reflections on his years on the bag.