I researched this topic a little as it was related to work I was doing in my PhD 2-3 years ago. I’m mostly going from memory here. I think Kaufman is largely incorrect for skill learning in real-life. Walker et al. (2002) found sleep improved motor skill compared to the same amount of time spent awake, but a similar improvement was found after nightime sleep whether participants learned at 10 am or 10pm.
Possibly, Kauffman based his claim on Robertson’s studies which found interference between a motor skill task and a verbal task is minimized with sleep but Robertson doesn’t directly test the claim as I think he only tests the learn in the morning group after 12 hours but not 24 hours and I tend to be skeptical even of Robertson’s basic finding as when I was doing research on the topic independent researchers hadn’t replicated it http://www.jneurosci.org/content/27/39/10468.short.
I also found these articles that might be of interest:
The reference for the Robertson paper is: Brown, R. M., & Robertson, E. M. (2007). Off-line processing: reciprocal interactions between declarative and procedural memories. Journal of Neuroscience, 27(39), 10468-10475.
Finally, I’m curious what people make of the last paper psychs listed (“Testing Sleep Consolidation in Skill Learning: A Field Study Using an Online Game”). They didn’t find any evidence for a sleep consolidation effect over and above non-sleep breaks.
This is a very surprising result, and I’m not sure what to make of it.
They give some possible reasons for that result in the discussion section, but none of them reduce my surprise much.
I researched this topic a little as it was related to work I was doing in my PhD 2-3 years ago. I’m mostly going from memory here. I think Kaufman is largely incorrect for skill learning in real-life. Walker et al. (2002) found sleep improved motor skill compared to the same amount of time spent awake, but a similar improvement was found after nightime sleep whether participants learned at 10 am or 10pm.
Walker study: https://www.sciencedirect.com/science/article/pii/S0896627302007468
Possibly, Kauffman based his claim on Robertson’s studies which found interference between a motor skill task and a verbal task is minimized with sleep but Robertson doesn’t directly test the claim as I think he only tests the learn in the morning group after 12 hours but not 24 hours and I tend to be skeptical even of Robertson’s basic finding as when I was doing research on the topic independent researchers hadn’t replicated it http://www.jneurosci.org/content/27/39/10468.short.
I also found these articles that might be of interest:
https://academic.oup.com/sleep/article/40/4/zsx036/3765296
https://onlinelibrary.wiley.com/doi/full/10.1111/tops.12232
Overall, spacing your practice will be a much more significant variable than the time of day you practice.
Thank you! The Walker study is exactly what I was looking for.
For those following along at home, this is the relevant graph.
It looks like a sleep session produces a comparatively huge boost in skill performance, regardless of the timing of the practice.
Now I want to know if this has replicated for larger (or just other) samples.
A verbal task and a motor task can interfere with each other? I thought that interference only occurs between similar tasks.
The link for the Robertson paper is broken for me. Can you post the full title?
The reference for the Robertson paper is: Brown, R. M., & Robertson, E. M. (2007). Off-line processing: reciprocal interactions between declarative and procedural memories. Journal of Neuroscience, 27(39), 10468-10475.
Finally, I’m curious what people make of the last paper psychs listed (“Testing Sleep Consolidation in Skill Learning: A Field Study Using an Online Game”). They didn’t find any evidence for a sleep consolidation effect over and above non-sleep breaks.
This is a very surprising result, and I’m not sure what to make of it.
They give some possible reasons for that result in the discussion section, but none of them reduce my surprise much.