Theory 23/The rival is the same mechanism at another scale/Motor learning
Variability or Specificity?
The claim
Practice variability improves transfer at the cost of immediate performance.
01The rival explanation
Variable practice is simply less specific to the test, so it looks better on transfer only because the test is also variable.
02What would tell them apart
Use a fixed transfer test across conditions and vary only practice.
03Prediction
Transfer to a fixed test should still favour variable practice.
04Refutation
If the advantage vanishes on a fixed test, the rival wins.