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. Author manuscript; available in PMC: 2018 Jan 1.
Published in final edited form as: Neurorehabil Neural Repair. 2016 Aug 10;31(1):95–104. doi: 10.1177/1545968316662526

Figure 2.

Figure 2

Skill acquisition follows an exponential decay as performance improves. Fitting RMSE data extracted from a motor skill practice to the function, E(RMSEN) = A + B−αN, produced practice parameters based on the nonlinear decay of performance during skill acquisition. E(RMSEN) is the expected value of RMSE on practice trial N; A is the expected value of RMSE after practice has been completed (asymptote parameter); B is the change in the expected value of RMSE from the beginning of practice to the end of practice (change score parameter); Alpha (α) is the exponential rate parameter.27 Data shown here were derived from a sample HC participant.