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. 2020 Jul 22;11:1532. doi: 10.3389/fpsyg.2020.01532

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Copyright © 2020 Sandeep, Shelton, Pahor, Jaeggi and Seitz.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Graphical representation of the system. A block's value corresponds to a single node in the model. This is shown in the top portion of the figure, where y_t, the accuracy achieved at time t, and z_t, the presented n-level of the task at time t, are for a single block and that translates into a node in the model. The bottom is the graphical representation of the hidden Markov model. The arrows represent direct conditional dependencies among the modeled variables. The state transition model (from x_t−1 to x_t) is described in section 3.2.3.