Computational signatures of exertion and rest underlie moment-to-moment dynamics of subjective perceptions of effort and fatigue.

We note, however, that when random slopes on the main effect of effort and on the main effect of cumulative effort per participant were included in the model, which was associated with a lower AIC and BIC, the interaction of cumulative effort and effort was significant (χ 2 (1) = 8.694, p =.003) and the interaction of cumulative effort and reward was close to being significant (χ 2 (1) = 2.771, p =.096).

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