Muscular-Metric Parameters.

<p>Individual ML threshold, intercept and slope parameters ± SE obtained by Logit glm fit describing the percentage of muscular activation (namely, PoolEmg > criterion) as function of upward force level presentation. R² emg values describe, per each subject, the explained variance of the Logit function used to account for the probability of PoolEmg > criterion at each force presented. An index of similarity (<i>R</i>^<i>2</i> <i>merged</i>) between the two metrics was defined as the goodness of fit of a Logit function explaining both perceptual and muscular probabilities merged together. Thus, R² merged represents the level of concordance between muscular and perceptual performances in describing the subjects’ decision about upward forces. Participants 6 and 9 were excluded from further analysis since Logit function could not reliably explained their probability of pooled muscular activation over criterion (R² ≈ 0). Similarly, subject 7 was excluded since his index of concordance between muscular activity and perceptual decisions was lower than 0.5.