# Also in the Article

4. Relationship between responses to unpredictable and consistent, predictable perturbations
This protocol is extracted from research article:
Speech compensation responses and sensorimotor adaptation to formant feedback perturbations
J Acoust Soc Am, Feb 17, 2021;

Procedure

To evaluate the relationship between responses to unpredictable perturbations and to consistent, predictable perturbations, we compared the sensorimotor adaptation responses to consistent, predictable perturbations to the peak compensation responses to both types of unpredictable perturbations. Scatterplots were created for the comparisons of sensorimotor adaptation responses to responses to each of the unpredictable perturbation types (mid- and whole utterance). For each scatterplot, we fitted a linear mixed-effects model using the formula $adapt ∼ 1+unpredict+(1|participants)$, where $adapt$ represents sensorimotor adaptation response percentages and $unpredict$ represents peak compensation response percentages for unpredictable (either mid- or whole utterance) perturbations.

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