Lissajous Feedback: Augmentative or Transformative?

|Series| Feedback Techniques

What is Augmented Feedback?

Influenced by the work of Schmidt & Wrisberg (2008) and Utley & Astill (2008), Augmented Feedback (AF; also known as extrinsic feedback) has been defined as,

“Information that cannot be elaborated without an external source; thus, it is provided by a trainer or a display” (Sigrist, Rauter, Riener, & Wolf, 2013).

Within this definition, the only time that feedback is not augmented is when it is generated by the organism itself. To help unpack this definition, I will introduce an example inspired by the world of sport.

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Lissajous Feeback: What is it?

|Series| Feedback Techniques

What is Lissajous Feeback?

All forms of feedback within coordinated rhythmic movement (CRM) are used to guide learning. Lissajous feedback is no different to other forms of feedback in this regard. It is, however, fundamentally different in how it achieves this goal.

Central to the technique is the use of a Lissajous figure (hence the name). A Lissajous figure is a continuous, 2-dimensional plot of the relative motions of the two limbs. The right arm follows the abscissa (representing X-axis/horizontal-axis on the Lissajous figure) and the left arm follows the ordinate (representing Y-axis/vertical-axis on the Lissajous figure).

Continue reading “Lissajous Feeback: What is it?”