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Rhythmic movement coordination exhibits characteristic patterns of stability, specifically that movements at 0° mean relative phase are maximally stable, 180° is stable but less so than 0°, and other coordinations are unstable without training. Recent research has demonstrated a role for perception in creating this pattern; perceptual variability judgments covary with movement variability results. This suggests that the movement results could be due in part to differential perceptual resolution of the target movement coordinations. The current study used a paradigm that enabled simultaneous access to both perception (between-trial) and movement (within-trial) stability measures. A visually specified 0° target mean relative phase enabled participants to produce stable movements when the movements were at a non-0° relationship to the target being tracked. Strong relationships were found between within-trial …