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Values of {XR; k}, the related pair of variables for the spatial referent coordinate and apparent stiffness, for a representative subject at the hand level (top) and individual finger level (bottom) in the no-feedback condition. Triangles represent {XR; k} pairs recorded under full visual feedback; circles represent pairs recorded after feedback alteration. Best hyperbolic fits are represented with solid (visual feedback) or dashed (altered feedback) lines.
