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(A) Experimental Step length variability in controls, PD freezers and PD non-freezers (Almeida and Lebold, 2010), (B) Simulated Step length variability in controls, PD freezers and PD non-freezers. The significance between the conditions (Controls, PD freezers, PD non-freezers) and the cases (doorways: wide, medium, narrow) are reported with p < 0.05, N = 50.
