Figure 2
From: The sensory feedback mechanisms enabling couples to walk synchronously: An initial investigation
(A) Snapshots taken during a tactile feedback (handholding) trial that received a score of 3.0 (good in-phase synchrony). Note how the heel-strike and toe-off of both walking partners occur simultaneously. (B) Snapshots of the same couple shown in (A) during a no feedback trial that received a score of -0.5 (poor synchrony). A suggestion of out-of-phase synchrony can be observed in the left and right panels, but this is not consistent (see middle panel).