Figure 7
From: Task-relevant social cues affect whole-body approach-avoidance behavior
Exemplary trials for a participant encountering an angry face. Left: Trial for one subject leaning forward. Right: Trial of one subject leaning backward. Anterior–posterior displacement of the COP in cm (pos in blue) as a function of time for 2500 ms. Speed in cm/ms (red) as a function of time. The Grey horizontal line depicts the threshold of 0.01 cm/ms for reaction initiation. The black dotted line labeled “RT” indicates when this threshold has been reached (reaction time). Note that a postural lean in a particular direction is usually preceded by a small postural displacement in the opposite direction. This bi-phasic pattern emerges for biomechanical reasons and is related to the generation of momentum.
