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Table 3 Evaluation of the two criteria for each metric

From: Metrics for describing dyadic movement: a review

Metric Criterion
  C1: Practical use C2: Dependence on parameters / assumptions
  Attainable range Interpretation for joint movement Sensitivity to  
    P C Direction C Speed  
Prox Yes From always distant (0) to always close (1) High Low Low User tractable (ad hoc definition of distance threshold)
Cs No Difficult: i) negative value close to 0 difficult to interpret; ii) series-length dependent Medium Medium Low Not user tractable (null hypothesis of independent movement)
HAI Yes From always distant and out of SAB at least for one individual (0) to always close and in SAB (1) Low Low Medium Not user tractable (reference area and distance threshold)
L ixn T Yes Same as HAI Low Low Medium Not user tractable (reference area)
j P P A Yes From no (0) to permanent (1) potential overlap High Low Low User tractable (maximum velocity)
C S E M Yes From highly synchronous (0) to asynchronous (1) High Low Low User tractable (distance threshold)
r V Yes From anticorrelated (-1) to correlated (1) Low High* High* No dependence
D I d Yes From opposite (-1) to cohesive (1) movement in displacement Low Low High User tractable (weighting coefficient for similarity in displacement)
D I θ Yes From opposite (-1) to cohesive (1) movement in azimuth Low High Low No dependence
DI Yes From opposite (-1) to cohesive (1) movement in both mixed displacement and azimuth effects Low High Low User tractable (weighting coefficient for similarity in displacement)
  1. Note: P =Proximity, Cspeed= coordination in speed, Cdirection= coordination in direction, S = reference area. *Depending on v (see section on case scenarios). Text in bold correspond to positive attributes