Interactive Locomotion

The dataset is made up of full-body kinematics data of 6 subjects performing
two main tasks:

- walking alone (Solo Trial);

- walking together with another subject while mechanically coupled

through a stretcher-like object (Paired Trial).

Data were collected by using the VICON system with 14 infrared bonita camera.
Subjects were fully instrumented by 34 passive markers placed according to the
Plug-In-Gait marker placement.

The stretcher like object used to mechanically coupled a pair of subjects was also
instrumented with 6 markers in order to detect its position during the trials.

The experiment parameters and subject metadata are provided in the files
Subject_Disposition.xlsx and Database_Subjects_CoMTrajectory.xlsx. The trajectory
of each marker placed on each subject within a pair is stored in Pair*.mat while
the trajectory and the velocity of the CoM for each subject evaluated at each gait
cycle can be found in CoM_trajectories and CoM_velocities.

In detail:

- Pair*.mat: For each pair (*=1,2,3,...,7), the cells represent the trials
performed by the pair. By opening one cell (trial) it is possible to find
several fields. The relevant one is the ‘DATA’ field (hdl*{1,#trial}.DATA)

where it is possible to find several parameters related to the Subject in
front of the stretcher (1) or behind it (2), For simplicity we will refer only
to the Subject in front to explain the rest of the fields (same can be said
for the Subject behind just by replacing 1 with 2 or A with B). The main
field to be analyzed are:

o hdl*{1,#trial}.DATA.Pos1->it contains all the markers’ trajectories,
related to markers on the right (R) or on the left (L) or in the
center (C).

o hdl*{1,#trial}.DATA.CoMs01A.C.CoM->it contains CoM trajectory

o hdl*{1,#trial}.DATA.CoM_Table->it contains Table CoM trajectory.
- CoM_trajectories: each field is a Subject that is identified by a number

(pair to which he/she belongs) and a letter A/B to indicate whether the
subject is in front of the stretcher (A) or behind (B).

o COM_GCT.Subject**.Single->contains a nuber of cells
corresponding to the total number of trials that the Subject** did
during the ‘Solo Trial’. Since some of the 6 analyzed subjects can
compare in different pairs or in the same pair but in different
position, in order to map the subject inside a pair to the real
subject (whose parameters are stored in
Database_Subjects_CoM_Trajectory.xlsx) please refer to
Subject_Disposition.xlsx. In each trial one can access to the COM
traejectory along the forward direction;

oCOM_GCT.Subject**.Coupled ->contains a nuber of cells
corresponding to the total number of trials that the Subject** did
during the ‘Paired Trial’; In each trial one can access to the COM
traejectory along the forward direction;

o COM_GCT.Subject**.Media->it is the mean CoM trajectory for both
Single and Paired trials.

- CoM_velocities: same scheme of CoM_trajectories.