Trajectories: structure array of data from target-hitting task phase of the experiment. Data describe the entire movement trajectory of each trial. 
   --18 rows (1 for each subject)
   --4 fields:
         1) ProcControlSig: normalized processed control signal applied as input to the cursor
         2) Time (seconds): running continuously throughout experiment
         3) CursorPos (degrees): position of the cursor on the circle track
         4) TargetPos (degrees): position of the target on the circle track
         
   --Each entry of the structure holds a cell array with 75 rows (1 row is a single trial)
      and 3 columns (each column is data from using a different control signal--column 1 Torque, column 2 is Torque+Noise, and column 3 is EMG)
         

AFC: structure array of data from 2-alternative forced choice phase of the experiment
   --18 rows (1 for each subject)
   --2 fields:
         1) Stimulus: perturbation size (degrees)
         2) Decision: subject decision on which trial was perturbed (1 for a correct decision, 0 for incorrect)
   --Each entry of the structure holds a cell array with 3 columns (column 1 is Torque, column 2 is Torque+Noise, and column 3 is EMG)

ProcessedData: data summary from both phases of experiment
   --6 fields:
         1) Control Signal used: 1 is Torque, 2 is Torque+Noise, 3 is EMG
         2) JND: just noticeable difference from 2AFC phase
         3) SNR: signal-to-noise ratio from target-hitting phase
         4) MeanAbsError_all: mean absolute error from all trials of the target-hitting phase
         5) MeanAbsError_last8: mean absolute error from the last 8 trials of the target-hitting phase
         6) Subject

   --Each array is 54x1 (18 subjects x 3 protocols each = 54)