This Matlab datafile (4tu_data_previewdistraction.mat) contains all time signals
measured in the experiment that is published in the paper "Detecting Human
Distraction in Manual Control" at the 2025 IEEE SMC conference. In the 
experiment, data was collected from 10 participants who performed manual pursuit
and preview tracking tasks with an active secondary task (Surrogate Reference
Task (SuRT)) as either a "continuous" case (achieve a certain SuRT score) or a 
"prompted" (perform one SuRT task when prompted) case. Also non-distracted data
was collected.  

The datafile has the following internal structure:

- One separate data structure for each of the 10 experiment conditions (NOTE: 
  all characters in the condition description that match the condition symbol 
  are capitalized for clarity):
      PSN:   PurSuit, No distractions 
      PSDCE: PurSuit, Continuous Distractions, Easy
      PSDCH: PurSuit, Continuous Distractions, Hard
      PSDPE: PurSuit, Prompted Distractions, Easy
      PSDPH: PurSuit, Prompted Distractions, Hard
      PRN:   PReview, No distractions 
      PRDCE: PReview, Continuous Distractions, Easy
      PRDCH: PReview, Continuous Distractions, Hard
      PRDPE: PReview, Prompted Distractions, Easy
      PRDPH: PReview, Prompted Distractions, Hard
  These condition names are also included in the "str_conds" variable in the 
  .mat file.
  
- All data is sampled at 100 Hz with a measurement time of 120 seconds, 
  resulting 12000 samples for each time trace. Arrays contain data for 4 
  repeated measurements of all 10 participants. In each data structure the 
  following arrays holding all signal data can be found:

  Variable   Size        Unit  Description
  ------------------------------------------------------------------------------
  e          12000410  inch   Tracking error signal
  u          12000410  inch   Human operator control input (stick deflection)
  x          12000410  inch   Controlled system output
  ft         12000410  inch   Target signal to be followed
  fd         12000410  inch   Disturbance signal on controlled system
  fdist      12000410  0/1   Forced distraction moments (Prompted Distraction)
  mdist      12000410  0/1   Measured distraction moments (eye tracker)       
  mdist_raw  12000410  0/1   Raw measured distraction moments (eye tracker)
  t          120001     s     Time vector
  
    