A data frame with 3000 observations on the following variables.
  ida factor with participant IDs
 
  triala numeric vector with trial numbers
 
  decka factor with the deck chosen on each trial (A-D)
 
  wagera factor indicating whether participants wagered low or high
 
  wina numeric variable with the amount won on each trial
 
  lossa numeric variable with the amount lost on each trial
 
  gdecka factor indicating whether the chosen deck was good/advantageous (TRUE) or not (FALSE)
 
  fdecka factor indicating whether the chosen deck has a relatively high frequency of losses (TRUE) or not (FALSE)