Here you can change the enforcement scheme: Each deck earns the participant either 100 or 50 point
for every card drawn from it. Each deck is also associated with a loss scheme, see
Bechara et al., (2005).
For instance, in the original
task, deck A is associated with always winning 100 point, but a chance of 0.5 to loose a relatively small
amount of points, which totals 1250 for every 10 cards selected from this deck. To implement this
enforcement scheme we assign to 5 cards (50% of 10) the loss 0, to 5 other cards more or less evenly distributed
losses that total 1250; that is, with deck A we might associate the reward scheme loss sequence: 0, 0, 0, 0, 0, 150,
200, 250, 300, 350. Each deck needs to be associated with a reinforcement scheme. The default schemes are
as those used by Bechara et al. in the original version of the task.
The number of trials (rounds of card selection) that a participant has to complete must be set (defaults to
100). To create 100 trials from the 10 elements in the example loss sequence, the loss sequence needs to be
repeated 10 times. (Another example: If 84 trials are required and the loss sequence consists of 6 loss
values, then the loss sequence should be repeated 84/6=14 times.) Note: Specifying one long sequence,
(e.g., all 100 loss values for each deck) is not equivalent to specifying a short loss sequence of 10 values, and
repeating that sequence 10 times: Each repeated version of the sequence is shuffled on its own—this
guarantees that every 10 cards chosen from deck A a loss of 1250 points will be suffered, which may not be the
case if a single long loss sequence is shuffled.