Balloon Analog Risk Task

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Screen shot of PEBL's BART Task


[edit] About

PEBL implementation of a task originally by Lejuez, which is available for free download from Users may prefer PEBL version because of ability to tweak, change sampling characteristics, or to integrate with other PEBL tasks.

[edit] Notes

This task is located in battery/BART/BART.pbl

This is a fairly straight-forward implementation of the task. It includes animation and sound playback for a more engaging task.

[edit] Options

Variables that can impact the task, settable in the launcher:

allowAutoPump|0|Does the balloon continue to pump while holding the button down? 1=yes,0=no
life1|8|Mean breaking point for the first balloon type
life2|16|Mean breaking point for the second balloon type
life3|128|Mean breaking point for the third balloon type
use1|1|Whether to use balloon type 1 (orange)
use2|1|Whether to use balloon type 1 (Gold/yellow)
use3|1|Whether to use balloon type 1 (blue)
trialsperset|10|Number of balloons in each set.
phase1|1|Whether to use the Phase-1 style trials (mixed)
phase2|1|Whether to use the Phase-2 style trials (blocked)
minpumps|0| the minumum number of pumps before the mean breakpoint starts counting.  
            If this is used, the mean breakpoint will be minpumps+life1/life2/life3

To change the colors of the balloons, use a standard color name or MakeColorRGB in the following line in the bart.pbl file:

   ##Colors for the three balloon types:
   cols <- [MakeColor("darkorange"),Makecolor("gold"),MakeColor("darkslateblue")]

[edit] Data Output

Data are saved into a .csv file with the following columns:

subnum	trial	type	life	pumps	total	collected	burst	time
  • subnum: participant code given
  • trial: trial number
  • type: balloon type (color); 1=orange, 2=gold, 3=blue
  • life: number of lives the particular chosen balloon would have if pumped until burst
  • pumps: number of pumps given
  • total: total amount of money earned
  • collected: amount collected on that trial
  • burst: whether the balloon burst
  • time time (in ms) spent on the trial

[edit] References

Lejuez, C. W., Read, J. P., Kahler, C. W., Richards, J. B., Ramsey, S. E., Stuart, G. L., Strong, D. R., & Brown, R. A. (2002). Evaluation of a behavioral measure of risk-taking: The Balloon Analogue Risk Task (BART). Journal of Experimental Psychology: Applied, 8, 75-84.

[edit] See Also

PEBL Test Battery

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