Balloon Analog Risk Task

From PEBL WIKI
Jump to: navigation, search
Screen shot of PEBL's BART Task

Contents

[edit] About

PEBL implementation of a task originally by Lejuez, which is available for free download from http://www.addiction.umd.edu/CAPERWebSite/downloads.html 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
startballoonsize|10|
moneyperpump|0.05|
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

Personal tools
Namespaces

Variants
Actions
Navigation
Toolbox