Event-Related Potentials Reveal Differential Brain Regions Implicated in Discounting in Two Tasks
The way people make decisions about future benefits termed discounting - has important implications for both financial planning and health behaviour. Several theories assume that, when delaying gratification, the lower weight given to future benefits (the discount rate) declines exponentially. However there is considerable evidence that it declines hyperbolically with the rate of discount being proportionate to the delay distance. There is relatively little evidence as to whether neural areas mediating timedependent discounting processes differ according to the nature of the task. The present study investigates the potential neurological mechanisms underpinning domain-specific discounting processes. We present high-density event-related potentials (ERPs) data from a task in which participants were asked to make decisions about financial rewards or their health over short and long time-horizons. Participants (n=17) made a button-press response to their preference for an immediate or delayed gain (in the case of finance) or loss (in the case of health), with the discrepancy in the size of benefits/losses varying between alternatives. Waveform components elicited during the task were similar for both domains and included posterior N1, frontal P2 and posterior P3 components. We provide source dipole evidence that differential brain activation does occur across domains with results suggesting the possible involvement of the right cingulate gyrus and left claustrum for the health domain and the left medial and right superior frontal gyri for the finance domain. However, little evidence for differential activation across time horizons is found.
|Date of creation:||17 Apr 2008|
|Contact details of provider:|| Postal: Arts Annexe, Belfield, Dublin 4|
Phone: +353 1 7164615
Fax: +353 1 7161108
Web page: http://www.ucd.ie/geary/
More information through EDIRC
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- McCabe, Kevin & Houser, Daniel & Ryan, Lee & Smith, Vernon & Trouard, Ted, 2001. "A Functional Imaging Study of Cooperation in Two-Person reciprocal Exchange," MPRA Paper 5172, University Library of Munich, Germany.
- Ted O'Donoghue & Matthew Rabin, 1996.
"Doing It Now or Later,"
1172, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- O'Donoghue, Ted & Rabin, Matthew, 1997. "Doing It Now or Later," Department of Economics, Working Paper Series qt7t44m5b0, Department of Economics, Institute for Business and Economic Research, UC Berkeley.
- Ted O'Donoghue and Matthew Rabin ., 1997. "Doing It Now or Later," Economics Working Papers 97-253, University of California at Berkeley.
- Brocas, Isabelle & Carrillo, Juan D, 2001. "Rush and Procrastination under Hyperbolic Discounting and Interdependent Activities," Journal of Risk and Uncertainty, Springer, vol. 22(2), pages 141-164, March.
- Shane Frederick & George Loewenstein & Ted O'Donoghue, 2002. "Time Discounting and Time Preference: A Critical Review," Journal of Economic Literature, American Economic Association, vol. 40(2), pages 351-401, June.
- Colin F. Camerer & George Loewenstein & Drazen Prelec, 2004. "Neuroeconomics: Why Economics Needs Brains," Scandinavian Journal of Economics, Wiley Blackwell, vol. 106(3), pages 555-579, October. Full references (including those not matched with items on IDEAS)
When requesting a correction, please mention this item's handle: RePEc:ucd:wpaper:200811. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Geary Tech)
If references are entirely missing, you can add them using this form.