Format

Send to

Choose Destination
Neural Comput. 2014 Mar;26(3):467-71. doi: 10.1162/NECO_a_00559. Epub 2013 Dec 9.

Dopamine ramps are a consequence of reward prediction errors.

Author information

1
Department of Brain and Cognitive Sciences, MIT, Cambridge, MA 02139, U.S.A. sjgershm@mit.edu.

Abstract

Temporal difference learning models of dopamine assert that phasic levels of dopamine encode a reward prediction error. However, this hypothesis has been challenged by recent observations of gradually ramping stratal dopamine levels as a goal is approached. This note describes conditions under which temporal difference learning models predict dopamine ramping. The key idea is representational: a quadratic transformation of proximity to the goal implies approximately linear ramping, as observed experimentally.

PMID:
24320851
DOI:
10.1162/NECO_a_00559
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Atypon
Loading ...
Support Center