TY  - JOUR
A1  - Sebold, Miriam Hannah
A1  - Schad, Daniel
A1  - Nebe, Stephan
A1  - Garbusow, Maria
A1  - Juenger, Elisabeth
A1  - Kroemer, Nils B.
A1  - Kathmann, Norbert
A1  - Zimmermann, Ulrich S.
A1  - Smolka, Michael N.
A1  - Rapp, Michael Armin
A1  - Heinz, Andreas
A1  - Huys, Quentin J. M.
T1  - Pavlovian-to-Instrumental Transfer Effects Rely Less on Model-based Reinforcement Learning
JF  - Journal of cognitive neuroscience
N2  - Behavioral choice can be characterized along two axes. One axis distinguishes reflexive, model-free systems that slowly accumulate values through experience and a model-based system that uses knowledge to reason prospectively. The second axis distinguishes Pavlovian valuation of stimuli from instrumental valuation of actions or stimulus–action pairs. This results in four values and many possible interactions between them, with important consequences for accounts of individual variation. We here explored whether individual variation along one axis was related to individual variation along the other. Specifically, we asked whether individuals' balance between model-based and model-free learning was related to their tendency to show Pavlovian interferences with instrumental decisions. In two independent samples with a total of 243 participants, Pavlovian–instrumental transfer effects were negatively correlated with the strength of model-based reasoning in a two-step task. This suggests a potential common underlying substrate predisposing individuals to both have strong Pavlovian interference and be less model-based and provides a framework within which to interpret the observation of both effects in addiction.
Y1  - 2016
U6  - https://doi.org/10.1162/jocn_a_00945
SN  - 0898-929X
SN  - 1530-8898
VL  - 28
SP  - 985
EP  - 995
PB  - MIT Press
CY  - Cambridge
ER  -