TY - JOUR
T1 - Ventrolateral prefrontal cortex updates chosen value according to choice set size
AU - Fujiwara, Juri
AU - Usui, Nobuo
AU - Eifuku, Satoshi
AU - Iijima, Toshio
AU - Taira, Masato
AU - Tsutsui, Ken Ichiro
AU - Tobler, Philippe N.
N1 - Funding Information:
This research was supported by the Swiss National Science Foundation (PP00P1_128574, PP00P1_150739, and 00014_165884); the Swiss National Centre of Competence in Research in Affective Sciences; a Grant-in-Aid for Scientific Research (KAKENHI) from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT; nos. 17680027 and 19673002); a Grant-in-Aid for Scientific Research on Priority Areas from the MEXT (nos. 17022009, 18020005, and 20019005); an Academic Frontier Project for Private Universities at Nihon University; and a matching fund subsidy from the MEXT. J. F. was supported by a Global Center of Excellence Program at Tohoku University and an Institutional Program Fellowship for Overseas Visits of Young Researchers from the MEXT.
Publisher Copyright:
© 2017 Massachusetts Institute of Technology.
PY - 2018/3/1
Y1 - 2018/3/1
N2 - Having chosen an item typically increases the subjective value of the chosen item, and people generally enjoy making choices from larger choice sets. However, having too many items to choose from can reduce the value of chosen items— for example, because of conflict or choice difficulty. In this study, we investigated the effects of choice set size on behavioral and neural value updating (revaluation) of the chosen item. In the scanner, participants selected items from choice sets of various sizes (one, two, four, or eight items). After they chose an item, participants rerated the chosen item, and we quantified revaluation by taking the difference of postchoice minus prechoice ratings. Revaluation of chosen items increased up to choice sets of four alternatives but then decreased again for items chosen from choice sets of eight alternatives, revealing both a linear and a quadratic effect of choice set size. At the time of postchoice rating, activation of the ventrolateral pFC (VLPFC) reflected the influence of choice set size on parametric revaluation, without significant relation to either prechoice or postchoice ratings tested separately. Additional analyses revealed relations of choice set size to anterior cingulate and insula activity during actual choice and increased coupling of both regions to revaluation-related VLPFC during postchoice rating. These data suggest that the VLPFC plays a central role in a network that relates choice set size to updating the value of chosen items and integrates choice overload with value-enhancing effects of larger choice sets.
AB - Having chosen an item typically increases the subjective value of the chosen item, and people generally enjoy making choices from larger choice sets. However, having too many items to choose from can reduce the value of chosen items— for example, because of conflict or choice difficulty. In this study, we investigated the effects of choice set size on behavioral and neural value updating (revaluation) of the chosen item. In the scanner, participants selected items from choice sets of various sizes (one, two, four, or eight items). After they chose an item, participants rerated the chosen item, and we quantified revaluation by taking the difference of postchoice minus prechoice ratings. Revaluation of chosen items increased up to choice sets of four alternatives but then decreased again for items chosen from choice sets of eight alternatives, revealing both a linear and a quadratic effect of choice set size. At the time of postchoice rating, activation of the ventrolateral pFC (VLPFC) reflected the influence of choice set size on parametric revaluation, without significant relation to either prechoice or postchoice ratings tested separately. Additional analyses revealed relations of choice set size to anterior cingulate and insula activity during actual choice and increased coupling of both regions to revaluation-related VLPFC during postchoice rating. These data suggest that the VLPFC plays a central role in a network that relates choice set size to updating the value of chosen items and integrates choice overload with value-enhancing effects of larger choice sets.
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U2 - 10.1162/jocn_a_01207
DO - 10.1162/jocn_a_01207
M3 - Article
C2 - 29131745
AN - SCOPUS:85041435829
VL - 30
SP - 307
EP - 318
JO - Journal of Cognitive Neuroscience
JF - Journal of Cognitive Neuroscience
SN - 0898-929X
IS - 3
ER -