Document Detail


Ratio and difference comparisons of expected reward in decision-making tasks.
MedLine Citation:
PMID:  19015505     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Several models of choice compute the probability of selecting a given option by comparing the expected value (EV) of each option. However, a subtle but important difference between two common rules used to compute the action probability is often ignored. Specifically, one common rule type, the exponential rule, compares EVs via a difference operation, whereas another rule type, the power rule, uses a ratio operation. We tested the empirical validity of each rule type by having human participants perform a choice task in which either the difference or the ratio between the reward values was altered relative to a control condition. Results indicated that participants can compare expected rewards by either ratio or difference operations but that altering the ratio between EVs produces the most dramatic changes in behavior. We discuss implications for several related research fields.
Authors:
Darrell A Worthy; W Todd Maddox; Arthur B Markman
Related Documents :
21454855 - Asymmetrical interactions in the perception of face identity and emotional expression a...
24055595 - Cannabinoid modulation of prefrontal-limbic activation during fear extinction learning ...
23420655 - The amygdala and medial prefrontal cortex: partners in the fear circuit.
7532865 - Sequence-specific effects of neurokinin substance p on memory, reinforcement, and brain...
24004845 - The sweet side of inequality: how advantageous status modulates empathic response to ot...
21454855 - Asymmetrical interactions in the perception of face identity and emotional expression a...
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Memory & cognition     Volume:  36     ISSN:  0090-502X     ISO Abbreviation:  Mem Cognit     Publication Date:  2008 Dec 
Date Detail:
Created Date:  2008-11-18     Completed Date:  2009-04-29     Revised Date:  2014-03-25    
Medline Journal Info:
Nlm Unique ID:  0357443     Medline TA:  Mem Cognit     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1460-9     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Decision Making*
Humans
Models, Psychological*
Reward*
Grant Support
ID/Acronym/Agency:
MH077708/MH/NIMH NIH HHS; R01 MH077708-02/MH/NIMH NIH HHS
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Similar phenomena, different mechanisms: semantic and phonological false memories are produced by in...
Next Document:  Training and transfer effects in task switching.