Numeracy and decision making. Peters, E., Västfjäll, D., Slovic, P., Mertz, C. K., Mazzocco, K., & Dickert, S. Psychological science, 17:407–413, May, 2006.
doi  abstract   bibtex   
A series of four studies explored how the ability to comprehend and transform probability numbers relates to performance on judgment and decision tasks. On the surface, the tasks in the four studies appear to be widely different; at a conceptual level, however, they all involve processing numbers and the potential to show an influence of affect. Findings were consistent with highly numerate individuals being more likely to retrieve and use appropriate numerical principles, thus making themselves less susceptible to framing effects, compared with less numerate individuals. In addition, the highly numerate tended to draw different (generally stronger or more precise) affective meaning from numbers and numerical comparisons, and their affective responses were more precise. Although generally helpful, this tendency may sometimes lead to worse decisions. The less numerate were influenced more by competing, irrelevant affective considerations. Analyses showed that the effect of numeracy was not due to general intelligence. Numerical ability appears to matter to judgments and decisions in important ways.
@Article{Peters2006,
  author          = {Peters, Ellen and Västfjäll, Daniel and Slovic, Paul and Mertz, C. K. and Mazzocco, Ketti and Dickert, Stephan},
  journal         = {Psychological science},
  title           = {Numeracy and decision making.},
  year            = {2006},
  issn            = {0956-7976},
  month           = may,
  pages           = {407--413},
  volume          = {17},
  abstract        = {A series of four studies explored how the ability to comprehend and transform probability numbers relates to performance on judgment and decision tasks. On the surface, the tasks in the four studies appear to be widely different; at a conceptual level, however, they all involve processing numbers and the potential to show an influence of affect. Findings were consistent with highly numerate individuals being more likely to retrieve and use appropriate numerical principles, thus making themselves less susceptible to framing effects, compared with less numerate individuals. In addition, the highly numerate tended to draw different (generally stronger or more precise) affective meaning from numbers and numerical comparisons, and their affective responses were more precise. Although generally helpful, this tendency may sometimes lead to worse decisions. The less numerate were influenced more by competing, irrelevant affective considerations. Analyses showed that the effect of numeracy was not due to general intelligence. Numerical ability appears to matter to judgments and decisions in important ways.},
  citation-subset = {IM},
  completed       = {2006-06-28},
  country         = {United States},
  doi             = {10.1111/j.1467-9280.2006.01720.x},
  groups          = {Moral learning by numbers},
  issn-linking    = {0956-7976},
  issue           = {5},
  keywords        = {Adult; Decision Making; Female; Humans; Intelligence; Male; Mathematics},
  nlm-id          = {9007542},
  owner           = {NLM},
  pii             = {PSCI1720},
  pmid            = {16683928},
  pubmodel        = {Print},
  pubstate        = {ppublish},
  revised         = {2011-05-20},
}

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