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5 statistical tests used (binomial test, Spearman rank correlation, one-sample t test, likelihood ratio test) were considered significant at p<0.05. ... We quantified the animal's choice from the probability of choosing one option over its alternative,

Economic choices are largely determined by two principal elements, reward value (utility) and probability. ... Therefore, we investigated economic choices in macaque monkeys for evidence of probability distortion.

including 6 neuronsfrom the binary tests), as defined by significant activity differencebetween one task epoch and pretrial control (P < 0.01; pairedWilcoxon test and one-factor ANOVA). ... 13) (P < 0.05; t test) during binary choice between two nonzero

be consistent with the measured value rankings, these tests didnot reveal numerical values. ... S9 B and C, P < 0.0001, Wil-coxon rank-sum test). Regression of neuronal responses to alltested rewards onto the prediction errors in economic value washighly

However, the extent to which the amygdalaitself codes information about economic choices is unclear. ... In another test, we evaluated whetherchoice coding remained constant over changes in interest rate.

Every reward or economic good has mul-tiple components, attributes, or dimensions and, thus, constitutes abundle. ... We calculated the instantaneouschoice probability at each test step, separately above and below theIP, as:.

Future experiments with more daily trials of agiven test might dissociate between these factors. ... ferred the third-order stochastically dominant gamble (P < 106for both monkeys, two-tailed binomial test; Fig.

A significant ROC indicated discrimination (permutation test with2,000 iterations; P < 0.05). ... S5–S16 (for fulldetails of the STP, see SI Text). Computer Control Test.

1625BOLD CORRELATES OF ECONOMIC PARAMETERS. J Neurophysiol • VOL 97 • FEBRUARY 2007 • www.jn.org. ... 1627BOLD CORRELATES OF ECONOMIC PARAMETERS. J Neurophysiol • VOL 97 • FEBRUARY 2007 • www.jn.org.

Abstract Economic theories posit reward probability as one of the factors defining rewardvalue. ... rewards. Such learning enables individuals to compute the economic value of environmental cues.