Median estimated parameters for guilt, envy, expected guilt, and expected envy, as well as two unique λ values estimated for each group as a whole (guilt and envy analyses, respectively). Superscripts are one-tailed t test p values between the VMPFC and the row groups, and numbers in parentheses are standard errors; note that in both cases, these are based on the means rather than the reported medians. See supplemental Table 2 (available at www.jneurosci.org as supplemental material) for precision estimates for the guilt estimation procedure.