Figure 4
Dictator Behavior for Pain as a Function of Default Allocations.
For each plot a single data point represents a mean choice probability across 47 participants; error bars are 95% confidence intervals around the mean, generated by re-sampling the data 100,000 times with replacement. (a) The probability, in the Take frame, that dictators chose to take 6 shocks from the receiver’s allocation (decreasing the resulting offer by 6 shocks), as opposed to leaving the allocation unchanged, is plotted as a function of the initial allocation of shocks to the receiver (the default offer). Dictators were increasingly likely to take shocks from the receiver as the initial allocation to the receiver increased, consistent with an increasing marginal cost to having fewer shocks than the receiver. (b) The probability, in the Give frame, that dictators chose to give 6 of their allocated shocks to the receiver (increasing the resulting offer by 6 shocks) is plotted as a function of the initial allocation of shocks to the receiver (the default offer). Dictators were increasingly likely to give shocks to the receiver as the initial allocation to the receiver decreased, consistent with there being an increasing marginal cost to having more shocks than the receiver. Similarly, in the Give or Take frame, the probability that dictators chose to take 6 shocks from the receiver’s allocation increased as the initial allocation to the receiver increased (c) and the probability that dictators chose to give 6 of their shocks to the receiver decreased as the initial allocation to the receiver increased (d).
