Fast to forgive, slow to retaliate: intuitive responses in the ultimatum game depend on the degree of unfairness.
Level 2 - randomized trial
Controlled behavioral laboratory experiment with manipulated conditions (graded by design analogy to non-clinical experimental research)
PubMed 24820479 · doi:10.1371/journal.pone.0096344
What was done
Researchers tested intuitive versus reflective decision-making using a series of one-shot ultimatum games. They manipulated the degree of offer unfairness across five split ratios (50:50, 60:40, 70:30, 80:20, and 90:10) and enforced varying pre-response time delays (1s, 2s, 8s, and 15s). Decision response times following the enforced delays were also measured to assess whether intuitive responses are moderated by the severity of unfairness.
What was found
The abstract reports directional findings without exact numerical statistics, percentages, or participant numbers. When facing mildly unfair offers (60:40), participants were fast to accept (cooperate), but with longer enforced delays, they rejected these mildly unfair offers. Conversely, for severely unfair offers (90:10), the intuitive and fast response was consistently to reject.
Why it matters
This study refines the social heuristic hypothesis by demonstrating that intuitive cooperation is context-dependent: intuitive prosociality applies under mild unfairness, whereas severe unfairness triggers immediate intuitive retaliation.
Limits
The abstract does not disclose the sample size, participant demographics, statistical test values, confidence intervals, or exact effect sizes. As an artificial laboratory game setting involving anonymous one-shot stakes, findings may not fully generalize to complex real-world social negotiations.
Cited by
- context In the ultimatum game, responders offered an 80/20 split are indifferent and reject the offer roughly 50% of the time.