Fig. 1
From: Rejecting unfairness enhances the implicit sense of agency in the human brain
Trial procedure of experiments 1 and 2. Participants were presented with fair and unfair offers proposed by computers or humans respectively (in experiment 2, the proposers only included humans), and they can either choose to accept or reject the offers by pressing the keys. After their responses, a sound would occur. The time interval between their response and the sound varied randomly (200, 500, or 800 ms). At the end of each trial, participants estimated the time interval between their action and the auditory stimulus on a visual scale.
