Who hit the ball out? An egocentric temporal order bias

To investigate whether there is a systematic bias to perceive one’s own action events as having occurred before external events in real-world temporal order judgments, we had Arizona State University (ASU) student participants (ages 18 to 23) play a timing game. In a replication of our first experiment, we again found a significant main effect bias for participants to believe that their touch occurred before a simultaneous mechanical tactile stimuli, with an ETO bias indicating a 75% chance of reporting “I touched first” at a 0-ms offset (t = 23.47, P < 0.001, d = 4.69) and a corresponding PSS of 47.8 ms (t = 6.56, P < 0.001, d = 1.31) (Fig. 3B). As in the previous experiments, we found the same bias even when participants performed this cross-sensory integration of their own tactile action event and an external auditory stimuli (ETO bias: 67% chance of responding “I touched first” at 0-ms offset, t = 20.22, P < 0.001, d = 4.56; PSS: 45.3 ms, t = 3.77, P < 0.001, d = 0.75) (Fig. 3C).

Source: advances.sciencemag.org