Fig 3. Nociceptive temporal order judgments (TOJs) in Experiment 2.

The figures illustrate the fitted curves from cumulative data from 17 participants. Trials were either associated with bilateral cues (left side of the figure), or with an unilateral cue (right side of the figure), and with an uncrossed (blue solid line) or a crossed (red dashed line) posture. Data are plotted as the mean proportion of left hand first responses (on the Y-axis; left side of figure, bilateral cues) or cued hand first responses (on the Y-axis; right side of figure, unilateral cues), as a function of the stimulus onset asynchronies (SOA) (on the X-axis). On the X-axis, for the bilateral cue conditions, the negative values of the SOAs indicate that the left hand was stimulated first, and the positive values indicate that the right hand was stimulated first. In the unilateral cue condition, negative values indicate that the cued hand was stimulated first, while positive values indicate that the uncued hand was stimulated first. The vertical dashed lines coincide with the PSS values. As in Experiment 1, the curves in the unilateral cue conditions were shifted toward the uncued side both for the uncrossed and the crossed posture. This indicates that the nociceptive stimulus on the uncued hand had to be presented several milliseconds before the stimulus on the cued hand to have an equal chance to be perceived first. This effect was even stronger for the crossed posture.