Fig. 1.

Study Design: Experimenter 1 greeted the participant and thereafter, was seated behind a paravent wall. The participant sat behind this paravent wall, and put their arm—for stroking—through an opening in the wall. Experimenter 2 was seated in front of the participant to record the ratings. A camera was positioned behind experimenter 2 to record the facial expression of the participant. In the sickness condition, experimenter 1 appeared ill; while in the control condition, she appeared healthy