Skip to main content
. Author manuscript; available in PMC: 2022 Aug 12.
Published in final edited form as: Neuropsychopharmacology. 2022 Feb 9;47(10):1798–1807. doi: 10.1038/s41386-022-01283-8

Figure 1. Overview of the experimental session, set-up, and trial structure of the Social Reward task.

Figure 1

(A) Overview of the experimental session. T1 – T7 represent the time points at which subjective and/or physiological measures were obtained. Blue drops indicate saliva sample collection. (B) Set-up of the Social Reward task. Participants were seated in front of the monitor, holding the hand-dynamometer in the right hand. The left arm was rested on a cushion, next to a keyboard used to express judgements during the task. The toucher was seated on the other side of a curtain used to limit the participants’ field of view to the monitor. Touch was administered on the participants’ left forearm using the index and middle finger, at 3 stroking speeds corresponding to 3 levels of reward (high = 6 cm/s, low = 21 cm/s, very low = 27 cm/s). (C) Trial structure of the Social Reward task. Facial electromyography (fEMG) was recorded during the whole task and analyzed in reward anticipation (Anticipation Pre-Effort and Post-Effort) and consumption (Delivery and Relax). TMT, Trail Making Test; DSST, Digit Symbol Substitution Test; TSST, Trier Social Stress Test.