As our analyses above identified relations among control over pain, the reason of ‘relaxation,’ and the reason of ‘activation,’ we only tested whether the increase in perceived control over pain when music was listened to for the reason of ‘relaxation’ and ‘activation’ was mediated by the biological stress-responsive systems. However, as none of the reasons for music listening was associated either with sAA or with sCort [see Does Music Listening in Daily Life Reduce Stress in Patients with FMS (Hypothesis 3)?], conditions for mediation analyses were not met and we therefore refrained from performing mediation analyses.