00375nam a2200109Ia 4500008004100000245012700041260004900168260000900217300001000226500001300236650001600249170224s9999    xx            000 0 und d  aVagal activity is quadratically related to prosocial traits, prosocial emotions, and observer perceptions of prosociality.  bJournal of Personality and Social Psychology  c2014  a107:6  aDecember  xPsychology.