The Collaborative International Dictionary of English v.0.48:

Emotionalism \E*mo"tion*al*ism\, n.
   The cultivation of an emotional state of mind; tendency to
   regard things in an emotional manner.
   [1913 Webster]

WordNet (r) 3.0 (2006):

emotionalism
    n 1: emotional nature or quality [syn: emotionality,
         emotionalism] [ant: emotionlessness, unemotionality]