A formal and strict framework to deal with 'soft' games with misperception
of emotions by actors is provided. The concepts of credibility and complete
credibility of information are defined to examine the relations between em
otions of actors and the credibility of information about behavior of the a
ctors. The equivalence of credibility and complete credibility under inside
commonality of perceptions of emotions is verified. (C) 2000 Elsevier Scie
nce Inc. Ail rights reserved.