favorable impression of the partner; and (b) expecting attributional generosity from the partner. In fact, when the partner violates this exp ectancy (i.e., when he/she displays the SSB), members of close dyads respond by manifesting the SSB in turn. We discuss these and several other contingencies that are likely to keep an individual's self-enhancement tendencies in check.Individuals enhance the self in diverse and remarkable ways. They consider themselves more moral, trustworthy, kind, and physically attractive than others. They rate themselves as above-average teachers, managers, and leaders. They also believe that they are happier than others, that they are likely to be healthier and live longer than others, and that they are more likely than others to experience positive life events but less likely than others to experience negative life events. They even believe they are better drivers! Such overblown self-evaluations are well documented (Sedikides & Strube, 1997). These beliefs are maintained through several mechanisms. One mechanism is biased memorial processes, such as better memory for positive than negative self-attributes (Skowronski, Betz, Thompson, & Shannon, 1991) and for feedback pertaining to one's strengths rather than one's weak@sses (Sedikides & Green, 2000). Another mechanism is the selective reconstruction, generation, and evaluation of confirming causal theories (Kunda, 1990;Ross, 1989). A third mechanism is the idiosyncratic (i.e., favorable to the self) definition of traits and abilities (Dunning, 1993). Other mechanisms include denial (Janoff-Bulman & Timko, 1987), psychological distancing from others (Schimel, Pyszczynski, Greenberg, O 'Mahen, & Arndt, 2000), affirmation of a self-domain that is unrelated to the selfdomain under threat (Steele, 1988), downward social comparison (Wills, 1981, favorable self-presentation (Schlenker & Pontari, 2000), and selffavoring causal attributions for success and failure -an attributional pattern known as the self-serving bias (SSB).The SSB is the individual's propensity to make internal attributions for success, but external attributions for failure. Stated otherwise, the SSB refers to the individual's taking responsibility for successful task outcomes, but denying responsibility, or blaming other persons or circumstances, for failed task outcomes. For example, students will take credit for passing a difficult examination, but will attribute failing the same examination to its difficulty or the instructor's tough grading policy; business partners working on an account will claim disproportionate credit if the account is gained, but will avoid personal responsibility if the account is lost; and group members will overemphasize their individual contribution on a group project, but will blame other members for the group's inferior output. The SSB is pervasive, and is one of the most robust and easily replicable phenomena in social and personality psychology (for both narrative and quantitative reviews, see Arkin, Cooper,