What drives self-affirmation effects? On the importance of differentiating value affirmation and attribute affirmation.

In a series of studies, it is demonstrated that different types of self-affirmation procedures produce different effects. Affirming personally important values (value affirmation) increases self-clarity but not self-esteem. Affirming positive qualities of the self (attribute affirmation) increases self-esteem but not self-clarity (Study 1). As a consequence, attribute affirmation (which increases self-esteem) is more effective than value affirmation as a buffer against self-depreciating social comparison information. Attribute-affirmed participants more readily accept the self-evaluative consequences of threatening upward social comparisons than do value-affirmed participants (Study 2). However, value affirmation (which increases self-clarity) is a more effective buffer against dissonance threats. Value-affirmed participants showed less attitude change after writing a counterattitudinal essay than attribute-affirmed participants (Study 3).