Group-serving bias is identical to self-serving bias

Self-serving bias

A self-serving bias occurs when people attribute their successes to internal or personal factors but attribute their failures to situational factors beyond their control. The self-serving bias can be seen in the common human tendency to take credit for success but to deny responsibility for failure...

 except that it takes place between groups

Group (sociology)

In the social sciences a social group can be defined as two or more humans who interact with one another, share similar characteristics and collectively have a sense of unity...

 rather than individuals, under which group members make dispositional attributions for their group's successes and situational attributions for group failures, and vice versa for outsider groups.

For instance, the fundamental attribution error

Fundamental attribution error

In social psychology, the fundamental attribution error describes the tendency to over-value dispositional or personality-based explanations for the observed behaviors of others while under-valuing situational explanations for those behaviors...

 is a self-serving bias, while the group attribution error

Group attribution error

The group attribution error is a group-serving, attributional bias identical to the fundamental attribution error except that it occurs between different groups rather than different individuals....

 is a group-serving bias. Perhaps the most basic form of group-serving bias is ingroup bias

Ingroup bias

In-group–out-group bias, also called intergroup bias, refers to the phenomenon of in-group favoritism, a preference and affinity for one’s in-group over the out-group, or anyone viewed as outside the in-group. This can be expressed in evaluation of others, linking, allocation of resources and many...

.

See also

• Attributional bias
  Attributional bias
  In psychology, an attributional bias is a cognitive bias that affects the way we determine who or what was responsible for an event or action...
  
  
• Outgroup homogeneity bias
  Outgroup homogeneity bias
  The outgroup homogeneity effect is one's perception of out-group members as more similar to one another than are in-group members. I.e. "they are alike; we are diverse". The outgroup homogeneity effect, or "relative outgroup homogeniety" has been explicitly contrasted with the "outgroup...
  
  
• List of cognitive biases
• Group narcissism
• Group think
• Identity politics
  Identity politics
  Identity politics are political arguments that focus upon the self interest and perspectives of self-identified social interest groups and ways in which people's politics may be shaped by aspects of their identity through race, class, religion, sexual orientation or traditional dominance...