out-group ingroup against an outgroup ingroup against an outgroup ingroup advantage phenomenon ingroup favouritism out-group ingroup favouritism http://www.understandingprejudice.org/apa/english/page7.htm out-group ingroup against an outgroup ingroup favouritism ingroup favouritism brains are hard-wired ingroup favouritism ingroup against an outgroup out-group out-group ingroup against an outgroup ingroup favouritism out-group