Thisstudyexaminedhowadvancepreparationmodulates our ability to switch between face categorizations.The study included three switching experiments with differentpairsof facial categorizationtasks.In experiment 1, subjectsswitchedbetweengenderandoccupationcategorizations.Results showed a larger switch cost for the occupation task. Inexperiment2,participantscategorizedemotionandgendercategorizations.Resultsyieldedalargerswitchcostforthegender task. In experiment 3, subjects performed emotion andoccupation categorization task. There was a larger switch costfortheoccupationtask.Theoverallresultsofexperimentsindicated that harder task yielded a larger switch cost than theeasier task. Moreover, these switch costs can be reduced withsufficient preparation time. This study is the first investigationintoadvancepreparationeffectduringswitchingbetweentasksofsocialsignificance.Wediscusswhyasymmetriesreduce with an advance preparation during face categorizationtasks.