The present study was to investigate the low-status groups ' in/out-group favoritism. The SC-IAT was developed with software E-Prime2.0 to test 42 professional masters' implicit favoritism of in /out-group, also explicit favoritism was measured by semantic differential scales. Results shown that the explicit and implicit measures showed that the professional masters hold the in-group favoritism, also the out-group favoritism was significantly higher than in-groups'; There was no correlation between explicit and implicit measure of in/out-gro...