Using The Schedule of Racist Events (SRE), an 18-item self-report inventory which assesses the frequency of racist discrimination, Hope Landrine and Elizabeth A. Klonoff found that racist discrimination is rampant in the lives of African Americans and as a result, it is strongly related to psychiatric symptoms. A study on racist events in the lives of African American women found that lifetime experiences of racism were positively related to lifetime histories of both physical disease and the frequency of recent common colds. These relationships were largely unaccounted for by other variables. Demographic variables such as income and educational inequality were not related to experiences of racism. The results suggest that racism can be detrimental to African Americans' well-being. The physiological stress caused by racism has been documented in studies by Claude Steele, Joshua Aronson, and Steven Spencer on what they term "stereotype threat." Quite similarly, another example of the psychosocial consequences of discrimination have been observed in a study sampling Mexican-origin participants in Fresno, California. It was found that perceived discrimination is correlated with depressive symptoms, especially for those less acculturated in the United States, like Mexican immigrants and migrants.