Mixed Race Studies

Genetic ancestry test results shape race self-identification, Stanford researchers find

Stanford News
Stanford University, Stanford, California
2021-05-17

Sandra Feder, Public Relations Communications Officer

A new Stanford study examines how genetic information learned from ancestry tests changes how people self-identify their race on surveys and the implications this may have for how racial discrimination is monitored. (Image credit: Getty Images)

People who have taken a genetic ancestry test are more likely to report multiple races when self-identifying on surveys, according to Stanford sociologists.

A genetic ancestry test (GAT) can not only unearth deep family secrets, it also can change how people self-identify their race on surveys. A new study by Stanford sociologists delves into how such changes could affect data that demographers use to measure population shifts and monitor racial inequalities.

Aliya Saperstein, associate professor of sociology, and sociology doctoral candidate Sasha Shen Johfre explored how people who have taken a GAT use their newfound ancestry information to answer questions about race on demographic surveys. In a paper recently published online in the journal Demography, the researchers found that GAT takers were significantly overrepresented among people who self-identified with multiple races.

“Theoretically, race and ancestry are distinct constructs,” said lead author Johfre. “Race is more than just family history; it is a reflection of how society interprets a person’s ancestry.”…

Read the entire article here.

Measuring Race and Ancestry in the Age of Genetic Testing

Demography
2021-04-12
26 pages
DOI: 10.1215/00703370-9142013

Sasha Shen Johfre, Ph.D. Candidate
Department of Sociology
Stanford University, Stanford, California

Aliya Saperstein, Associate Professor of Sociology; Benjamin Scott Crocker Professor in Human Biology
Stanford University, Stanford, California

Jill A. Hollenbach, Associate Professor of Neurology
Weill Institute for Neurosciences
University of California, San Francisco, California

Will the rise of genetic ancestry tests (GATs) change how Americans respond to questions about race and ancestry on censuses and surveys? To provide an answer, we draw on a unique study of more than 100,000 U.S. adults that inquired about respondents’ race, ancestry, and genealogical knowledge. We find that people in our sample who have taken a GAT, compared with those who have not, are more likely to self-identify as multiracial and are particularly likely to select three or more races. This difference in multiple-race reporting stems from three factors: (1) people who identify as multiracial are more likely to take GATs; (2) GAT takers are more likely to report multiple regions of ancestral origin; and (3) GAT takers more frequently translate reported ancestral diversity into multiracial self-identification. Our results imply that Americans will select three or more races at higher rates in future demographic data collection, with marked increases in multiple-race reporting among middle-aged adults. We also present experimental evidence that asking questions about ancestry before racial identification moderates some of these GAT-linked reporting differences. Demographers should consider how the meaning of U.S. race data may be changing as more Americans are exposed to information from GATs.

Read the entire article here.