A study published on Monday in the Proceedings of the National Academy of Sciences questions that explanation, the latest to suggest that Trump voters weren't driven by anger over the past, but rather fear of what may come. White, Christian and male voters, the study suggests, turned to Mr. Trump because they felt their status was at risk.

"It's much more of a symbolic threat that people feel,'' said Diana C. Mutz, the author of the study and a political science and communications professor at the University of Pennsylvania, where she directs the Institute for the Study of Citizens and Politics. "It's not a threat to their own economic well-being; it's a threat to their group's dominance in our country over all."

The study is not the first to cast doubt on the prevailing economic anxiety theory. Last year, a Public Religion Research Institute survey of more than 3,000 people also found that Mr. Trump's appeal could better be explained by a fear of cultural displacement.

In her study, Dr. Mutz sought to answer two questions: Is there evidence to support the economic anxiety argument, and did the fear of losing social dominance drive some voters to Mr. Trump? To find answers, she analyzed survey data from a nationally representative group of about 1,200 voters polled in 2012 and 2016.