Some conservatives have attacked the survey’s methodology, saying it is hard to define what it measures. The 18-item questionnaire asks about skipped meals and hunger pangs, but also whether people had worries about getting food. It ranks the severity of their condition by the number of answers that indicate a problem.

“Very few of these people are hungry,” said Robert Rector, an analyst at the conservative Heritage Foundation. “When they lose jobs, they constrain the kind of food they buy. That is regrettable, but it’s a far cry from a hunger crisis.”