Public opinion polls consistently show that a growing majority of Americans support same-sex marriage. Critics, however, raise the possibility that these polls are plagued by social desirability bias, and thereby may overstate public support for gay and lesbian rights. We test this proposition using a list experiment embedded in the 2013 Cooperative Congressional Election Study. List experiments afford respondents an anonymity that allows them to provide more truthful answer potentially sensitive survey items.
Our experiment finds no evidence that social desirability is affecting overall survey results. Indeed, our efforts provide new evidence that a national opinion majority favors same-sex marriage.
A new paper by Lax, Phillips and Stollwerk.