The unsettling part comes next; Freedman and Fraser wanted to know how apparently unrelated the consistency prompt could be. So, with a third group of homeowners, they had a “volunteer” for an ostensibly unrelated non-profit ask the homeowners to sign a petition to “keep America beautiful”. The petition was innocuous enough that nearly everyone signed it. And two weeks later, when the original guy came by with the big, ugly signs, nearly half of the homeowners said yes—a significant boost above the 19% baseline rate. Notice that the “keep America beautiful” petition that prompted these effects was: (a) a tiny and un-memorable choice; (b) on an apparently unrelated issue (“keeping America beautiful” vs. “driving safely”); and (c) two weeks before the second “volunteer”’s sign request (so we are observing medium-term attitude change from a single, brief interaction).
I’m strongly tempted to defy the data.