Misremembering a common object: when left is not right

Three experiments were carried out to investigate people's memory for British coins. Two principal issues were studied. First, it has previously been shown that memory for U.S. pennies and other coins is surprisingly imperfect. How do other countries compare? It turned out that recall of the design of British pennies was, if anything, worse even than that of U.S. pennies. The situation was no better for a larger coin with an unusual shape. It is suggested that individual features are poorly remembered if they have low levels of meaningfulness, redundancy, identifiability, and discriminativeness. Second, in addition to this generally weak level of remembering, an instance of systematic misremembering was consistently observed. The Queen's portrait always faces to the right on British coins. Yet in all three experiments, the proportion of participants who recalled that the portrait faces to the right was so low (overall, 19%) that it was significantly less than even the 50% baseline to be expected from people in a state of complete ignorance. It follows that the participants were not in a state of complete ignorance. Rather, they relied upon extraneous knowledge of either a general or a specific nature (bias and schema hypotheses, respectively), whose importation into this domain was in fact invalid. The resulting belief that coin portraits face left was not right.