In a study conducted on September 12, 2001, 54 Duke students were tested for their memory of hearing the terrorist attack and their recall of a recent everyday event. Then, they were randomly assigned to be tested again either 7,42 or 224 days after the event. The results showed that mean number of consistent inconsistent details recalled did not significantly differ for flashbulb memories and everyday memories, in both cases declining over time. However, ratings of vividness, recollection and belief in accuracy of memory declined only for everyday memories. These findings further support the claims that "flashbulb memories are not special in their accuracy but only in their perceived accuracy.”