recalled did not 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.” Many experimenters question the accuracy of Flashbulb Memories, but rehearsal of the event is to blame. Errors that are rehearsed through retelling and reliving can become a part of the memory. Because Flashbulb memories happen only a single time, there are no opportunities for repeated exposure or correction. Errors that are introduced early on are more likely to remain. Many individuals see these events that create Flashbulb memories as very important and want to "never forget", which may result in overconfidence in the accuracy of the flashbulb memory. The most important thing in creating a flashbulb memory is not what occurs at the exact moment of hearing striking news, rather what occurs after hearing the news. The role of post-encoding factors such as retelling and reliving is important when trying to understand the increase in remembrance after the event has already taken place. Such research focuses on identifying reasons why flashbulb memories are more accurate than everyday memories. It has been documented that importance of an event, the consequences involved, how distinct it is, personal involvement in the event, and proximity increase the accuracy of recall of flashbulb memories. Stability over time It has been argued that flashbulb memories are not very stable over time. A study conducted on the recollection of flashbulb memories for the Challenger Space Shuttle disaster sampled two independent groups of subjects on a date close to the disaster, and another eight months later. Very few subjects had flashbulb memories for the disaster after eight months. Considering only the participants who could recall the source of the news, ongoing activity, and place, researchers reported that less than 35% had detailed memories. Another study examining participants' memories for the Challenger Space Shuttle explosion found that although participants were highly confident about their memories for the event, their memories were not very accurate three years after the event had occurred. A third study conducted on the O. J. Simpson murder case found that although participants' confidence in their memories remained strong, the accuracy of their memories declined 15 months after the event, and continued to