Much of the evidence for this has come from research on a phenomenon known as flashbulb memories.

With negative flashbulb memories they are seen to have more consequences.

Research on flashbulb memories generally shares a common method.

Very few subjects had flashbulb memories for the disaster after eight months.

When looking at accuracy, the importance of the event can related to how accurate an individual's flashbulb memory is.

Younger and older adults also showed different reasons for recalling vivid flashbulb memories.

Generally the factors that influence flashbulb memories are considered to be constant across cultures.

They found that in 2003 45% of respondents surveyed met the criteria for having "consistent flashbulb memory."

This may explain why flashbulb memory typically involves traumatic events.

Therefore, the flashbulb memory becomes more accessible and vividly remembered for a long period of time.