Many older adults can vividly recall where they were and what they were doing the day that John F. Kennedy was assassinated, although they cannot remember what they were doing the day before he was assassinated. This is an example of .

A flashbulb memory.

Explanation:

As the example suggests, a flashbulb memory is a highly vivid, highly detailed memory of a moment. Usually, circumstances are unfrequent and surprising for this type of memory to occur, altough it's not a complete memory.  This, then, would explain why many adults can recall where they were and what they were doing the day that Kennedy was assassinated but not an "ordinary", routinary day; given that it was a one in a lifetime experience.

she recieved a treatment not thought to be specifically effective in treating her disorder.