We often use metaphors to describe human memory and a common comparison for memory is the computer hard drive. While we can think about the similarities in how information is encoded, stored and retrieved with computer and brain, the analogy can also be misleading. 
We expect the information we store on our hard drive to be just as we left it when retrieving it from storage, but our own memories are not exact copies of the original experience. In fact they often change and as old information interacts with new information, we actively reconstruct our memories each time we recall them.
Much of what happens in the court of law relies on witnesses recalling past events. In your activity today you will be discussing how this can go horribly wrong. We owe much of our understanding of the limits of eyewitness testimony to the work of Elizabeth Loftus. Here is an interesting Scientific American article summarizing her work.
And if you still are not convinced, check out this video showing how easy it is to misremember the details of a crime.
Some of you will have difficulty understanding exactly how Paul Ingram came to believe that he committed the crimes his daughter accused him of. Some recent brain imaging research provides a clue.
Researcher Show How False Memories Are Formed _ Northwestern University Newscenter.pdf
What role then does attention play in memory formation and what are some of the conditions necessary for false memories to occur?
Finally, as students, at one time or another you likely wondered how much easier school would be for someone with a photographic memory. You might change your mind after reading about a woman who can't forget anything.
attention is really the main thing in the memory because it if you don't listen and encode it you will never remember what you just heard. Also, always it is hard to pay attention duo to interference and distractions. Also it can create false memory because you might see something similar to what you just heard or seen and you are not sure about.