I personally beleive in the microsoft word model of how my memory works.
If you are searching old files on your computer, you may find an old word file that you don't recognise by the title and open it out of curiosity. You read a bit, realise what it is and close it. But before closing, word asks if you want to save changes. What changes? All I did was read it, just a few paragraphs. OK, save changes.
This is my point: when you save changes, the file gets stamped with todays date.
Files we stored in memory back in the grade school days are sometimes clean and accurate and left unchanged from the time of occurance, others (the stronger or more important or hurtful ones) have been opened and edited and altered and resaved so many times, it can be tough to get a glimpse of the "history copy" and we are not always mindful that what we remember is maybe not the way things happened.
I know I have memories that I carry that can bring up feelings of anger or fear, but if I really dig into what the memory is about I will see that the original memory was recorded by a 5 year old and it begins to lose the credibility that it carried when I was looking at the memory superficially and weighing it's value on the fact that it was last saved in it's current version by me just a few weeks ago- I trust my ability to edit a file at my currrent age, as I should.
But we can't. It is well known by police and attorneys that witnesses will lose and add details as they are given more and more opportunities to open and close the memory file. Details can be suggested by questioning that might make it into the file and get saved, and reappear as full fledged reality when the memory is opened up again.
Ask any couple about their first kiss. Even just a year into a relationship, both memebers will have memories that are starting to seperate from one another. If one of them thinks about it 2 or 3 times a week, they will have more details and beleive their version more assuredly than their partner that thinks about it when prodded once or twice on the anniversary.
The memories we think about are the ones that are most likely innacurate or at least not as reliable as the mundane memories we leave unopened and unsaved. My memories of childhood trauma have the "feel" of being accurate because I opened them and reread them just a few days ago and the memory is given the reliability rating of everything else I saved last week. My memories of a 2 week road trip at age 4 are week and unreliable because I saved most of them when I was 4 and haven't thought about them since. Maybe if I sat and talked to someone else that was there on the trip we could bring out more details, add to our files based on each others additions and from now on, remember that trip in the context of two adults collaborating and re editing a memory file that has a date stamp that carries some "reliability".
I am sure I have memories from grade school, I know them well. I am learning to be more suspicious of their validity, I am learning to remember them as the scrawlings of a 5 year old and not the polished saved version I wrote as an adult last week or month or year or even when I talked about them with an old school friend when we were 10 or 8 or 6.