Forgetting is relentless.Within one hour you can forget up to 50% of something you have just learned.
There seem to be several causes for this. Check out the causes below.
PSEUDO FORGETTING :
Think about a recent exam :
Was there anything you knew you had seen but just couldn't recall? Maybe you read the material but didn't go back to review it. Or maybe you reviewed it but didn't try to say it in your own words. Or maybe you learned the formula but didn't use it enough.
Your learning was incomplete. You never really had it.
DECAY THEORY :
Remembering requires frequent review.
Interference gets you confused.
This happens a lot, especially with similar kinds of information that you haven't totally digested.