I've just listened to a TED talk from Daniel Kahneman that has huge relevance for anyone involved in Knowledge Transfer or Knowledge Elicitation work. We know that an individual's recall and their actual experience may be quite different. This excellent talk shows just how different they can be. Kahneman is credited with inventing the concept of 'behavioural economics'.
By the way, if you are interested in knowing how much (or little) annual income is required to make you 'experientially happy', listen to the Q&A at the end.
"Using examples from vacations to colonoscopies, Nobel laureate and founder of behavioral economics Daniel Kahneman reveals how our "experiencing selves" and our "remembering selves" perceive happiness differently. This new insight has profound implications for economics, public policy -- and our own self-awareness".