Just thought I would post this link for your perusal:
http://en.wikipedia.org/wiki/Observation
Some quotes of note:
Rhizo
http://en.wikipedia.org/wiki/Observation
Some quotes of note:
Quote:Human sense impressions are subjective and qualitative making them difficult to record or compare. The idea of measurement evolved to allow recording and comparison of observations made at different times and places by different people.
Quote:Human observations are biased toward confirming the observer's conscious and unconscious expectations and view of the world; we "see what we expect to see".
Rhizo