Beanster,
a definiton from the web: Psychophysics is commonly defined as the quantitative branch of the study of perception, examining the relations between observed stimuli and responses and the reasons for those relations.
That is, you vary an objective value of a stimulus (intensity, size, distance, colour,...) and ask the observer to 'tell' you about the subjective side (perceived intensity; which of two stimuli seems larger; match two stimuli to have subjectively equal colour;...).

kat,
yes I can see the relevance of that link to a Christian fundamentalist to the discussion here. He says:
In conclusion, then, our Christianity does come to bear in our thought processes. It forms a central part of our worldview and is an organizing principle of experience. ... Indeed it is a task of the utmost importance for the intellectual Christian to develop and to show the consistency of a Christian worldview... which reflects the timeless, absolute truths of the Gospel in our unique culture and generation.
Good example how faith comes first and determines what is then admissed as truth.

Helen,
I stated that a certain claim (on cloud busting) could be tested whether it was real (based on reality) or imaginary. It was a claim about an observable relationship which is definitely within the realm of science. You cited my statement and went on that nobody can "definitely state what reality is". For me that was nothing but using words as a smokescreen in order to obfuscate a simple issue.

Wolfgang