On Sun, 07 Nov 2004 06:20:01 -0500, Cub Driver
wrote:

I have been skiing at Ajax (Aspen Mountain) on a regular basis for
nearly forty years and have never noticed any effect on mental acuity
at 11,000 feet. Of course it may be that skiers are mentally inacute
to begin with.

Relying on yourself to "notice" a change has been shown to be an
exceedingly UNreliable assessment method. There have been numerous
experiments in altitude chambers demonstrating that. The subjects were not
aware of their errors in, for example, performing simple mathematical
computations, until they were returned to sea level pressure and could view
what they had written.


Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)