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This isn't a bible and I'm not a guru. The material on this site is my hyper-condensed description of some invisible, intangible realities. It is partial information about what aptitudes are and do to people. This is an attempt to share knowledge and understanding rather than advocate rote application of this concept in your life or at your job.

This is incomplete knowledge and understanding. Invisible intangibilities are hard to pin down and easy to misunderstand. Seeking meaning very quickly leads away from what 'has been proved' to 'what can be proved' to 'what probably is' to 'what might be' - opinion and speculation.

It like standing in a dark landscape, holding a match. Things close by are clear, but further out things dim quickly. However, these half glimpsed shapes are enormous. They seem too important to ignore, but some of my descriptions and comments can only be described as little better than educated guesses.

Accordingly, the ideas presented here are rated (by me) according to the importance of the subject and credibility of my comments, using a 1-10 scale.
IMP rates importance. 1 is unimportant and 10 is very important in some way.
CRED rates credibility. 1 is very iffy - a shot in the dark. 10 means I�m sure.

Example: High Systems Reasoners tend to have messy desks and offices. IMP-1, CRED-8.
(I consider this to be a minor point but a reliable statement.)

Please don�t quibble. I can find an exception to almost any generalization about human beings - including the ones I make. Assume my understanding that blind people will not have observation aptitudes. For clarity of communication I have chosen not to qualify things too much. These things seem to work in roughly the manner described for most people most of the time.

This work did not spring in full bloom from my mind. It is based on interpretation of generations of work by some very sharp people. Johnson O'Connor, starting in 1922, developed the conceptual model and established the statistical basis for my work on the meaning of aptitudes. He assembled a group of brilliant people who added to his efforts I wish I had known him, and them. Visit the website of the Johnson O'Connor Research Foundation, where they carry on his work.
If I have seen further, it is by standing on the shoulders of giants. (Isaac Newton )