Kevin Langdon is one of the five founders of Triple Nine Society and author of the Langdon Adult Intelligence Test (LAIT), widely accepted for high-range IQ testing until it was compromised.

The "Higher-IQ Societies" and High-Range Testing: Fundamental Concepts and History

This talk will focus on high-range IQ testing and the special problems that arise in the far right tail of the bell curve, and on the high-IQ societies with cutoffs above the 99.9th percentile, their difficulties in selecting members, and their history.

Kevin's web site: http://www.polymath-systems.com/

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