Intelligence theory and test progress continuum: Updated and revised

 [Double click on image to enlarge]

Intelligence theory and tests have evolved significantly over the past two decades.  This progress is reflected in the above progress continuum.  I will likely be referencing this figure in future posts.

Additional historical information is available via IQs Corner CHC Timeline project.

Interesting questions re: a potential Atkins/MR/death penalty IQ test-intelligence theory gap are noted at IQs Corner sister blog.