Neuro-intelligence, neuro-metrics and the next phase of brain imaging studies

Twenty years have passed since the first neuro-imaging study of intelligence. Researchers from around the world are now using a variety of imaging techniques to investigate the neural basis of intelligence, establishing the field of "neuro-intelligence". The papers in this special issue help usher in the next phase of neuro-intelligence research. Among other issues, they illustrate some of the progress made in identifying key brain areas and in elucidating the concept of brain efficiency. Samples include children, adults, and seniors. Imaging includes structural assessments and functional determinations during cognitive tests of memory and processing speed. intelligence measures address g and other factors. Some brain/intelligence relationships apparently differ for males and females. The data are intriguing. The field is maturing. The pace is quickening. As intelligence research engages 21st century neuroscience, new hypotheses and new controversies are inevitable. What a terrific time to work in this field. (C) 2009 Elsevier Inc. All rights reserved.