On the molecular genetics side, several recent developments offer new opportunities for genetic psychophysiology research. There is an exponential increase in the number of identified copy number variants (CNVs), genomic variation resulting from deletions and duplications of DNA fragments. The cost of genome sequencing is rapidly dropping and this technology may soon become available at affordable prices. In addition, progress in bioinformatics will permit the selection of broader arrays of candidate genes by their relevance to the biological pathways hypothesized to play causal role in shaping individual differences in brain function and behavior.
