Richard J. Haier is an American psychologist who has researched a neural basis for human intelligence, psychometrics, general intelligence, and sex and intelligence.

Haier is currently a Professor Emeritus in the Pediatric Neurology Division of the School of Medicine at University of California, Irvine. He has a Ph.D. from Johns Hopkins University. He is also the editor-in-chief of the journal Intelligence since 2016.^[1]

In 1994, he was one of 52 signatories on "Mainstream Science on Intelligence", an editorial written by the American psychologist Linda Gottfredson and published in the Wall Street Journal, which summarized findings from intelligence research, especially as they related to issues raised in The Bell Curve.^[2]

He has worked with Rex Jung on the parieto-frontal integration theory (P-FIT) which uses neuro-imaging to examine the neuroscience of intelligence.^{[3][citation needed]}