title: Speculation to Inform and Speculation to Explore: Response to Craig et al. (2009) and Turkheimer & Halpern (2009).
abstract: Scientific speculation is exploration, but it can also be used to inform, particularly across disciplines. This article, a follow-up to an empirical article on the same subject, was written with both of these purposes in mind. Many researchers are interested in uncovering the genetic mechanisms underlying general intelligence, so no doubt the roles of genes on the X chromosome will one day be understood. Psychologists can contribute best to these developments by being informed about the genetic issues involved.
authors.affiliation: University of Edinburgh, United Kingdom University of Minnesota-Twin Cities, and wendy.johnson@ed.ac.uk.
authors.forename: Wendy
authors.initials: W
authors.lastname: Johnson
authors.affiliation: Public Health Sciences, University of Edinburgh Medical School, United Kingdom.
authors.forename: Andrew
authors.initials: A
authors.lastname: Carothers
authors.affiliation: University of Edinburgh, United Kingdom.
authors.forename: Ian J
authors.initials: IJ
authors.lastname: Deary