title: Intelligence and the brain: A model-based approach.
abstract: Various biological correlates of general intelligence (g) have been reported. Despite this, however, the relationship between neurological measurements and g is not fully clear. We use structural equation modeling to model the relationship between behavioral Wechsler Adult Intelligence Scale (WAIS) estimates of g and neurological measurements (voxel-based morphometry and diffusion tensor imaging of eight regions of interest). We discuss psychometric models that explicate the relationship between g and the brain in a manner in line with the scientific study of g. Fitting the proposed models to the data, we find that a MIMIC model (for multiple indicators, multiple causes), where the contributions of different brain regions to a unidimensional g are estimated separately, provides the best fit against the data.
authors.affiliation: a Department of Psychology , University of Amsterdam , Amsterdam , The Netherlands.
authors.forename: Rogier A
authors.initials: RA
authors.lastname: Kievit
authors.forename: Hilko
authors.initials: H
authors.lastname: van Rooijen
authors.forename: Jelte M
authors.initials: JM
authors.lastname: Wicherts
authors.forename: Lourens J
authors.initials: LJ
authors.lastname: Waldorp
authors.forename: Kees-Jan
authors.initials: KJ
authors.lastname: Kan
authors.forename: H Steven
authors.initials: HS
authors.lastname: Scholte
authors.forename: Denny
authors.initials: D
authors.lastname: Borsboom