The correlation of g with attentional and perceptual-motor ability tests Jan te Nijenhuis a, *, Henk van der Flier b a Department of Work and Organizational Psychology, University of Amsterdam, Roetersstraat 15, 1018 WB , The Netherlands b Department of Work and Organizational Psychology, Vrije Universiteit, Amsterdam, The Netherlands Received 4 June 2001; received in revised form 17 July 2001; accepted 13 August 2001 Abstract The correlation between tests of psychometric g and tests of attentional and perceptual-motor abilities was studied. These tests are generally seen as representing three different taxonomies. Test scores of 584 applicants for jobs at Dutch Railways and bus companies were used. The correlation between the g score of the cognitive test and the various parts of the attention-psychomotor battery ranged from 0.14 to 0.56 with 0.39 as an average. Structural-equations modeling using EQS resulted in a general cognitive factor and four second-order factors: Fluid/Crystallized Intelligence, Broad Visual Perception, general Atten- tional Speed and general Perceptual-Motor Ability, accounting for, respectively, 54, 15, 11, 4, and 16% of the variance. This study has shown that there is substantial overlap between these three taxonomies. The great majority of the attentional and perceptual-motor tests show substantial overlap with psychometric g. However, there is still enough unique variance connected to these tests to result in a weak Attentional Speed and a strong Perceptual-Motor Ability factor. It is most probable that inclusion of the factor scores of broad lower-order factors into a prediction formula using g results in small incremental criterion-related validity for General Attentional Speed and larger gains for General Perceptual-Motor Ability. # 2002 Elsevier Science Ltd. All rights reserved. Keywords: Ability testing; g Factor; Selective attention; Perceptual-motor tests; Hierarchical intelligence model; Confirmatory factor analysis 0191-8869/02/$ - see front matter # 2002 Elsevier Science Ltd. All rights reserved. PII: S0191-8869(01)00152-0 Personality and Individual Differences 33 (2002) 287–297 www.elsevier.com/locate/paid * Corresponding author. Tel.: +31-20-525-6746/6860; fax: +31-20-639-05-31. E-mail address: ao_tenijenhuis@macmail.psy.uva.nl (J. te Nijenhuis).