“…Numerous studies have yielded at least one spatial factor. Three spatial factors have strong support-Visualization, Spatial Orientation, and Speeded Rotation-and several other factors have some support (Ekstrom et al, 1979;Guilford & Lacey, 1947;Hoffman, Guilford, Hoepfner, & Doherty, 1968;Lohman, 1979Lohman, , 1988McGee, 1979;Michael, Guilford, Fruchter, & Zimmerman, 1957).' 2 Kylonen and Christal (1990) used the ASVAB AR and MK subtests as reasoning measures.…”