STABILITY OF INTELLIGENCE AND INTELLECTUAL PREDICTORS IN OLDER PERSONS

The 1-year temporal stability of the Wechsler Adult intelligence Scale -Revised (WAIS-R) Full Scale IQ (FSIQ) and several predictors of intel ligence, including the A. Barona and R. Chastain (1986) demographic pr edictor formula, the New Adult Reading Test-Revised (NART-R: J. Blair & O. Spreen, 1989), and the Intellectual Correlates Scale(ICS: R. Schl ottmann & D. Johnsen, 1991) were investigated in 51 normal older perso ns. Reliability of WAIS-R FSIQs and Barona, NART-R. and ICS estimates of FSIQ fell at .90, .99, .92, and .58, respectively (all ps < .05). E stimates of FSIQ generated by the Barona, NART-R, and ICS correlated s ignificantly with concurrent FSIQ obtained on the 1st (r = .61, .73, a nd .48, respectively) and 2nd observations (r = .63, .73, and .41, res pectively). A simple average of Barona and NART-R estimates derived Fr om the 2nd observation correlated at .75 with WAIS-R FSIQs obtained 1 year earlier.