Stability of intelligence and intellectual predictors in older persons.

The l-year temporal stability of the Wechsler Adult Intelligence Scale—Revised (WAIS-R) Full Scale IQ (FSIQ) and several predictors of intelligence, including the A. Barona and R. Chastain (see record 1987-09155-001) demographic predictor formula, the New Adult Reading Test—Revised [(NART-R) J. Blair & O. Spreen; see record 77:60], and the Intellectual Correlates Scale [(ICS) R. Schlottmann & D. Johnsen; see record 79:11341] were investigated in 51 normal older persons. Reliability of WAIS-R FSIQs and Barona, NART-R, and ICS estimates of FSIQ fell at .90, .99, .92, and .58, respectively (all ps r = .61, .73, and .48, respectively) and 2nd observations (r = .63, .73, and .41, respectively). A simple average of Barona and NART-R estimates derived from the 2nd observation correlated at .75 with WAIS-R FSIQs obtained 1 year earlier. (PsycINFO Database Record (c) 2010 APA, all rights reserved)