LAUSR

Cognitive-achievement relations research suggests that cognitive abilities are instrumental for academic skill development. This study examined cognitive-achievement relations with the newly revised Woodcock–Johnson V (WJ V) standardization sample across the lifespan (ages 6–90+) for reading, writing, and mathematics using multi-group structural equation modeling. Integrated models of achievement were used, where cognitive abilities were predictors of all academic skills, and basic academic skills were predictors of advanced academic skills. Many results were consistent with previous research, such as general intelligence (g) having strong indirect effects on academic skills, basic academic skills were strong predictors of advanced academic skills, Auditory Processing was a strong predictor of Basic Reading Skills and Spelling, and Fluid Reasoning was a strong predictor of Math Calculation and Math Problem Solving. Some differences that have not been observed in previous research were that Auditory Processing was a stronger predictor of Basic Reading Skills and Spelling than has been found in previous research, and Visual Processing was a consistent predictor of Math Calculation across the lifespan. Results suggest that cognitive abilities measured using the WJ V are important predictors of academic skills, and cognitive ability scores may provide insights for evaluations conducted for academic difficulties.