Differentiating between Low-Achievers with a Non-Verbal Pictorial Reasoning Measure: An 18-Month Follow-Up

Predictive power of a non-verbal pictorial reasoning measure to differentiate between low-achievers in quantitative, vocabulary, and reading comprehension skills was investigated in 3 analyses in which high school groups equivalent in terms of (low) achievement scores and different (high or low) in terms of reasoning scores were followed up 18 mo. later, using an external criterion of achievement test score. For these Ss, the non-verbal reasoning measure differentiated between the low-achievers in quantitative and vocabulary skills, but did nor differentiate between the low-achievers in reading comprehension skill.