Ravenʹs Progressive Matrices and inspection time: P200 slope correlates

The N1P2 complex is a component of cortical event related-potentials. It has been linked to intelligence as well as early processing and attention. This study examined a new measure—the slope of the N1P2 complex—during an inspection time task. The 49 participants also completed the Ravenʹs Standard Progressive Matrices as an intelligence index. P200 slope at the frontal and temporo-occipital, but not at temporal or occipital, recording sites was significantly correlated with both inspection time and Ravenʹs performance. This study supports earlier N1P2 links with intelligence, and refines the ERP measure and eliciting task.