Reliability and validity of a non-verbal measure of the speed and efficiency of long-term memory retrieval

This study examined the reliability and validity of a new elementary cognitive task (ECT) based on the Posner paradigm. This task measures the speed and efficiency of long-term memory retrieval using non-verbal stimuli. Results indicated that the non-verbal Posner task has acceptable test-retest reliability. Parameters of reaction time (RT) were found to correlate substantially (after correction for range restriction) with verbal IQ, but not with performance IQ.