The Cognitive Reflection Test is a short psychological task designed to measure a person's tendency to override an initial "gut" response that is incorrect, and to engage in further reflection to find a correct answer. More succinctly, it attempts to measure how reflective participants in the study are in regards to their own mental state. It has been found to correlate highly with measures of intelligence, such as the Intelligence Quotient test. It also correlates highly with various measures of mental heuristics. The Cognitive Reflection Test was first described in 2005 by psychologist Shane Frederick.