What does the cognitive reflection test really measure: A process dissociation investigation.
The cognitive reflection test (CRT) is a series of brain-teaser type questions believed to measure intuitive versus reflective thinking. However, those measures are confounded by the single-continuum scoring method whereby a decrease in reflective thinking also results in a simultaneous increase in intuitive thinking, making interpretation of the scores difficult. This confound also precludes testing of the relation between the two processes—whether intuition and reflection operate in serial or in parallel. The present studies directly address these limitations using process dissociation (PD) to quantify and manipulate each process independently. If the CRT measures both intuition and reflection then using PD to isolate each score should provide unique information about each process and allow for testing of models describing the relation between the two processes. However, results of four studies (two preregistered) call in to question whether the CRT actually measures intuition (studies 1-3) and provides some limited evidence for a serial processing model of cognition (studies 3-4). Moving forward, it is recommended that researchers 1) consider alternative measures of cognitive reflection, 2) are cognizant of the phrasing used when describing intuitions as inferred from the CRT, and 3) move towards various conceptual measures of intuition.