APA Dictionary of Psychology

a visual test in which the participant is asked to identify from among a group of six similar figures the one that matches a given sample. Items are scored for response time to first selection, number of correct first-choice selections, and number of errors. The test is used to measure conceptual tempo, that is, the relative speed with which an individual makes decisions on complex tasks (see reflection–impulsivity). [originally published in 1965 by Jerome Kagan]