with a black square with an incongruent colored word in the middle—for instance, the word "red" written in the color green—with four smaller colored squares in the corners. One square would be colored green, one square would be red, and the two remaining squares would be other colors. Studies show that if the individual is asked to point to the color square of the written color (in this case, red) they would present a delay. Thus, incongruently-colored words significantly interfere with pointing to the appropriate square. However, some research has shown there is very little interference from incongruent color words when the objective is to match the color of the word. In popular culture The Brain Age: Train Your Brain in Minutes a Day! software program, produced by Ryūta Kawashima for the Nintendo DS portable video game system, contains an automated Stroop Test administrator module translated into game form. MythBusters used the Stroop effect test to see if males and females are cognitively impaired by having an attractive person of the opposite sex in the room. The "myth" (that is, hypothesis) was disproved. A Nova episode used the Stroop Effect to illustrate the subtle changes of the mental flexibility of Mount Everest climbers in relation to altitude. OLDTV is a popular 2017 indie game created by River Ghandour based on the Stroop test. It received overwhelmingly positive reviews, averaging at 95% as of January 2019 on Steam. and a 4.2 rating on the Appstore. In Robin Hobb's Fantasy series, The Farseer Trilogy, the protagonist Fitz Chivalry is trained by his mentor to be an assassin, using a various number of techniques to hone his observational skills, one of these being the task of reading a list of colored words as quickly as possible without making errors. In industry British automotive marque MINI released a vehicle with the turn signal indicator designed as arrows that are pointing the opposite way that the indicated turn signal is blinking. References External links Online lesson with online demonstration of the Stroop effect via PsyToolkit An online test based on the Stroop effect will show the level of flexibility of the mind Training the flexibility of the mind based on the effect of the Stroop Cognitive tests Memory tests Perception Neuropsychological tests Psychophysics Cognitive biases