How a Cold War Spy Test Boosts Fitness and Sharpness

A novel training approach could help older adults stay mentally sharp and physically fit even when fatigued, according to a new study. Researchers at the University of Extremadura in Spain investigated the effects of Brain Endurance Training (BET) on cognitive and physical performance in sedentary older women. The research, led by Jesús Díaz-García and colleagues, compared BET to standard exercise training and a control group over an 8-week period.

One example of BET is the Stroop task, a cognitive test where participants must name the color of a word, while the word itself spells out a different color (e.g., the word "red" printed in blue ink)...

During the Cold War, U.S, intelligence agencies used the Stroop task to identify potential Russian spies by presenting them with a color-word test in Russian, where a native Russian speaker would slow down when encountering incongruent color-word combinations, revealing their ability to read Russian and potentially their true identity as a spy; whereas a non-Russian speaker would not experience the same delay because the words would be meaningless to them. more