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Like your desk chair? Thank a human-factors psychologist

Like your desk chair? Thank a human-factors psychologist

The human factors area of psychology developed at 30,000 feet: World War II pilots, under stress, too often pressed the wrong button, ejecting before they meant to.

Military scientists reconfigured the cockpits, placing related controls in clusters and shape-coding others. By adding circular or triangle-shaped knobs to control toggles, they helped pilots identify the controls by touch. That led to fewer mistakes, which meant fewer pilots dangling from parachutes.