Teachers swear by it.
There were plenty of volunteers, but despite rigorous health, stress and intelligence tests, one in three cadets failed the training programs. G uilford expanded this successful experiment into what he called the Structure of Intellect, a model that indentifies 90 different intellectual aptitudes. They are based on the premise that we all are either figural, semantic or symbolic learners. T he type of learners we are affects the means by which we memorize things, evaluate and classify information, the way we solve problems, even the means of our creativity. An Annapolis, Md. start-up, Intellectual Development Systems, thinks it can.