Structure of temperament in XI grade pupils of one of Ekaterinburg schools and in students of social rehabilitation group of technical college has been investigated with the help of V. M. Rusalov's OST method. Difference in structure of correlations of OST parameters between both groups has been found: in college students given structure looks greatly reduced. Block of stable connections in both investigated groups has been exposed. The authors conclude that social surroundings influence a degree of integrity of temperament structure and manifestation of some of its characteristics while it does not change inherited human characteristics.