44 adolescents (20 male, 24 female) were studied on the fortitude against negative stimulation in experimental frustration situation. There os a correlation of fortitude against capitulation reaction and test results (16RG, TAT in Heckhausen's modification, Rozenzweig). Risk factors of search refusal characteristic for both adults and adolescents and for adolescents only were marked out. Different influence of the same personal characteristics in adults and in adolescents on the fortitude against unavoidable negative stimulation was analysed as well as an action refusal not being capitulation reaction