Yoshrlik davri, yoshlar, eshitish-korish periferik va kinestetik sergirlikning o'zgarishi, V. Shevchukning voyaga yetgan odamlarda ijodiy faoliyatning boshlanishnuqrtasi tadqiqi, laboratoriya hodimning funktsional darajaning oshishi, Y.N. Kulyutkinning taqdiqoti natijasiga kora xotira va tafakkur foizi