00500naa#a2200169#i#450# EN\\bibl\56986 20240428035146.7 2542-1840 20230131b2023####ek#y0engy0150####ca RU Attention Span in Preteen Boys and Girl Journal article Kemerovo Kemerovo State University 2023 5 с. Journal article local Tsigichko Elena Aleksandrovna Krivoruchko Mayya Olegovna vestnik-hss.kemsu.ru