Szelag E, Kowalska J, Rymarczyk K, Pöppel E
Department of Neurophysiology, Nencki Institute of Experimental Biology, Warsaw, Poland.
Neurosci Lett. 1998 Nov 27;257(2):69-72. doi: 10.1016/s0304-3940(98)00809-x.
We have previously shown that temporal integration in the domain of a few seconds may be studied using a subjective accentuation paradigm. Here we report developmental effects on the limits of this temporal integration in 9-10-year-olds in comparison with 13-14-year-olds. The task was to listen to a string of identical metronome beats and mentally bind the presented beats by subjectively accentuating every second, third or nth beat. The integration interval length was defined as the number of stimuli mentally connected multiplied by the temporal interval between two successive beats. For the lowest stimulus frequency integration intervals were approximately 3 s for the older and 2.2 s for the younger children. For higher frequencies integration intervals got systematically shorter, but being always longer for the older age group. It is suggested that the prefrontal region is responsible for this developmental effect. The expansion of temporal integration correlates with cognitive development in the investigated phase of ontogenesis.
我们之前已经表明，可以使用主观强化范式来研究几秒范围内的时间整合。在此，我们报告了9至10岁儿童与13至14岁儿童相比，在这种时间整合极限方面的发育效应。任务是聆听一连串相同的节拍器节拍，并通过主观强化每第二、第三或第n个节拍，在脑海中绑定呈现的节拍。整合间隔长度定义为在脑海中连接的刺激数量乘以两个连续节拍之间的时间间隔。对于最低刺激频率，年龄较大儿童的整合间隔约为3秒，年龄较小儿童为2.2秒。对于较高频率，整合间隔系统性地缩短，但年龄较大组的整合间隔始终更长。研究表明，前额叶区域对此发育效应负责。时间整合的扩展与个体发育研究阶段的认知发展相关。
