Electrophysiological evidence for immature processing capacity and filtering in visuospatial working memory in adolescents.
Electrophysiological evidence for immature processing capacity and filtering in visuospatial working memory in adolescents.
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DOI：
10.1371/journal.pone.0042262
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Jonkman LM
中科院分区：
文献类型：
--
作者：
Spronk M;Vogel EK;Jonkman LM
本研究探讨了青少年视空间工作记忆容量的发展及其过滤效率。为此，一组智商匹配的成年人和青少年进行了VSWM变化检测任务与操作的WM负载和分心，而性能和电生理对侧延迟活动（CDA）进行了测量。CDA是一个偏侧ERP标记的数量的目标和分心物，选择性地编码/保持在WM从一个半野的记忆显示。显著较低的VSWM容量（科万的K）被发现在青少年比成人，和青少年的WM性能（在准确性和速度方面）也遭受更多的干扰物的存在。分心相关的CDA反应部分表明，较高的分心编码/维护在WM青少年，并与分心干扰的性能指标呈正相关。这种相关性表明，在青少年的工作记忆性能的干扰更高的干扰是由于无法阻止干扰加工和维护工作记忆。在高负荷（3项）条件下，青少年的较低视觉空间WM容量（K）伴随着青少年比成人更高的CDA幅度的趋势（p<0.10），而在低负荷（1项）条件下，青少年和成人之间的CDA幅度是相当的。这些发现表明，青少年支持视觉空间WM加工的额顶叶WM-注意网络不成熟。
The present study investigated the development of visuospatial working memory (VSWM) capacity and the efficiency of filtering in VSWM in adolescence. To this end, a group of IQ-matched adults and adolescents performed a VSWM change detection task with manipulations of WM-load and distraction, while performance and electrophysiological contralateral delay activity (CDA) were measured. The CDA is a lateralized ERP marker of the number of targets and distracters that are selectively encoded/maintained in WM from one hemifield of the memory display. Significantly lower VSWM-capacity (Cowan's K) was found in adolescents than adults, and adolescents' WM performance (in terms of accuracy and speed) also suffered more from the presence of distracters. Distracter-related CDA responses were partly indicative of higher distracter encoding/maintenance in WM in adolescents and were positively correlated with performance measures of distracter interference. This correlation suggests that the higher interference of distracters on WM performance in adolescents was caused by an inability to block distracters from processing and maintenance in WM. The lower visuospatial WM-capacity (K) in adolescents in the high load (3 items) condition was accompanied by a trend (p<.10) towards higher CDA amplitudes in adolescents than adults, whereas CDA amplitudes in the low load (1 item) condition were comparable between adolescents and adults. These findings point to immaturity of frontal-parietal WM-attention networks that support visuospatial WM processing in adolescence.
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影响因子：
2.3
作者：
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通讯作者：
BARBANOJ, MJ
影响因子：
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作者：
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通讯作者：
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作者：
Gao, Zaifeng;Li, Jie;Shen, Mowei
通讯作者：
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影响因子：
2.7
作者：
Jeyakumar, SLE;Warriner, EM;Ahmad, SA
通讯作者：
Ahmad, SA
DOI：
10.1080/13803390903032529
发表时间：
2010-03
影响因子：
2.2
作者：
Hill BD;Elliott EM;Shelton JT;Pella RD;O'Jile JR;Gouvier WD
通讯作者：
Gouvier WD