Encoding location and serial order in auditory working memory: evidence for separable processes
Encoding location and serial order in auditory working memory: evidence for separable processes
复制标题
DOI：
10.1007/s10339-012-0442-3
复制
发表时间：
2012-08-01
影响因子：
1.7
通讯作者：
Postma, Albert
中科院分区：
文献类型：
--
作者：
Delogu, Franco;Nijboer, Tanja C. W.;Postma, Albert
在本研究中，我们研究了听觉工作记忆中时间和空间信息之间的交互作用。在两个实验中，参与者被呈现了来自空间不同位置的声音序列，然后被要求回忆它们的位置或它们的顺序。在实验1中，对编码过程中的注意进行了对比，将“纯”区块(即，仅限于位置或序列顺序的试验)与“混合”区块(即，不同百分比的空间和序列顺序试验)进行了对比。在实验2中，将“纯”区块与空间和序列顺序试验与需要对声音进行语义分类的第三个任务混合的区块进行了对比。两个实验的结果都表明，顺序回忆受同时特征编码的影响是线性的，而位置回忆基本上不受同时特征编码的影响。相比之下，空间回忆的整体绩效水平低于序列回忆。我们的结论是，项目的顺序和位置似乎是在听觉工作记忆中独立编码的。序列顺序更容易回忆，但受并发项目维度加工的影响较大；而项目位置较难回忆，但相对自动化，其对编码中干扰维度的抵抗力较强。
In this study, we investigated the interactions between temporal and spatial information in auditory working memory. In two experiments, participants were presented with sequences of sounds originating from different locations in space and were then asked to recall either their position or their serial order. In Experiment 1, attention during encoding was manipulated by contrasting 'pure' blocks (i.e., location-only or serial-order-only trials) to 'mixed' blocks (i.e., different percentages of spatial and serial-order trials). In Experiment 2, 'pure' blocks were contrasted to blocks in which spatial and serial-order trials were intermixed with a third task requiring a semantic categorization of sounds. Results from both experiments showed that, whereas serial-order recall is linearly affected by the simultaneous encoding of a concurrent feature, the recall of position is mostly unaffected by concurrent feature encoding. Contrastingly, overall performance level was lower for spatial recall than serial recall. We concluded that serial order and location of items appear to be independently encoded in auditory working memory. Serial order is easier to recall, but strongly affected by the processing of concurrent item dimensions, while item location is more difficult to recall, but relatively automatic, as shown by its strong resistance to interfering dimensions in encoding.