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在利用注意力改善视觉工作记忆的能力方面不存在年龄缺陷。

No age deficits in the ability to use attention to improve visual working memory.

作者信息

Souza Alessandra S

机构信息

University of Zurich.

出版信息

Psychol Aging. 2016 Aug;31(5):456-70. doi: 10.1037/pag0000107. Epub 2016 Jun 2.

Abstract

Maintenance of information in mind to the moment-to-moment cognition is accomplished by working memory (WM). WM capacity is reduced in old age, but the nature of this decline is yet not clear. The current study examined the hypothesis that the decline in visual WM performance with age is related to a reduced ability to use attention to control the contents of WM. Young (M = 26 years) and old (M = 71 years) adults performed a color reproduction task in which the precise color of a set of dots had to be maintained in mind over a brief interval and later reproduced using a continuous color wheel. Attention was manipulated by presenting a spatial cue before the onset of the memory array (a precue) or during the maintenance phase (retro-cue). The cue indicated with 100% certainty the item to be tested at the end of the trial. A precue allows the selective encoding of only the relevant item to WM, whereas a retro-cue allows WM contents to be updated by refreshing the relevant (cued) item and removing nonrelevant (noncued) items. Aging was associated with a lower capacity in the baseline (no-cue) condition. Precues and (to a smaller extent) retro-cues improved WM performance (in terms of probability of recall and memory precision). Critically, the benefits of cueing were of similar magnitude in young and older adults showing that the ability to use attention to selectively encode and update the contents of WM is preserved with aging. (PsycINFO Database Record

摘要

工作记忆(WM)可将信息维持在脑海中以实现即时认知。老年人的工作记忆容量会下降,但其下降的本质尚不清楚。当前研究检验了这样一个假设,即随着年龄增长视觉工作记忆表现的下降与利用注意力控制工作记忆内容的能力降低有关。年轻成年人(M = 26岁)和年长成年人(M = 71岁)完成了一项颜色再现任务,在该任务中,一组点的精确颜色必须在短时间内记在脑海中,随后使用连续色轮进行再现。通过在记忆阵列开始前(预线索)或维持阶段(回溯线索)呈现空间线索来操控注意力。该线索以100%的确定性表明试验结束时要测试的项目。预线索仅允许将相关项目选择性编码到工作记忆中,而回溯线索则通过刷新相关(被提示的)项目并去除不相关(未被提示的)项目来更新工作记忆内容。在基线(无线索)条件下,衰老与较低的容量相关。预线索以及(在较小程度上)回溯线索改善了工作记忆表现(就回忆概率和记忆精度而言)。关键的是,线索提示的益处在年轻和年长成年人中幅度相似,这表明利用注意力选择性编码和更新工作记忆内容的能力在衰老过程中得以保留。(PsycINFO数据库记录

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