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在害怕跌倒的老年人中对与跌倒相关的刺激进行选择性注意加工。

Selective attentional processing to fall-relevant stimuli among older adults who fear falling.

作者信息

Brown Lesley A, White Patti, Doan Jonathan B, de Bruin Natalie

机构信息

Balance Research Laboratory, Department of Kinesiology, University of Lethbridge, Lethbridge, Alberta, Canada.

出版信息

Exp Aging Res. 2011 May;37(3):330-45. doi: 10.1080/0361073X.2011.568833.

Abstract

Fear of falling is known to affect more than half of community-dwelling older adults over 60 years of age. This fear is associated with physical and psychological effects that increase the risk of falling. The authors' theory is that attentional processing biases may exist in this population that serve to perpetuate fear of falling and subsequently increase fall risk. As a starting point in testing this proposition, the authors examined selective attentional processing bias to fall-relevant stimuli among older adults. Thirty older adult participants (M(age) = 70.8 ± 5.8), self-categorized to be Fearful of Falling (FF, n = 15) or Non-Fearful of Falling (NF, n = 15) completed a visual dot-probe paradigm to determine detection latencies to fall-threatening and general-threat stimuli. Attentional processing was defined using three index scores: attentional bias, congruency index, and incongruency index. Bias indicates capture of attention, whereas congruency and incongruency imply vigilance and disengagement difficulty, respectively. Both groups showed an attentional bias to fall-threat words but those who were fearful of falling also showed an incongruency effect for fall-threat words. These findings confirm that selective attentional processing profiles for fall-relevant stimuli differ between older adults who exhibit fear of falling and those who do not have this fear. Moreover, in accordance with current interpretations of selective attentional processing, the incongruency effect noted among fall-fearful older adults presents a possibility for a difficulty disengaging from fall-threatening stimuli.

摘要

众所周知,害怕跌倒会影响超过半数60岁以上的社区老年人。这种恐惧与增加跌倒风险的生理和心理影响相关。作者的理论是,该人群中可能存在注意力加工偏差,这种偏差会使害怕跌倒的情绪持续存在,进而增加跌倒风险。作为检验这一命题的起点,作者研究了老年人对与跌倒相关刺激的选择性注意力加工偏差。30名老年参与者(年龄均值M = 70.8 ± 5.8),自我分类为害怕跌倒组(FF,n = 15)或不害怕跌倒组(NF,n = 15),完成了一项视觉点探测范式,以确定对跌倒威胁性刺激和一般威胁性刺激的检测潜伏期。注意力加工用三个指标分数来定义:注意力偏差、一致性指数和不一致性指数。偏差表示注意力的捕获,而一致性和不一致性分别意味着警觉性和脱离困难。两组都对跌倒威胁性词语表现出注意力偏差,但害怕跌倒的人对跌倒威胁性词语也表现出不一致性效应。这些发现证实,在表现出害怕跌倒的老年人和没有这种恐惧的老年人之间,对与跌倒相关刺激的选择性注意力加工模式存在差异。此外,根据目前对选择性注意力加工的解释,在害怕跌倒的老年人中观察到的不一致性效应表明,他们有可能难以从跌倒威胁性刺激中脱离出来。

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