Pupillary Responses During a Dual Task: Effect of Noise Attenuation on the Timing of Cognitive Resource Allocation.

IF 3 2区 医学 Q1 AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY
Trends in Hearing Pub Date : 2025-01-01 Epub Date: 2025-08-14 DOI:10.1177/23312165251367630
Federica Bianchi, Sindri Jonsson, Torben Christiansen, Elaine Hoi Ning Ng
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Abstract

Although multitasking is a common everyday activity, it is often challenging. The aim of this study was to evaluate the effect of noise attenuation during an audio-visual dual task and investigate cognitive resource allocation over time via pupillometry. Twenty-six normal hearing participants performed a dual task consisting of a primary speech recognition task and a secondary visual reaction-time task, as well as a visual-only task. Four conditions were tested in the dual task: two speech levels (60- and 64-dB SPL) and two noise conditions (No Attenuation with noise at 70 dB SPL; Attenuation condition with noise attenuated by passive damping). Elevated pupillary responses for the No Attenuation condition relative to the Attenuation and visual-only conditions indicated that participants allocated additional resources on the primary task during the playback of the first part of the sentence, while reaction time to the secondary task increased significantly relative to the visual-only task. In the Attenuation condition, participants performed the secondary task with a similar reaction time relative to the visual-only task (no dual-task cost), while pupillary responses revealed allocation of resources on the primary task after completion of the secondary task. These findings reveal that the temporal dynamics of cognitive resource allocation between primary and secondary task were affected by the level of background noise in the primary task. This study demonstrates that noise attenuation, as offered for example by audio devices, frees up cognitive resources in noisy listening environments and may be beneficial to improve performance and decrease dual-task costs during multitasking.

双重任务中的瞳孔反应:噪声衰减对认知资源分配时间的影响。
虽然多任务处理是一种常见的日常活动,但它往往具有挑战性。本研究的目的是评估噪声衰减在视听双重任务中的效果,并通过瞳孔测量法研究认知资源随时间的分配。26名听力正常的参与者执行了一项双重任务,包括主要的语音识别任务和次要的视觉反应时间任务,以及一个仅限视觉的任务。在双重任务中测试了四种条件:两种语音水平(60和64 dB SPL)和两种噪声条件(70 dB SPL噪声无衰减;噪声经被动阻尼衰减后的衰减状态)。受试者在无衰减条件下的瞳孔反应明显高于衰减条件和仅视觉条件下的瞳孔反应,这表明受试者在回放句子第一部分时在主要任务上分配了额外的资源,而对次要任务的反应时间则明显高于仅视觉条件下的反应时间。在衰减条件下,受试者在完成次要任务时的反应时间与仅视觉任务相似(没有双任务成本),而瞳孔反应显示完成次要任务后资源在主要任务上的分配。研究结果表明,主次任务间认知资源分配的时间动态受到主次任务背景噪声水平的影响。这项研究表明,噪音衰减,如音频设备提供的,在嘈杂的听力环境中释放认知资源,可能有利于提高性能,减少多任务处理时的双重任务成本。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Trends in Hearing
Trends in Hearing AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGYOTORH-OTORHINOLARYNGOLOGY
CiteScore
4.50
自引率
11.10%
发文量
44
审稿时长
12 weeks
期刊介绍: Trends in Hearing is an open access journal completely dedicated to publishing original research and reviews focusing on human hearing, hearing loss, hearing aids, auditory implants, and aural rehabilitation. Under its former name, Trends in Amplification, the journal established itself as a forum for concise explorations of all areas of translational hearing research by leaders in the field. Trends in Hearing has now expanded its focus to include original research articles, with the goal of becoming the premier venue for research related to human hearing and hearing loss.
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