TY - JOUR AU - Koo, Miseung AU - Suh, Myung-Whan AU - Lee, Jun Ho AU - Oh, Seung-Ha AU - Park, Moo Kyun PY - 2020/04/30 Y2 - 2024/03/28 TI - Task repetition influence on pupil response during encoding of auditory information in normal-hearing adults JF - Proceedings of the International Symposium on Auditory and Audiological Research JA - Proc. ISAAR VL - 7 IS - 0 SE - 2019/5. Other topics in auditory and audiological research DO - UR - https://proceedings.isaar.eu/index.php/isaarproc/article/view/2019-47 SP - 405-412 AB - <div class="page" title="Page 1"><div class="layoutArea"><div class="column"><p>Although numerous behavioural measures to estimate listening effort have been developed in recent years using free recall or dual-task paradigms, relatively little is known about physiological measures, such as pupil dilation, in response to cognitively demanding tasks. This study used a repeated-measure experimental design and aimed to investigate the cognitive resource allocation process of spoken words in an immediate free recall paradigm. Here, ten adults with normal hearing (NH) attended 2 days of trials with 14 trials per day. The listeners heard four-speaker babble noise along with seven sentences and then tried to remember the first words of all seven sentences. Recall performance on the first day only showed a significant serial position effect (p &lt; 0.05). With increasing memory load imposed by the subsequent recall task, baseline pupil size significantly enlarged (p &lt; 0.01), and the PPDs significantly decreased (p &lt; 0.01) during the encoding process, implying that a gradual increase in resources allocated to memory capacity corresponded to a decline in resources allocated to listening. Real-time allocation of cognitive resources during the encoding of spoken words can be monitored independently by the analysis of pupil dilation averaged over multiple trials.</p></div></div></div> ER -