Jia Lexin, Zhao Ruiying, Zhang Qingfang
Department of Psychology, Renmin University of China, Beijing, China.
Front Hum Neurosci. 2024 Feb 13;18:1330746. doi: 10.3389/fnhum.2024.1330746. eCollection 2024.
This study investigated the influence of induced mood on the phonological encoding involved in Chinese spoken word production with a picture-word inference task while concurrently recorded electrophysiological signals. In the experiment, young and older participants watched videos for inducing positive, negative, or neutral mood, and then they were instructed to name target picture while ignoring phonologically related or unrelated distractor words. A phonological facilitation effect was observed in young adults but not in older adults, suggesting an age-related decline of phonological encoding. Both groups showed an inhibition effect in negative mood but not in positive mood, suggesting that speakers have different processing styles in different moods. ERP data revealed a phonological effect around the time window of 250-350 ms in both groups. Meanwhile, young adults showed a phonological effect around 350-450 ms in negative mood and positive mood which may reflect self-monitoring in speech production. We suggest that the former effect may reflect phonological encoding while the latter reflects self-monitoring of internal syllables or phonemes. Furthermore, induced moods influence the phonological effect in older and young adults differently. Behavioral and ERP results provide consistent evidence for the aging decline of phonological encoding in spoken word production.
本研究通过图片-单词推理任务，同时记录电生理信号，调查了诱导情绪对汉语口语单词产生中语音编码的影响。在实验中，年轻和年长的参与者观看用于诱导积极、消极或中性情绪的视频，然后他们被要求说出目标图片的名称，同时忽略语音相关或不相关的干扰词。在年轻人中观察到了语音促进效应，而在老年人中未观察到，这表明语音编码存在与年龄相关的衰退。两组在消极情绪下均表现出抑制效应，而在积极情绪下则未表现出抑制效应，这表明说话者在不同情绪下有不同的加工方式。ERP数据显示，两组在250-350毫秒的时间窗口左右均出现了语音效应。同时，年轻人在消极情绪和积极情绪下在350-450毫秒左右均出现了语音效应，这可能反映了言语产生中的自我监控。我们认为，前一种效应可能反映了语音编码，而后一种效应反映了对内部音节或音素的自我监控。此外，诱导情绪对老年人和年轻人的语音效应影响不同。行为和ERP结果为口语单词产生中语音编码的衰老衰退提供了一致的证据。
