This study explores imitation of the acoustic realization of Spanish stress in disyllabic words produced in isolation, which is cued by three correlates: F0, duration, and intensity. Forty-eight native speakers of Mexican Spanish shadowed one of four model talkers of the same dialect. Differentials for each acoustic correlate of stress were generated by calculating the difference between the values of the first and second vowels for each of F0, duration, and intensity, for all recordings. Next, 87 Spanish speakers participated as listeners in a holistic perceptual assessment (4IAX task) of the shadowers’ productions. Bayesian mixed-effects modelling was performed for both the acoustic and perceptual data. The results showed that the shadowers imitated the model talkers on all three differentials, but made the greatest shifts on the F0 differential, followed by duration, shifting the least on intensity. Analysis of the perceptual pattern showed that the listeners perceived imitation and that the shadowers’ imitation on all three differentials contributed to the perceptual pattern. Lastly, the extent to which the listeners relied on imitation of the differentials aligned roughly, but not exactly, with how much the shadowers had converged on each differential, with listeners using imitation on duration the most, followed by F0, followed by intensity.

本研究探讨了在孤立产生的双音节词中模仿西班牙重音的声学实现，这由三个相关因素提示：F0、持续时间和强度。48 名以墨西哥西班牙语为母语的人追随了使用同一方言的四名模范谈话者之一。通过计算每个 F0、持续时间和强度的第一个和第二个元音的值之间的差异，为所有记录生成每个声学相关性的差异。接下来，87 名讲西班牙语的人作为听众参与了对影子制作者的整体感知评估（4IAX 任务）。对声学和感知数据都进行了贝叶斯混合效应建模。结果表明，阴影者在所有三个差分上都模仿了模型说话者，但在 F0 差分上的变化最大，其次是持续时间，强度变化最小。对感知模式的分析表明，听者感知到了模仿，而阴影者对所有三个差异的模仿都对感知模式做出了贡献。最后，听众依赖模仿差异的程度大致与阴影者在每个差异上的收敛程度一致，但不完全一致，听众在持续时间上使用模仿最多，其次是 F0，其次是强度。