Language and Speech, Ahead of Print.
Sound correspondences (SCs) have been found to be learnable phonological patterns in second dialect acquisition. Cross-linguistically, SCs consist of similar as well as distinct variants. However, in the study of SC learning, the effect of the similarity between the corresponding variants remains understudied. The salience hypothesis proposes that distinct dialect variants are more salient and learnable, while the learning bias hypothesis in phonological learning predicts that SC patterns with similar variants are preferred by learners. We conducted an artificial language learning experiment to test how sound similarity affects SC learning. Specifically, the degrees of similarity between variants were evaluated from multidimensional metrics, including phonetic and phonological measures, which are cross-validated with typological evidence. While there was no effect of variant similarity in learning simple one-to-one SCs, a preference for the most distinct dialect variant was found in the learning of SCs exhibiting more complex mapping structures (i.e., two-to-one and one-to-two). Our results confirm a preference for distinct variants in SC learning, although this effect relies on two conditions. First, the preference for distinction emerges only in the presence of complex mapping structures. Second, this preference requires an activation threshold, in that the distance of the SC must be sufficiently large to trigger the effect.

Language and Speech, Ahead of Print.
Research in the last few decades has examined the intersection between phonetics and politeness in multiple languages. While most of the studies have analyzed the role of politeness on suprasegmental features (i.e., pitch or duration), few have considered the key contextual variables of power, distance, and imposition. This study investigates the systematic effects of power, distance, and imposition on the final intonational contours of polar questions in Central Peninsular Spanish native speakers. A total of 36 native speakers from Madrid completed a contextualized reading-sentence task in which they read aloud paragraph-length contextualizing situations and the target polar questions. The situations were balanced for two levels of power (high/low), distance (high/low), and imposition (high/low). The results from the contextualized reading-sentence task showed that the low-rising final intonational contour (L*H%) was the most employed intonational contour in every context, while the remaining contours were H*H%, H*L%, L*L%. The results confirm that L*H% is the prevailing final intonational contour in Spanish polar questions while also shedding light on the variability of other intonational configurations. In addition, the study determines whether final nuclear contours are impacted by power, distance, and impositions. The findings are discussed within the framework of Politeness Theory and the work on the phonetics and pragmatics interface.

Language and Speech, Ahead of Print.
Adapting one’s speaking style is particularly crucial as children start interacting with diverse conversational partners in various communication contexts. The study investigated the capacity of preschool children aged 3–5 years (n = 28) to modify their speaking styles in response to background noise, referred to as noise-adapted speech, and when talking to an interlocutor who pretended to have hearing loss, referred to as clear speech. We examined how two modified speaking styles differed across the age range. Prosody features of conversational, noise-adapted, and clear speech were analyzed, including F0 mean (Hz), F0 range (Hz), energy in 1–3 kHz range (dB), speaking rate (syllables per second), and the number of pauses. Preschoolers adjusted their prosody features in response to auditory feedback interruptions (i.e., noise-adapted speech), while developmental changes were observed across the age range for clear speech. To examine the functional effect of the modified hyper-speech produced by the preschoolers, speech intelligibility was also examined in adult listeners (n = 30). The study found that speech intelligibility was higher in noise-adapted speech than in conversational speech across the preschool age range. A noticeable increase in speech intelligibility for clear speech was observed with the increasing age of preschool talkers, aligning with the age-related enhancements in acoustic prosody for clear speech. The findings indicate that children progressively develop their ability to modify speech in challenging environments, initiating and refining adaptations to better accommodate their listeners.

Language and Speech, Ahead of Print.
The present study examines the perceptual salience of tonal speech errors compared with segmental errors (consonant and vowel). Tonal errors are observed less often than segmental errors. We thus hypothesize that tone errors are more easily ignored during transcription tasks because tones may have lower perceptual salience relative to segments. We test this hypothesis in Mandarin, via a number reconstruction task. Sixty-nine Mandarin native listeners heard sequences of numbers in which one number was altered by substituting its vowel, consonant, or tone. They were asked to identify which number that was. We found that Mandarin listeners identified the original number most accurately when consonants were substituted. They were the least accurate when vowels were substituted. For tone substitution, the accuracy was lower than for consonant substitution, but not significantly different from vowel substitution. Reaction times to identify a number with tone substitution were comparable to those for other types of substitutions. The results show that, contrary to our hypothesis, tone errors are not perceptually less salient than segmental errors. Specifically, tone errors are as salient as vowel errors and more salient than consonant errors, suggesting a similar phonological status shared by tone, vowel, and consonant in constraining word selection.