Interaction between Phrasal Structure and Vowel Tenseness in German: An Acoustic and Articulatory Study

Phrase-final lengthening affects the segments preceding a prosodic boundary. This prosodic variation is generally assumed to be independent of the phonemic identity. We refer to this as the ‘uniform lengthening hypothesis’ (ULH). However, in German, lax vowels do not undergo lengthening for word stress or shortening for increased speech rate, indicating that temporal properties might interact with phonemic identity. We test the ULH by comparing the effect of the boundary on acoustic and kinematic measures for tense and lax vowels and several coda consonants. We further examine if the boundary effect decreases with distance from the boundary. Ten native speakers of German were recorded by means of electromagnetic articulography (EMA) while reading sentences that contained six minimal pairs varying in vowel tenseness and boundary type. In line with the ULH, the results show that the acoustic durations of lax vowels are lengthened phrase-finally, similarly to tense vowels. We find that acoustic lengthening is stronger the closer the segments are to the boundary. Articulatory parameters of the closing movements toward the post-vocalic consonants are affected by both phrasal position and identity of the preceding vowel. The results are discussed with regard to the interaction between prosodic structure and vowel tenseness.

An Argument for Phonological Stress in French: the syntagm over contrast

It is standardly assumed that French does not have word-stress, rather it has phrase-level prominence. I will advance a number of arguments, many of which have appeared already in the literature, that cumulatively suggest that French roots are characterized by phonological prominence, even if this is non-contrastive. By prominence, I mean a syntagmatically distributed strength that has all the phonological characteristics of stress in other Romance languages. I will remain agnostic about the nature of that stress, eschewing the lively debate about whether French has feet, and if so what type, and at what level. The structure of the argument is as follows. French demonstrably has phonological word-final strength but one wonders what the source of this strength is. Positionally, the initial position is strong and, independently of cases where it is reinforced by other factors, the final position is weak. I will argue, based on parallels with other Romance languages, that French word-final strength derives from root-final phonological stress. The broader significance of this conclusion is that syntagmatic properties are enough to motivate underlying forms, even in the absence of paradigmatic contrasts (minimal pairs).

Twee problematische foneemopposities door de eeuwen heen: /s/-/z/ en /f/-/v/ in het Nederlands

Two problematic phoneme oppositions through the centuries: /s/-/z/ and /f/-/v/ in Dutch Dutch has a set of solid phoneme oppositions such as /t/-/d/, /p/-/b/ which manifest themselves in minimal pairs such as /p/ak-/b/ak, /t/ak-/d/ak, ra/t/en-ra/d/en which are quite numerous. This is different in the case of /s/-/z/ and /f/-/v/. There are not many minimal pairs and although it is generally accepted that /s/-/z/ and /f/-/v/ form phoneme oppositions, there are homonyms for many a speaker in cases such as /f/ier and /v/ier, /s/ein and /z/ijn, especially in the Dutch of the Netherlands. It will be argued that the phoneme opposition /s/-/z/ has been weak through the centuries and that the phoneme opposition /f/-/v/ only has become weak recently. In the latter case the recently formed labiodental [ʋ] out of bilabial [w] may have triggered the [v] to become [f]. Spelling forms in charters as well as statements and spellings of Renaissance grammarians are analysed, just as data from Modern Dutch dialects. This study shows how phoneme oppositions can become stronger and weaker over time.

How explicit instruction improves phonological awareness and perception of L2 sound contrasts in younger and older adults

Despite the importance of conscious awareness in second language acquisition theories, little is known about how L2 speech perception can be improved by explicit phonetic instruction. This study examined the relationship between phonological awareness and perception in Dutch younger and older adult L2 listeners, focusing on English contrasts of two types: a familiar contrast in an unfamiliar position (word-final /t/-/d/) and an unfamiliar contrast (/æ/-/ε/). Awareness was assessed with a task in which written minimal pairs and homophone pairs had to be judged as sounding the same or different. Perception was assessed with a two-alternative forced-choice identification task with auditorily presented words from minimal pairs. We investigated whether listeners’ awareness and perception improved after a video-based explicit instruction that oriented their attention to one of these contrasts, and we tested whether including information about the phonetic cue of vowel duration increased learning. Awareness and perception of each contrast were shown to be moderately correlated at the study’s outset. Furthermore, awareness and perception for each contrast generally improved more after the instruction drawing attention to that contrast. However, the effectiveness of explicit phonetic instruction varied depending on the combination of the contrast, cue information, and listener age group.

Indexical borders: the sociolinguistic scales of the shibboleth

This paper engages with the notion of the shibboleth, an indexically loaded, usually referentially indifferent set of (ideologically constructed) minimal pairs that is used in order to mark and perform social differentiation. We argue that the shibboleth is to be considered an interpretive (metapragmatic) phenomenon that operates on different sociolinguistic scales, notably the discursive scale (ideologies of communication), the performative scale (performance and metapragmatic stance-taking), and the subjective scale (lived experience). We propose a scalar metapragmatic theory of the shibboleth as an “indexical border” that takes into account how shibboleths emerge (are enregistered) and how they depend on contextualisation (or the indexical field). As a case in point, we present analyses of biographical construals of sociolinguistic displacement in the context of remigration from German-speaking countries to Bosnia and Herzegovina. Specifically, we focus on construals of displacement that are connected with (mis-)performances of phonologically rather subtle but indexically highly salient Bosnian/Croatian/Serbian affricate shibboleths (<č/dž> and <ć/đ>).

Laughing Heads: Can Transformers Detect What Makes a Sentence Funny?

The automatic detection of humor poses a grand challenge for natural language processing. Transformer-based systems have recently achieved remarkable results on this task, but they usually (1) were evaluated in setups where serious vs humorous texts came from entirely different sources, and (2) focused on benchmarking performance without providing insights into how the models work. We make progress in both respects by training and analyzing transformer-based humor recognition models on a recently introduced dataset consisting of minimal pairs of aligned sentences, one serious, the other humorous. We find that, although our aligned dataset is much harder than previous datasets, transformer-based models recognize the humorous sentence in an aligned pair with high accuracy (78\%). In a careful error analysis, we characterize easy vs hard instances. Finally, by analyzing attention weights, we obtain important insights into the mechanisms by which transformers recognize humor. Most remarkably, we find clear evidence that one single attention head learns to recognize the words that make a test sentence humorous, even without access to this information at training time.

Automatic Speech Recognition (ASR) Systems Applied to Pronunciation Assessment of L2 Spanish for Japanese Speakers

General-purpose automatic speech recognition (ASR) systems have improved in quality and are being used for pronunciation assessment. However, the assessment of isolated short utterances, such as words in minimal pairs for segmental approaches, remains an important challenge, even more so for non-native speakers. In this work, we compare the performance of our own tailored ASR system (kASR) with the one of Google ASR (gASR) for the assessment of Spanish minimal pair words produced by 33 native Japanese speakers in a computer-assisted pronunciation training (CAPT) scenario. Participants in a pre/post-test training experiment spanning four weeks were split into three groups: experimental, in-classroom, and placebo. The experimental group used the CAPT tool described in the paper, which we specially designed for autonomous pronunciation training. A statistically significant improvement for the experimental and in-classroom groups was revealed, and moderate correlation values between gASR and kASR results were obtained, in addition to strong correlations between the post-test scores of both ASR systems and the CAPT application scores found at the final stages of application use. These results suggest that both ASR alternatives are valid for assessing minimal pairs in CAPT tools, in the current configuration. Discussion on possible ways to improve our system and possibilities for future research are included.

Automatic Speech Recognition (ASR) Systems Applied to Pronunciation Assessment of L2 Spanish for Japanese Speakers

General&ndash;purpose automatic speech recognition (ASR) systems have improved their quality and are being used for pronunciation assessment. However, the assessment of isolated short utterances, as words in minimal pairs for segmental approaches, remains an important challenge, even more for non-native speakers. In this work, we compare the performance of our own tailored ASR system (kASR) with the one of Google ASR (gASR) for the assessment of Spanish minimal pair words produced by 33 native Japanese speakers in a computer-assisted pronunciation training (CAPT) scenario. Participants of a pre/post-test training experiment spanning four weeks were split into three groups: experimental, in-classroom, and placebo. Experimental group used the CAPT tool described in the paper, which we specially designed for autonomous pronunciation training. Statistically significant improvement for experimental and in-classroom groups is revealed, and moderate correlation values between gASR and kASR results were obtained, beside strong correlations between the post-test scores of both ASR systems with the CAPT application scores found at the final stages of application use. These results suggest that both ASR alternatives are valid for assessing minimal pairs in CAPT tools, in the current configuration. Discussion on possible ways to improve our system and possibilities for future research are included.