Back from the future:Nonlinear anticipation in adults and children's speech

Purpose: This study examines the temporal organization of vocalic anticipation in German children from 3 to 7 years of age and adults. The main objective was to test for non-linearprocesses in vocalic anticipation, which may result from the interaction between lingualgestural goalsfor individual vowels, and those for their neighbors over time. Method: The technique of ultrasound imaging was employed to record tongue movement at fivetimepoints throughout short utterances of the form V1#CV2. Vocalic anticipation was examined with Generalized Additive Modeling, an analytical approach allowing forthe estimation of both linear and non-linearinfluences on anticipatoryprocesses. Results: both adults and children exhibit non-linear patterns of vocalic anticipation over time with the degree and extent of vocalic anticipation varying as a function of the individual consonants and vowels assembled. However, noticeable developmental discrepancieswere found with vocalic anticipation being present earlier in children ́sutterances at 3-4-5 years of agein comparison to adults and to some extent 7-year-old children.Conclusions: Anarrowing of speech production organization from large chunks in kindergarten to more contextually-specified organizationsseems to occur fromkindergarten toprimary school toadulthood, although variation in the temporal overlap of lingual gestures for consecutive segments is already present in the youngestcohorts. In adults, non-linear anticipatory patterns over time suggest a strong differentiation between the gestural goals for consecutive segments. In children, this differentiation is not yet mature: vowelsshow greater prominence over time and seem activated more in-phase with those of previous segments relative to adults

A review of data collection practices using electromagnetic articulography

This paper reviews data collection practices in electromagnetic articulography (EMA) studies, with a focus on sensor placement. It consists of three parts: in the first part, we introduce electromagnetic articulography as a method. In the second part, we focus on existing data collection practices. Our overview is based on a literature review of 905 publications from a large variety of journals and conferences, identified through a systematic keyword search in Google Scholar. The review shows that experimental designs vary greatly, which in turn may limit researchers' ability to compare results across studies. In the third part of this paper we describe an EMA data collection procedure which includes an articulatory-driven strategy for determining where to position sensors on the tongue without causing discomfort to the participant. We also evaluate three approaches for preparing (NDI Wave) EMA sensors reported in the literature with respect to the duration the sensors remain attached to the tongue: 1) attaching out-of-the-box sensors, 2) attaching sensors coated in latex, and 3) attaching sensors coated in latex with an additional latex flap. Results indicate no clear general effect of sensor preparation type on adhesion duration. A subsequent exploratory analysis reveals that sensors with the additional flap tend to adhere for shorter times than the other two types, but that this pattern is inverted for the most posterior tongue sensor

The influence of alcohol on L1 vs. L2 pronunciation

In this study, we investigated the influence of alcohol intake on pronunciation in both a native and a non-native language. At a Dutch music festival, we recorded the speech of 87 participants in Dutch (native language) and English (non-native language) when reading a few sentences in both languages. The recorded audio samples were judged by 108 sober native Dutch speakers in a perception experiment at the same festival. Participants were asked to judge how clear the Dutch pronunciations of a random selection of speakers were and how native-like the English pronunciations were. The results, analysed using generalized additive modelling (which is able to identify non-linear relationships), indicated a small linear negative relationship between alcohol intake and clarity of Dutch speech. For English there was no effect of alcohol intake on the native-likeness of the English pronunciations

The influence of alcohol on L1 vs. L2 pronunciation

In this study, we investigated the influence of alcohol intake on pronunciation in both a native and a non-native language. At a Dutch music festival, we recorded the speech of 87 participants in Dutch (native language) and English (non-native language) when reading a few sentences in both languages. The recorded audio samples were judged by 108 sober native Dutch speakers in a perception experiment at the same festival. Participants were asked to judge how clear the Dutch pronunciations of a random selection of speakers were and how native-like the English pronunciations were. The results, analysed using generalized additive modelling (which is able to identify non-linear relationships), indicated a small linear negative relationship between alcohol intake and clarity of Dutch speech. For English there was no effect of alcohol intake on the native-likeness of the English pronunciations