Timo B. Roettger

Assessing incomplete neutralization of final devoicing in German

Abstract It has been claimed that the long established neutralization of the voicing distinction in domain final position in German is phonetically incomplete. However, many studies that have advanced this claim have subsequently been criticized on methodological grounds, calling incomplete neutralization into question. In three production experiments and one perception experiment we address these methodological criticisms. In the first production study, we address the role of orthography. In a large scale auditory task using pseudowords, we confirm that neutralization is indeed incomplete and suggest that previous null results may simply be due to lack of statistical power. In two follow-up production studies (Experiments 2 and 3), we rule out a potential confound of Experiment 1, namely that the effect might be due to accommodation to the presented auditory stimuli, by manipulating the duration of the preceding vowel. While the between-items design (Experiment 2) replicated the findings of Experiment 1, the between-subjects version (Experiment 3) failed to find a statistically significant incomplete neutralization effect, although we found numerical tendencies in the expected direction. Finally, in a perception study (Experiment 4), we demonstrate that the subphonemic differences between final voiceless and “devoiced” stops are audible, but only barely so. Even though the present findings provide evidence for the robustness of incomplete neutralization in German, the small effect sizes highlight the challenges of investigating this phenomenon. We argue that without necessarily postulating functional relevance, incomplete neutralization can be accounted for by recent models of lexical organization.

Grammatical number elicits SNARC and MARC effects as a function of task demands

Despite the robustness of the spatial–numerical association of response codes (SNARC) and linguistic markedness of response codes (MARC) effect, the mechanisms that underlie these effects are still under debate. In this paper, we investigate the extraction of quantity information from German number words and nouns inflected for singular and plural using two alternative forced choice paradigms. These paradigms are applied to different tasks to investigate how access to quantity representation is modulated by task demands. In Experiment 1, we replicated previous SNARC findings for number words—that is, a relative left-hand advantage for words denoting small numbers and a right-hand advantage for words denoting large numbers in semantic tasks (parity decision and quantity comparison). No SNARC effect was obtained for surface or lexical processing tasks (font categorization and lexical decision). In Experiment 2, we found that German words inflected for singular had a relative left-hand advantage, and German words inflected for plural a relative right-hand advantage, showing a SNARC-like effect for grammatical number. The effect interfered, however, with a MARC-like effect based on the markedness asymmetry of singulars and plurals. These two effects appear to be dissociated by response latency rather than task demands, with MARC being more pronounced in early responses and SNARC being more pronounced in late responses. The present findings shed light on the relationship of conceptual number and grammatical number and constrain current accounts of the SNARC and MARC effects.

The Effect of Deep Brain Stimulation on the Speech Motor System

PURPOSE Chronic deep brain stimulation of the nucleus ventralis intermedius is an effective treatment for individuals with medication-resistant essential tremor. However, these individuals report that stimulation has a deleterious effect on their speech. The present study investigates one important factor leading to these effects: the coordination of oral and glottal articulation. METHOD Sixteen native-speaking German adults with essential tremor, between 26 and 86 years old, with and without chronic deep brain stimulation of the nucleus ventralis intermedius and 12 healthy, age-matched subjects were recorded performing a fast syllable repetition task (/papapa/, /tatata/, /kakaka/). Syllable duration and voicing-to-syllable ratio as well as parameters related directly to consonant production, voicing during constriction, and frication during constriction were measured. RESULTS Voicing during constriction was greater in subjects with essential tremor than in controls, indicating a perseveration of voicing into the voiceless consonant. Stimulation led to fewer voiceless intervals (voicing-to-syllable ratio), indicating a reduced degree of glottal abduction during the entire syllable cycle. Stimulation also induced incomplete oral closures (frication during constriction), indicating imprecise oral articulation. CONCLUSION The detrimental effect of stimulation on the speech motor system can be quantified using acoustic measures at the subsyllabic level.

Tonal association in Tashlhiyt Berber: evidence from polar questions and contrastive statements *

The placement of F0 peaks in Tashlhiyt Berber is highly variable, both within and across speakers, even across repetitions of the same target sentence. We show that peak placement is determined by a number of competing factors: in addition to a general tendency for the peak to be placed on the rightmost syllable – a tendency that is stronger in questions than in statements – the peak is attracted to the syllable with the most sonorous nucleus and preferentially to heavy syllables. Moreover, in words consisting entirely of obstruents, there are three possible intonation patterns: no F0 peak at all, an anticipated peak (before the target word) or a peak on a vocoid between two obstruents. The F0 peak is analysed phonologically as a H tone that is either associated with a postlexically determined syllable or, if the syllable is not tone-bearing, aligned with the edge of the larger domain.

Integrating the discreteness and continuity of intonational categories

Abstract It has already been observed that there is no one-to-one mapping between intonational categories and the pragmatic functions they are used to express. For instance, in German a particular pitch accent (L+H ∗ ) is often used to express contrastive (corrective) focus, but neither is the use of this pitch accent confined to this function nor is this the only pitch accent used to express it. In particular, there are considerable differences across speakers in the use of pitch accents and the functions they express. In this paper we look at the phonetic parameters that are characteristic of each of these pitch accents (f0 peak alignment, tonal onglide and target height) and observe a striking similarity across speakers: All speakers modulate each parameter in the same direction, e.g. the f0 peak is aligned later for contrastive focus than for narrow focus. Whereas for some speakers this is transcribed as two different pitch accents (L+H ∗ vs. H ∗ ), for others it is not, and the peak alignment is treated as phonetic variation within one accent type (H ∗ ). To capture both the differences and similarities in intonation, we therefore argue for an integrated analysis of the discrete phonological pitch accents and the modulation of continuous phonetic parameters that characterise them.

The effects of Thalamic Deep Brain Stimulation on speech dynamics in patients with Essential Tremor: An articulographic study

Acoustic studies have revealed that patients with Essential Tremor treated with thalamic Deep Brain Stimulation (DBS) may suffer from speech deterioration in terms of imprecise oral articulation and reduced voicing control. Based on the acoustic signal one cannot infer, however, whether this deterioration is due to a general slowing down of the speech motor system (e.g., a target undershoot of a desired articulatory goal resulting from being too slow) or disturbed coordination (e.g., a target undershoot caused by problems with the relative phasing of articulatory movements). To elucidate this issue further, we here investigated both acoustics and articulatory patterns of the labial and lingual system using Electromagnetic Articulography (EMA) in twelve Essential Tremor patients treated with thalamic DBS and twelve age- and sex-matched controls. By comparing patients with activated (DBS-ON) and inactivated stimulation (DBS-OFF) with control speakers, we show that critical changes in speech dynamics occur on two levels: With inactivated stimulation (DBS-OFF), patients showed coordination problems of the labial and lingual system in terms of articulatory imprecision and slowness. These effects of articulatory discoordination worsened under activated stimulation, accompanied by an additional overall slowing down of the speech motor system. This leads to a poor performance of syllables on the acoustic surface, reflecting an aggravation either of pre-existing cerebellar deficits and/or the affection of the upper motor fibers of the internal capsule.