You 'Have' to Hear This: Using Tone of Voice to Motivate Others.

The present studies explored the role of prosody in motivating others, and applied self-determination theory (Ryan & Deci, 2000) to do so. Initial studies describe patterns of prosody that discriminate motivational speech. Autonomy support was expressed with lower intensity, slower speech rate and less voice energy in both motivationally laden and neutral (but motivationally primed) sentences. In a follow-up study, participants were able to recognize motivational prosody in semantically neutral sentences, suggesting prosody alone may carry motivational content. Findings from subsequent studies also showed that an autonomy-supportive as compared with a controlling tone facilitated positive personal (perceived choice and lower perceived pressure, well-being) and interpersonal (closeness to others and prosocial behaviors) outcomes commonly linked to this type of motivation. Results inform both the social psychology (in particular motivation) and psycho-linguistic (in particular prosody) literatures and offer a first description of how motivational tone alone can shape listeners' experiences. (PsycINFO Database Recor

An Experimental Analysis of Voice Volume for Children with Autism Spectrum Disorder

Inappropriate prosodic production is an often observed, but rarely treated, communication skill deficit for individuals with autism. Expanding on previous literature, we conducted a functional analysis on the voice volume responses (VVR) of two children with ASD utilizing similar procedures to those from Edgerton and Wine (2017). Further, we evaluated the efficacy of using visual feedback from an app and a function-based treatment to decrease inappropriate VVR and increase appropriate VVR. Results of the functional analysis indicated loud VVR was maintained by social negative reinforcement (escape from demands) for one participant and by both social negative and automatic reinforcement for another participant. Results of the intervention demonstrated a decrease in the use of loud VVRs, and an increase in the use of appropriate VVRs, for one participant. The implications of the results with respect to conducting functional analysis on VVR are discussed

Vocal-Affective Weaning and its role in musical enculturation: children’s interest in music beyond the Infant-Directed Register

Well-established theoretical approaches to the Infant-directed Register (IDReg) draw a more or less tacit causal relation between it and all future musical engagement: the former establishes a basis for the latter. However, a mechanistic, observable chain of events linking these two phenomena has only been assumed, remaining for the most part unproblematized and undescribed. This thesis represents a first systematic attempt to fill this theoretical and empirical gap by concretely linking early musicality and the first manifestations of the most characteristic and widespread Western form of musical engagement: listening to recorded music. It does so by introducing a new construct as a mediating motivational factor— Vocal- Affective Weaning (VAW) —which mainly concerns the variation of caregivers’ use of the IDReg across developmental time. The thesis is grounded and tested in three literature reviews, two theoretical chapters, and three empirical ones. In terms of main findings, little evidence is found to support the existence of VAW as depicted in the main thesis. Consequently, any direct relationship between VAW and toddlers' attention to recorded music seems doubtful. Instead, data evidences a progressive use of Infant-Directed Speech (IDSp) as an ostensive cue used in the context of Natural Pedagogy, which allows for a better understanding of the relative importance of affectivity and cognition as parallel, coexisting governing principles that exert an influence on developmental changes concerning parental use of IDSp. If anything, data highlights interaction as a much more promising element in an explanatory chain linking the IDReg and Western forms of music engagement. The mentioned mismatch between the main thesis and results is interpreted in terms of the former’s unjustified stress on ‘centripetal’ over ‘centrifugal’ attachment dynamics. Resulting data also allows to delineate more nuanced factorial and developmental accounts of toddlers’ sustained attention to musical stimuli than has been previously advanced.Becas-Chile Scholarship, CONICYT Chile CONICYT- Chile Cambridge Scholarship, Cambridge Commonwealth, European & International Trus

Emotional Prosody Processing in the Schizophrenia Spectrum.

THESIS ABSTRACT Emotional prosody processing impairment is proposed to be a main contributing factor for the formation of auditory verbal hallucinations in patients with schizophrenia. In order to evaluate such assumption, five experiments in healthy, highly schizotypal and schizophrenia populations are presented. The first part of the thesis seeks to reveal the neural underpinnings of emotional prosody comprehension (EPC) in a non-clinical population as well as the modulation of prosodic abilities by hallucination traits. By revealing the brain representation of EPC, an overlap at the neural level between EPC and auditory verbal hallucinations (AVH) was strongly suggested. By assessing the influence of hallucinatory traits on EPC abilities, a continuum in the schizophrenia spectrum in which high schizotypal population mirrors the neurocognitive profile of schizophrenia patients was established. Moreover, by studying the relation between AVH and EPC in non-clinical population, potential confounding effects of medication influencing the findings were minimized. The second part of the thesis assessed two EPC related abilities in schizophrenia patients with and without hallucinations. Firstly, voice identity recognition, a skill which relies on the analysis of some of the same acoustical features as EPC, has been evaluated in patients and controls. Finally, the last study presented in the current thesis, assessed the influence that implicit processing of emotional prosody has on selective attention in patients and controls. Both patients studies demonstrate that voice identity recognition deficits as well as abnormal modulation of selective attention by implicit emotion prosody are related to hallucinations exclusively and not to schizophrenia in general. In the final discussion, a model in which EPC deficits are a crucial factor in the formation of AVH is evaluated. Experimental findings presented in the previous chapters strongly suggests that the perception of prosodic features is impaired in patients with AVH, resulting in aberrant perception of irrelevant auditory objects with emotional prosody salience which captures the attention of the hearer and which sources (speaker identity) cannot be recognized. Such impairments may be due to structural and functional abnormalities in a network which comprises the superior temporal gyrus as a central element

Seeking and Speaking from the Heart: Influences of Respiratory Sinus Arrhythmia on Facial Mimicry and Expressed Compassion

Humans engage in affiliative, nonverbal behaviors, but the extent to which they do depends on context and individual indices of cardiac vagal activity (measured as respiratory sinus arrhythmia or RSA). RSA has been associated with many prosocial outcomes, yet few studies have actually examined its relationship with nonverbal behaviors. In Study 1, a sample of undergraduates (N = 75) viewed blocks of emotional faces (happy or sad) after a resting period, after a threat induction, and after a safety induction. Physiological measures and facial electromyography of the zygomaticus major, orbicularis oculi, and corrugator supercilii muscles were recorded. Analyses revealed that, under perceived threat, facial mimicry was enhanced, and this relationship depended on tonic RSA, such that higher tonic RSA significantly predicted relatively greater increases in facial mimicry under perceived threat. In Study 2, I sought to determine whether and to what extent measures of tonic and phasic RSA were associated with prosodic and linguistic cues of expressed compassion. A sample of 85 undergraduate participants provided baseline recordings and engaged in two tasks that elicited differentiable changes in RSA: a visual attention task to elicit vagal withdrawal, and a guided meditation to elicit vagal elevation. They then recorded two messages (expressed compassion and control) to a person in their lives who was suffering. To evaluate the effectiveness of expressed compassion, I subjected recordings to acoustic analysis, obtained listener ratings of perceived compassion from content-filtered speech, and analyzed the word content of messages. Results suggested that greater baseline RSA was associated with heightened prosodic cues of compassion (i.e., speaking more quietly), but that greater vagal withdrawal was associated with dampened prosodic cues, diminished listener-rated compassion, and an increased likelihood of using anxiety-related words. This multi-method approach demonstrated an effective technique to reliably obtain context-specific measures of RSA reactivity, and suggests the ways in which these indices of parasympathetic activity relate to social engagement behaviors. Overall, the present research provided evidence that indices of parasympathetic control are useful tools in understanding individuals’ capacity to socially engage. Implications for relationship formation and wellbeing are discussed.Doctor of Philosoph

Exploring the effects of accent on cognitive processes: behavioral and electrophysiological insights

167 p.Previous research has found that speaker accent can have an impact on a range of offline and online cognitive processes (Baus, Bas, Calabria, & Costa, 2017; McAleer, Todorov, & Belin, 2014; Stevenage, Clarke, & McNeill, 2012; Sporer, 2001). Indeed, previous studies show that there are differences in native and non-native speech processing (Lev-Ari, 2018). Processing foreign-accented speech requires the listener to adapt to an extra range of variability, suggesting that there may be an increase in the amount of attentional and cognitive resources that are needed to successfully interpret the speech signal of a foreign-accented speaker. However, less is known about the differences between processing native and dialectal accents. Is dialectal processing more similar to foreign or native speech? To address this, two theories have been proposed (Clarke & Garrett, 2004; Floccia et al, 2009). Previous studies have contributed to the plausibility of both hypotheses and importantly for the purposes of this project, previous electroencephalography experiments exploring the question have mainly used sentences as material. More studies are needed to elucidate whether foreign accent is processed uniquely from all types of native speech (both native and dialectal accents) or whether dialectal accent is treated differently from native accent, despite both being native speech variations. Accordingly, the central aim of this dissertation is to further investigate processing mechanisms of speech accent across different levels of linguistic analysis using evidence from both behavioral and electrophysiological experiments. An additional aim of this project was to look at the effects of accent on information retention. In addition to fluctuations in attentional demands, it seems that non-native accent can lead to differences in the depth of listeners¿ memory encoding (Atkinson et al., 2005). This project further aimed to study how changing the accent of the information delivered may affect how well people remember the information received. Three experiments were carried out to investigate accent processing, results and future directions are discussed

The Perception of Emotion from Acoustic Cues in Natural Speech

Knowledge of human perception of emotional speech is imperative for the development of emotion in speech recognition systems and emotional speech synthesis. Owing to the fact that there is a growing trend towards research on spontaneous, real-life data, the aim of the present thesis is to examine human perception of emotion in naturalistic speech. Although there are many available emotional speech corpora, most contain simulated expressions. Therefore, there remains a compelling need to obtain naturalistic speech corpora that are appropriate and freely available for research. In that regard, our initial aim was to acquire suitable naturalistic material and examine its emotional content based on listener perceptions. A web-based listening tool was developed to accumulate ratings based on large-scale listening groups. The emotional content present in the speech material was demonstrated by performing perception tests on conveyed levels of Activation and Evaluation. As a result, labels were determined that signified the emotional content, and thus contribute to the construction of a naturalistic emotional speech corpus. In line with the literature, the ratings obtained from the perception tests suggested that Evaluation (or hedonic valence) is not identified as reliably as Activation is. Emotional valence can be conveyed through both semantic and prosodic information, for which the meaning of one may serve to facilitate, modify, or conflict with the meaning of the other—particularly with naturalistic speech. The subsequent experiments aimed to investigate this concept by comparing ratings from perception tests of non-verbal speech with verbal speech. The method used to render non-verbal speech was low-pass filtering, and for this, suitable filtering conditions were determined by carrying out preliminary perception tests. The results suggested that nonverbal naturalistic speech provides sufficiently discernible levels of Activation and Evaluation. It appears that the perception of Activation and Evaluation is affected by low-pass filtering, but that the effect is relatively small. Moreover, the results suggest that there is a similar trend in agreement levels between verbal and non-verbal speech. To date it still remains difficult to determine unique acoustical patterns for hedonic valence of emotion, which may be due to inadequate labels or the incorrect selection of acoustic parameters. This study has implications for the labelling of emotional speech data and the determination of salient acoustic correlates of emotion