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Voice quality is crucial to the art of the broadcast speaker. Acceptable voice quality is a necessity for an acceptable microphone voice and essential therefore for employment as a broadcaster. This thesis investigates the characteristics of the voice which provide that acceptability; and categorises the features which lead the listener to make judgements about their vocal likes and dislikes. These subjective judgements are explored by investigating the psychological, medical, and innate features contributing to the vocal perceptions of the listener. Voice quality is related to the efficiency of the larynx and its importance to voice production; and to the various vocal disorders which can affect the broadcaster. It becomes evident throughout the thesis that each listener receives a clear impression of the personality of the speaker through the features present in the voice. Many of these impressions however are based on stereotypes. The thesis relates these stereotypical judgements to accents, investigating their relationship to the 'BBC' voice, the 'World Service' voice, the 'ILR' voice and the 'reporter's voice' . It is shown that the listener's subjective impression of the voice and the broadcaster personality is formed by the presentational and physical aspects of voice quality. Listener perceptions of voice acceptability are tested and discussed. The data is analysed to provide a set of dominant characteristics from which are drawn voice histograms and frequency polygons. The result is a set of preferred voice characteristics which apply specifically to the broadcast speaker and which can be sought during the selection process.

This thesis explores the effect of vocal affect expression on communicative effectiveness. Two studies examined whether positive speaker affect facilitates the encoding and decoding of the message, combining methods from Phonetics and Psychology.

This thesis reports a series of nine inter-linked experiments examining the influence of different levels of verbal confidence on choice and interpersonal perceptions. Chapter 1 identifies the levels of confidence associated with some everyday expressions of confidence, expressions that are used as ‘confidence cues’ in subsequent experimental chapters. Chapter 2 examines the influence of confidence cues with different types of task, and Chapter 3 relates these influences to individual differences. Chapter 4 considers our perceptions of speakers who express different levels of confidence, then Chapters 5 and 6 examine whether these perceptions, and the subsequent use of their information, change when performance feedback is made available. Chapter 7 examines whether our own confidence level affects the extent to which a speaker’s confidence influences us then Chapter 8 determines if a speaker’s confidence exerts a positive or negative influence, while Chapter 9 investigates how the influence of confidence is influenced by the timing of the advice. The results indicate that confidence is an effective form of influence, providing evidence that a confidence heuristic is used, whereby a speaker’s confidence is taken as a cue to their accuracy, knowledge, and competency. The extent to which the confidence heuristic is used when making choices strongly depends on one’s own level of confidence, whether this was due to the type of task being tackled, the difficulty of the task, or the timing of the advice, with people relying more on the confidence heuristic as their own confidence decreased, although there were some individual differences mediating the extent of this. Increasing levels of speaker confidence lead to speakers being perceived more positively in terms of competency, but too much confidence was found to be detrimental in terms of how much a speaker was liked. Issues raised by this thesis, and directions for further research are considered in the Discussion.

Text in Afrikaans / In hierdie studie word die rol van interpersoonlike komrnunikasie in die funksionering van die algemene inligtingsdiens van die Unisa Biblioteek aan die Universiteit van Suid-Afrika ondersoek. 'n Kwantitatiewe meetinstrument word ontwikkel om gebruikertevredenheid met die hoofkomponente van die algemene inligtingsdiens, naamlik die inligtingsassistent, die inligting wat deur die klient ontvang word en die fisiese omgewing waarin die diens gelewer word, te evalueer. Daar word bevind dat 'n beduidende assosiasie bestaan tussen gebruikertevredenheid met die inligtingsassistent en gebruikertevredenheid met die inligting wat ontvang word. 'n Verkorte vrae lys word ontwerp en aanbevee 1 as 'n meetinstrument waarmee die bestuur gebruikertevredenheid met die algemene inligtingsdiens op 'n gereelde grondslag kan meet. / This study investigates the role of interpersonal communication in the functioning of the general information service provided by the Unisa Library at the University of South Africa. A quantitative measuring instrument is developed to evaluate user satisfaction with the main components of the general information service, that is the information assistant, the information received by the client and the physical surroundings in which the service is provided. It is found that a significant association exists between user satisfaction with the information assistant and user satisfaction with the information received. A shortened questionnaire is designed and recommended as a measuring instrument with which management can on a regular basis measure user satisfaction with the general information service. / Communication Science / M.A. (Communication)

Text in Afrikaans / In hierdie studie word die rol van interpersoonlike komrnunikasie in die funksionering van die algemene inligtingsdiens van die Unisa Biblioteek aan die Universiteit van Suid-Afrika ondersoek. 'n Kwantitatiewe meetinstrument word ontwikkel om gebruikertevredenheid met die hoofkomponente van die algemene inligtingsdiens, naamlik die inligtingsassistent, die inligting wat deur die klient ontvang word en die fisiese omgewing waarin die diens gelewer word, te evalueer. Daar word bevind dat 'n beduidende assosiasie bestaan tussen gebruikertevredenheid met die inligtingsassistent en gebruikertevredenheid met die inligting wat ontvang word. 'n Verkorte vrae lys word ontwerp en aanbevee 1 as 'n meetinstrument waarmee die bestuur gebruikertevredenheid met die algemene inligtingsdiens op 'n gereelde grondslag kan meet. / This study investigates the role of interpersonal communication in the functioning of the general information service provided by the Unisa Library at the University of South Africa. A quantitative measuring instrument is developed to evaluate user satisfaction with the main components of the general information service, that is the information assistant, the information received by the client and the physical surroundings in which the service is provided. It is found that a significant association exists between user satisfaction with the information assistant and user satisfaction with the information received. A shortened questionnaire is designed and recommended as a measuring instrument with which management can on a regular basis measure user satisfaction with the general information service. / Communication Science / M.A. (Communication)