Probabilistic reduction in relation to social message predictability

Abstract

AbstractLanguage is a system of message transmission, which conveys a variety of messages including both lexical messages and social messages. It has been demonstrated that lexical messages are realized with phonetically reduced signals, when they are contextually predictable. For example, a word may be produced with shorter duration, when it is more predictable given a context such as a preceding word and a following word. This message-oriented reduction can be encapsulated by positing that a speaker is required to balance two biases: a bias for maximizing the accuracy of message transmission and a bias for maximizing the efficiency of message transmission. This raises a question: Does a speaker balance the two biases in relation to social messages? The aim of this study is to address this question, and advance our understanding of the message-oriented probabilistic reduction. We will explore the social-message-predictability effects by examining the phonetic redundancy in a variant in New Zealand English loanword phonology, a tap sound [ɾ]. It is demonstrated that the duration of this rhotic variant is affected by the social message predictability given a loanword.