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The Pattern of Vocal Signals and the Information They Convey

Amotz Zahavi
Behaviour
Vol. 80, No. 1/2 (1982), pp. 1-8
Published by: Brill
Stable URL: http://www.jstor.org/stable/4534171
Page Count: 8
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The Pattern of Vocal Signals and the Information They Convey
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Abstract

1. The vocal signal is an indicator of the posture and movement (P.M.) of the signaller at the time of vocalization, hence it reveals, by an additional modality, information about the P.M. of the signaller. 2. The vocal signal is a reliable indicator of the motivation of the signaller because cheating would incur the cost of changing the P.M. away from the optimal P.M. for the real motivation. 3. Certain vocal patterns discriminate better than others small differences in the motivation of individuals. 4. The vocal signal which conveys a certain motivation is dependent on a) the strategy used to solve a particular conflict; b) the kind of reliable information which may resolve the conflict; c) the P.M. which conveys best such information; d) the vocal pattern which enables the listener to distinguish between signallers which differ slightly in their motivation. /// 1. Lautsignale weisen auf Stellung und Bewegung (P.M.) des Signalisierenden im Moment der Lautgebung hin. Daher geben sie zusätzliche Information über die P. M. des Signalisierenden. 2. Das Lautsignal ist ein zuverlässiger Anzeiger für die Motivierung des Signalisierenden. Wenn der Signalisierende betrügen würde, müsste er die Kosten für die Änderung des optimalen P.M. der wirklichen Motivation tragen. 3. Bestimmte Lausmuster geben besser als andere kleine Unterschiede in der Motivation von Individuen zu erkennen. 4. Das Lautsignal, das eine bestimmte Motivation übermittelt, hängt ab von: a) der Strategie, die benutzt wird um einen bestimmten Konflikt zu lösen; b) der Art der zuverlässigen Information die den Konflikt lösen könnte; c) der P.M., die am besten solche Information übermittelt; d) dem Lautmuster, welches es dem Hörer ermöglicht, zwischen Signalisierenden zu unterscheiden, die in ihrer Motivation nur wenig verschieden sind.

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