| Summary: | Particles such as German <i>auch</i> (‘also’) establish an additive relation between expressions in their scope (added constituent, AC) and context alternatives against the background of shared information (common denominator). In spoken interaction, however, explicit alternatives are not necessarily present and expressions can be construed as alternatives against different variants of a common denominator. It is the aim of the present paper to investigate to what extent the presence of alternatives influences the construction of utterances containing an additive particle. This is particularly relevant for German, where speakers can choose between an unstressed and stressed version of <i>auch</i>. We ask whether properties of the alternatives and their common denominators influence the choice to use stressed or unstressed <i>auch</i>. In a corpus study on spoken language, we classified the versions of <i>auch</i>, the particles AC, the alternatives in the preceding context and their common denominator. The results show that the speaker’s choice is influenced by the relation of the utterance to context alternatives. Specifically, the degree of explicitness of alternatives, the number of alternatives, and the degree of abstractness of the common denominator influence the continuation of the discourse, measured by the preference for one of the two variants of the particle <i>auch</i>.
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