This article reports the results of a study on the self-embedding depth of nominal, verbal and clausal projections in spoken corpora of German. We compared two spoken registers featuring public and non-public (i.e. private) conversation by measuring the depth of self-embedding in C, V, and N projections. The findings confirm the hypothesis that the familiarity of the speech situation (public vs. non-public speech) has a significant impact on complexity in terms of self-embedding: speakers use more self-embedding in public speech production in different syntactic projections. In addition, we examined previous assumptions about the differences between right, left, and center embedding in C projections. The results confirm a preference against center embedding in non-public texts, which reflects the complexity of center embedding. Finally, we find evidence that the depth of self-embedding in V and C projections is correlated. This finding suggests that self-embedding depth is part of a general strategy, i.e., speakers select more or less complex structures (of different types) depending on factors of the speech situation.
