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FnhdC/HTML und FnhdC/S
(2007)
We compare the use of überhaupt and sowieso in Dutch and German. We use the world-wide web as the main resource and pursue a zigzag strategy, trying to find usages going back and forth between dictionaries, intuitions and real data obtained through web search. To our surprise, the results more or less confirm the decision of Dutch dictionaries to consider überhaupt and sowieso synonymous. In German, we find no synonymy, but only a great overlap of usage conditions in declarative sentences.
From Proof Texts to Logic. Discourse Representation Structures for Proof Texts in Mathematics
(2009)
We present an extension to Discourse Representation Theory that can be used to analyze mathematical texts written in the commonly used semi-formal language of mathematics (or at least a subset of it). Moreover, we describe an algorithm that can be used to check the resulting Proof Representation Structures for their logical validity and adequacy as a proof.
This paper discusses the semi-formal language of mathematics and presents the Naproche CNL, a controlled natural language for mathematical authoring. Proof Representation Structures, an adaptation of Discourse Representation Structures, are used to represent the semantics of texts written in the Naproche CNL. We discuss how the Naproche CNL can be used in formal mathematics, and present our prototypical Naproche system, a computer program for parsing texts in the Naproche CNL and checking the proofs in them for logical correctness.
Accentuation, Uncertainty and Exhaustivity - Towards a Model of Pragmatic Focus Interpretation
(2010)
This paper presents a model of pragmatic focus interpretation that is assumed to be part of a complete language comprehension model and that is inspired by Levelt's language processing model. The model is derived from our empirical data on the role of accentuation, prosodic indicators of uncertainty and context for pragmatic focus interpretation. In its present state, the model is restricted to these data, but nevertheless generates predictions.
This article evaluates the terminological component (TC) of the grammis portal on German grammar developed by the Institut für Deutsche Sprache. The TC is included into grammis to facilitate nonlinguists‘ access to the main components of the portal: Grammar in questions and answers, and the Systematic Grammar. The TC thus has the potential to be an extremely useful and important grammis component. We discuss to what extend the TC achieves its goals, and make some suggestions how it could be improved. The most important aspects considered in the evaluation are: (a) TC completeness and consistency, (b) accessibility and usability of definitions and index, (c) integration of the TC with the overall system.
The study empirically examines the interpretation of focus accents in German. To this end, a methodology is developed, and it is discussed how experimental investigation can proceed at the current state of the focus theory. Methodologically, experiments directly measuring interpretation provide an alternative to the widespread practice of using only empirical preference and production data to investigate the interpretation of stimuli, and it is shown why such an alternative is necessary.
The empirical results show that one must extend and restrict theories assuming an association of free focus and scalar implicature (exhaustivity) or question–answer congruence as follows: On the one hand, situational factors in the interpretation must be taken into account to a greater extent than until now, especially their interaction with ‘physical’ properties of the speech signal (focus marking). On the other hand, a prototypical definition of Focus is called for which connects the major concepts of focus on the phonetic-phonological, semantic and information-structural levels and takes their prototypical coincidence to be the basis of focus interpretation and corresponding intuitions.
We present an experimental approach to determining natural dimensions of story comparison. The results show that untrained test subjects generally do not privilege structural information. When asked to justify sameness ratings, they may refer to content, but when asked to state differences, they mostly refer to style, concrete events, details and motifs. We conclude that adequate formal models of narratives must represent such non-structural data.
A formal narrative representation is a procedure assigning a formal description to a natural language narrative. One of the goals of the computational models of narrative community is to understand this procedure better in order to automatize it. A formal framework fit for automatization should allow for objective and reproducible representations. In this paper, we present empirical work focussing on objectivity and reproducibility of the formal framework by Vladimir Propp (1928). The experiments consider Propp’s formalization of Russian fairy tales and formalizations done by test subjects in the same formal framework; the data show that some features of Propp’s system such as the assignment of the characters to the dramatis personae and some of the functions are not easy to reproduce.
Interested in formally modelling similarity between narratives, we investigate judgements of similarity between narratives in a small corpus of film reviews and book–film comparisons. A main finding is that judgements tend to concern multiple levels of story representation at once. As these texts are pragmatically related to reception contexts, we find many references to reception quality and optimality. We conclude that current formal models of narrative can not capture the task of naturalistic narrative comparisons given in the analysed reviews, but that the development of models containing a more reception-oriented point of view will be necessary.
The understanding of story variation, whether motivated by cultural currents or other factors, is important for applications of formal models of narrative such as story generation or story retrieval. We present the first stage of an experiment to elicit natural narrative variation data suitable for evaluation with respect to story similarity, to qualitative and quantitative analysis of story variation, and also for data processing. We also present few preliminary results from the first stage of the experiment, using Red Riding Hood and Romeo and Juliet as base texts.
Repairs for Reasoning
(2013)
We describe and experimentally investigate phenomena of modal enrichment, that is, phenomena in which a recipient non-literally interprets an utterance by creating and applying a modal operator. We give competing explanations for these phenomena - namely an explanation according to which modal enrichment is a repair procedure for making the utterance match a script of information processing vs. an explanation according to which modal enrichment is triggered by rhetorical structure.
We continue the study of the reproducibility of Propp’s annotations from Bod et al. (2012). We present four experiments in which test subjects were taught Propp’s annotation system; we conclude that Propp’s system needs a significant amount of training, but that with sufficient time investment, it can be reliably trained for simple tales.
We present a technique called event mapping that allows to project text representations into event lists, produce an event table, and derive quantitative conclusions to compare the text representations. The main application of the technique is the case where two classes of text representations have been collected in two different settings (e.g., as annotations in two different formal frameworks) and we can compare the two classes with respect to their systematic differences in the event table. We illustrate how the technique works by applying it to data collected in two experiments (one using annotations in Vladimir Propp’s framework, the other using natural language summaries).