Open Access

Ursula Wingate

• The research reported in this thesis examines two main questions: firstly, which dictionary type, bilingual or monolingual, is most effective for intermediate learners of German for reading comprehension, and secondly, which features make monolingual dictionary definitions effective for these learners. These questions divide the thesis into two parts. The first part compares the effectiveness of the bilingual versus the monolingual dictionary, and the second part compares two different monolingual definition styles. The research was originally motivated by the observation that Hong Kong Chinese intermediate learners of German prefer to use a German-English bilingual dictionary. Since the translations are presented in the learners' second language, the effectiveness of this bilingual dictionary is doubtful. On the other hand, the learners are reluctant to use the monolingual dictionary, recommended to them by their language teachers. Three investigations were conducted in order to gain more detailed knowledge about the learners' dictionary preference, and the effectiveness of the two dictionary types. The learners' dictionary preference was investigated by means of a survey of ninety-eight foreign language students. The effectiveness of the bilingual and monolingual dictionary for reading comprehension and incidental vocabulary learning was first measured experimentally. The think-aloud method was then used in order to discover factors which determine the effectiveness of the two dictionary types. The results of the experiment revealed that the German-English bilingual dictionary was not significantly more effective for the learners than the monolingual dictionary. The only monolingual dictionary available for German at that time, however, is linguistically too difficult for this proficiency level. Because of these findings, the research turned to monolingual dictionary definitions with the aim of identifying features that make them accessible to intermediate learners. Based on findings from the first think-aloud study, and principles promoted as user-friendly in the lexicographic literature, new definitions were developed for the target words in the research. These new definitions were compared with those in the existing dictionary. A second think-aloud study was conducted in order to generate hypotheses about individual definition features. These hypotheses were then tested in the second experiment, which was conducted with eighty-six learners of German in Shanghai. The investigations reveal several features that determine the effectiveness of monolingual definitions for intermediate learners. The findings have theoretical and pedagogical implications. In the theoretical field, some lexicographic principles were recommended that are, unlike previous principles, based on empirical insights into user needs. In the pedagogical field, the research findings provide an empirical basis for the evaluation and recommendation of suitable dictionaries to intermediate learners. A model of dictionary effectiveness is proposed. This model could help to assess the effectiveness of different information categories in dictionaries for different proficiency levels and different activity contexts. It could also provide lexicographic principles for the design of dictionaries. This research contributes one component to the proposed model: criteria for the effectiveness of definition features for intermediate learners in the activity context of reading.