Performance Grammar (PG) is a psycholinguistically motivated grammar
formalism. It aims to describe and explain intuitive judgments and other data
concerning the well-formedness of sentences of a language, but at the same
contributes to accounts of syntactic processing phenomena
observable during language comprehension and language production.
Garrett (1975) identifies two stages of syntactic
an early `functional' and a later `positional' stage. This distinction has
since been adopted by most students of language production (e.g., see
(Bock and Levelt 1994)).
Accordingly, we assume that
syntactic tree formation in PG is a two-stage process. First, an unordered
hierarchical structure (`mobile') is assembled out of lexical building
blocks. The key operation at work here is feature unification, which also
delimits the positional options of the syntactic constituents. During the
second step, the branches of the mobile are temporally arranged by a `read-out'
module that realizes one positional option of every constituent.
Download the most recent version COMPASSIII (cf. guided
tour through COMPASSIII). The user can select words from the
lexicon and drag them into the workspace. Here treelets can be
combined by moving a tree to an appropriate footnode. It desired
treed can be teared appart again. The word order component is
realized by the grey quared boxes where the user sorts all filled
grammatical function elements into
(even accross several levels as for promotion). System reacts with
feedback on a background in a traffic-light-inspired color
to any action by the student.
Literature on the formalism, its features and its complexity
Automatic online writing support for L2 learners of German
through output monitoring
by a natural-language paraphrase generator. Karin Harbusch and Gerard Kempen.
In: Mike Levy, Françoise Blin, Claire Bradin Siskin and Osamu Takeuchi
WORLDCALL - International Perspective on Computer-Assisted Language
Routledge, New York, NY, 2011, pp. 128-143 (see also Supplement: Guided Tour through the COMPASSII system).
Computing Accurate Grammatical Feedback in a Virtual Writing Conference for German-Speaking Elementary-School Children: An Approach Based on Natural Language Generation. Karin Harbusch, Gergana Itsova, Ulrich Koch and Christine Kühner
In: CALICO Journal, Vol. 20, No. 3, May 2009, pages 626-643.
The Sentence Fairy: A natural-language generation system to support
children's essay writing. Karin Harbusch, Gergana Itsova, Ulrich Koch and Christine Kühner
In: Computer Assisted Language Learning, Vol. 21, No. 4, October 2008, pages 339-352.