The German Lexicon Project

The German Lexicon Project (GLP) is a new, collaborative initiative for collecting large-scale lexical decision data for German words. The GLP is modeled on successful examples such as the English (Balota et al., 2007), Dutch (Keuleers et al., 2010), and British (Keuleers et al., 2012) Lexicon Projects and aims to create an open, high-quality resource for the psycholinguistic research community.

As a core group that emerged from the DFG network TRUST, we developed stimuli and programmed an online experiment that is hosted by Humboldt University in Berlin. In preparing the study, we followed the guidelines that were created by the TRUST network. Data collection started in December 2025 and finished at the end of May 2026.

The resulting open dataset will contain behavioral data from over 2000 participants, providing a robust resource to address fundamental questions about lexical, orthographic, and semantic processing in German.

GLP data collection over time (From the GLP data collection tracker).

We will share the dataset openly once the associated manuscript, data processing, and metadata are complete.

Data collection for (this stage of) the GLP is now complete, but we are planning future collaborations using the same network. If you are interested in getting involved, you can contact Tanja Römbke (tanja.roembke@psych.rwth-aachen.de) or Jana Hasenäcker (jana.hasenaecker@uni-erfurt.de) for more information.