# **Data repository**: On the acquisition of polarity items: 11- to 12-year-olds' comprehension of German NPIs and PPIs This repository contains the data and code associated with a naturalness rating experiment that was conducted with adults and 11-12-year-old children to investigate whether and for which polarity sensitive expressions (PSIs) 11-12-year-olds have acquired an adult-like knowledge of the distributional restrictions. The repository contains three folders containing the stimulus material, the data, and the code that was used to analyse the data from the experiment. Details on the method, analysis, and results are provided in the accompanying paper: Juliane Schwab, Mingya Liu, and Jutta L. Mueller (accepted). On the acquisition of polarity items: 11- to 12-year-olds' comprehension of German NPIs and PPIs. *Journal of Psycholinguistic Research. Special Issue 'The Processing of Negation and Polarity'*. ## Stimuli The stimuli folder contains several files: - The list of stimulus material used for the experiment. This corresponds to the list of stimuli in appendix A of the paper. We list both the target items and the filler items that were used in the experiment. - Two excel files containing the key to the correct answers for each comprehension question that was asked during the experiment. This can be used to identify participants who were not attentive throughout the task. Since none of our participants got a response accuracy below 90%, no participant was removed from the analysis. - An example of the audio stimuli that were used for the task. We provide the audio for one of the items in all 8 conditions. ## Data The (raw) data file for the experiment - one file for the adult sample, one for the child sample, and one combined file. All data was anonymised and stripped of any personal information about participants, but has not been otherwise modified. The data files are needed to run the analysis as provided in the "Code" folder. ## Code The R code that was used to analyse the data. First, we provide the .Rmd file that allows everyone to run our analysis on their own device. All you need is the .Rmd file and the data file (in the 'data' folder of the experiment). Second, we provide the .html output of the .Rmd file allowing everyone to see the output from our analysis without having to run it themselves, including descriptive statistics, figures, and statistical models. We provide three code files: One for the adult sample, one for the child sample, and one for the cross-sample comparison.