This data package forms a supplement to the dataset 'Production of intonational phrase boundaries in Dutch'. This package contains the subjects key file, consent forms and the sign-off list that are used in the experiment. This dataset is closed-access, but the pseudonymized experimental data are available in the dataset 'Production of intonational phrase boundaries in Dutch', for which access can be requested. For more details about the study, see the article 'Production of intonational phrase boundaries in Dutch'.