**Cortical travelling waves relate to variation in personality traits** Neil W Bailey, Luiza Bonfim Pacheco, Luke D. Smillie Published in Imaging Neuroscience (2025) ***Purpose of the shared data:*** Data contained in this Open Science Framework repository is provided for the purpose of ensuring transparency of the results reported in the manuscript “Cortical travelling waves relate to variation in personality traits”, published in Imaging Neuroscience (2025). Users can run the code (also included in the repository) on the data to replicate the results reported in the manuscript. Use of the data for other purposes (including but not limited to research aimed at answering related or unrelated questions to those examined in the manuscript) is prohibited. If users would like to access the full data for an alternative use to reproducing the analyses reported in the manuscript, they can contact Prof. Luke Smillie at lsmillie@unimelb.edu.au. ***Details of the data:*** The provided electroencephalography (EEG) data contains the pre-processed and epoched eyes-open resting EEG signal from the 35 electrodes required to implement the analyses reported in the manuscript for each of the participants included in the analysis. Details of the EEG recording and pre-processing methods can be found in the manuscript. Note that the data provided is only a subset of the full data. In particular, the original data included 64 electrodes. ***Details of the code*** The code provided in the repository is provided with the GNU General Public License, without any warranty. If any part of the code is used or adapted for future research, the associated manuscript must be cited. Two Matlab scripts are provided. One script applies a 3D Fast Fourier Transform (3D-FFT) to the data and a null version of the data (with the electrode order shuffled) to compute travelling wave strengths (above the null), then applies cluster-based statistics to test the potential significance of correlations between each travelling wave direction and frequency and each personality trait. The second script performs a 2D FFT on selected EEG electrode lines to enable post-hoc explorations of correlations between specific travelling wave directions and specific personality traits. Note that due to the permutation methods applied to both estimate the strength of the travelling waves above the null and to test the statistical significance of the correlations, exact values provided by the scripts may vary slightly from those reported in the manuscript (as well as varying between implementations of the scripts). However, we expect that the direction of effects and the significance of the results should be consistent each time.