The xxx.psydat files are pickled files of PsychoPy ExperimentHandlers
They can be analysed using the analysis_batch.py file. Run that file from a python interpreter, select the raw data files you wish to include in the analysis and press <return>. A `figs` folder will be created next to the analysis file and populated with figures (png and eps files) for each of the conditions. If you select **all** the data files the figures generated should match those in the published article.