The package includes a dataset with measurements of 17 PTSD symptoms taken from 344 individuals. See McNally et al. (2015) for more details.
McNally, R. J., Robinaugh, D. J., Wu, G. W., Wang, L., Deserno, M. K., & Borsboom, D. (2015). Mental disorders as causal systems: A network approach to posttraumatic stress disorder. Clinical Psychological Science, 3(6), 836-849.