Vaughn, S., Swanson, E., Roberts, G., Martinez, L., Wanzek, J., Simmons, D., Clemens, N., & Fogarty, M. (2021). Vocabulary and Comprehension (VoCO) Project. LDbase. http://ldbase.org/datasets/38a9b8a2-65e3-425a-8480-5d3e94b37f45