HASS: Hierarchical Simulation of Logopenic Aphasic Speech for Scalable PPA Detection. - Harrison Li; Kevin Wang; Cheol Jun Cho; Jiachen Lian; Rabab Rangwala; Chenxu Guo; Emma Yang; Lynn Kurteff; Zoe Ezzes; Willa Keegan-Rodewald; Jet Vonk; Siddarth Ramkrishnan; et al. (CoRR, 2026)