Porras-Chaverri, M.A. and Pocasangre-Fonseca, R. 2021. Perception of social variables related to allophones of taps and trills: a preliminary study with costa rican middle class speakers. Cadernos de Linguística. 2, 1 (Dec. 2021), e593. DOI:https://doi.org/10.25189/2675-4916.2021.v2.n1.id593.