Effects of observing requirements towards sample and comparison stimuli in the establishment of reject control (sample/S- relations) - Perez, William Ferreira; Huziwara, Edson Massayuki; Rodrigues, Raone M; Vilela, Eduardo Cunha; Tomanari, Gerson Yukio; Vaidya, Manish (Journal of the experimental analysis of behavior, 2020)