“…A number of experiments have focused on the reversal of relations within equivalence classes (e.g., de Almeida & de Rose, 2015;de Almeida & Haydu, 2011;Folsta & de Rose, 2007;Garotti & de Rose, 2007;Garotti, de Souza, de Rose, Molina, & Gil, 2000;Pilgrim, Chambers, & Galizio, 1995;Pilgrim & Galizio, 1990Ribeiro, Silveira, Mackay, & de Rose, 2016;Saunders, Saunders, Kirkby, & Spradlin, 1988;Smeets, Barnes-Holmes, & Striefel, 2006;Smeets, Barnes-Holmes, Akpinar, & Barnes-Holmes, 2003). Some involved the use of two equivalence classes and others of more than two classes.…”