“…In this context, humans systematically choose the undefined comparison stimulus, excluding the one previously related with a different sample to the one presented in the current trial (e.g., Bates, 1979;Costa, McIlvane, Wilkinson, & de Souza, 2001;Dixon, 1977;Domeniconi, Costa, de Souza, & de Rose, 2007;Grassmann, Stracke, & Tomasello, 2009;Grassmann, Schulze, & Tomasello, 2015;McIlvane, Bass, O'Brien, Gerovac, & Stoddard, 1984;McIlvane, Klendaras, Lowry, & Stoddard, 1992;Stromer & Osborne, 1982;Wilkinson, Rosenquist, & McIlvane, 2009). Wilkinson, de Souza, and McIlvane (2000) indicate that this performance is widely replicable, with diverse populations of different development levels.…”