“…Such adjustments are sometimes enforced by explicit instructions (Haran, Moore, & Morewedge, 2010), and sometimes encouraged by introducing more subtle "additivity prompts" (Koehler, Brenner, & Tversky, 1997) or "extensional cues" (Kahneman & Tversky, 1996), like presenting the complete set of outcomes jointly to the same participants. However, it can be shown that a joint presentation format reduces, but does not eliminate, additivity neglect (Riege & Teigen, 2013).…”