“…This kind of non-theoretical grounding (Riezler 2014) could help to break circularity by evaluating, for instance, whether naive annotators perceive diagram elements to form visual groups (grouping) or whether arrows and lines are considered to signal connections between individual diagram elements or visual groups (connectivity). For discourse structure annotation, Yung et al (2019) introduce a multi-step procedure for sourcing descriptions of discourse relations [-0.23, -0.45, -0.31, -0.44, -0.15, -0.04, -0.25, 2.46, -0.11, -0.47, -0.23, 3.65, 1.76, 1.42, 1.58, 1.24, -0.83, -0.67, 2.26, -0.25, 1.15, -0.44, 1.83, -0.33, 0.73, -0.34, -0.25, -0.21, -0.16, -0.1 , -0.13, -0.13, -0.07, -0.12, -0.1 , -0.07, -0.04, -0.03, -0.03, -0.03, -0.03, 1.53, 1.72, -0.61, 2.3, -0.05] 6 Exploring the AI2D-RST corpus…”