“…Unfortunately, educational professionals often lack the necessary skills and knowledge to effectively interpret data (Hellrung & Hartig, 2013;Hopster-den Otter et al, 2017), as they struggle with comprehending statistical measures and/or visualizations of those measures. In order to determine how SPF can be optimally tailored to educational professionals' data literacy, more insight is needed into actual user interpretations of pupil achievement data (O'Leary et al, 2017;Shivraj & Ketterlin-Geller, 2019;van der Kleij, Eggen, & Engelen, 2014). SPF reports and dashboards are "the primary interface between test developers and […] educational stakeholders" (Gotch & Roduta Roberts, 2018, p. 46) and the way they present information is instrumental in determining whether SPF users will be capable of arriving at valid interpretations.…”