Fig. 3
From: Developing and evaluating a pollination systems knowledge assessment in a multidisciplinary course
Item difficulty and discrimination values for the PSKA, in Spring 2019. Each triangle represents an item; these are ordered based on their difficulty and discrimination values. For item difficulty, lower values indicate a lower proportion of correct answers (i.e., a difficult question). For item discrimination, higher values indicate that the top-third of students outperformed the bottom-third of students