The tasks (called items in the study) are the first 6 histogram and all 6 case-value plot tasks (hence, the first 12 tasks from the data in dataset 1_Raw_Data_Students). It contains all data needed for reproducing the results described in the qualitative article belonging to this dataset, including for example, codebook, coding of transcripts, RStudio file for calculating accuracy and precision. Also detailed coding results, including second coder results. Note that the raw data of this project as well as the design of the project, materials and so on are in the dataset: 1_Raw_Data_Students. The latter dataset is needed for replicating the whole eye-tracking study.