“…• Detailed described studies as the data term level of the third layer in Figure 4 (e.g., "click", "scroll", "text changed", "notification time", "accelerometer", "gyro", "battery level"): [23,24,34,33,25,31,20,21,17,30,28,27,102,87,103,104,18,22,36,121,68,66,73,79,82,83,80,49,57] • Vaguely described studies as the data term level of the first or second layer in Figure 4 (e.g., "all UI events", "sensors", "sensor data", "event type", "user actions", "gesture action", "context events", "context logs"): [35,16,32,140,29,127,72,76] Furthermore, depending on the method of describing the data terms, there can be a difference in the degree of ease in terms of reproducibility for other researchers. The method of describing data terms in 110 number of papers can be divided into two types of studies: First type of studies are described by words or words with categorization, second type of studies are described by words in sentences.…”