Data Displays
The Data Display construct outlines the progression of students’ perceptions of data, particularly the ways they might think about constructing or interpreting a display (e.g., graph) as a means of better understanding the phenomenon in question.
This construct describes a shift from a case-specific to an aggregate perspective of the data display. The highest level describes an integration of both perspectives. The milestones are keyed to displays of a single variable, but the general progression from reading cases toward reading aggregates is important to most forms of display.
Levels
1 Create or interpret data displays without relating to the goals of the inquiry.
2 Interpret and/or produce data displays as collections of individual cases.
3 Notice or construct groups of similar values.
4 Recognize or apply scale properties to the data.
5 Consider the data in aggregate when interpreting or creating displays.
6 Integrate case with aggregate perspectives.