Assignment 2: The Questions to ProPublica and The Exercise Demo

My questions are: 

1. Have the ProPublica done some user studies and evaluations about how each ways of data visualizations would effect the readers reading experince differently?

2. If the answer to the first questions is no, then how do they choose how to visulize the data? It is by emperiacal experience or based on the results of some exsiting research?

I have done some 3D data visualiztion in AR with Unity and Vuforia.

The below is the video. You can jump to 2:05 to skip my introduction about the data set and to directly see my demo.