Under Formulating Your Brief, Kirk (2019) presented the list of roles or “hats” of data visualization design.  In 2012, the author presented the same topic but with a total of 8 “hats”.  After reading the information from 2012 (his discussion and the slide presentation he includes), compare the information discussed in our text.  Please provide your perspective why there is a change from 2012 to 2019.  This perspective would be your own opinion. This would not be research discovered about the differences from another source.  Please include the following:

1. What are the similarities and the differences in these two lists of roles?

2. Why do you think the list has been refined to the list presented in 2019?

3. What is your suggestion for the next revision and why?