Meet The
Test Set hosts

Michael Chow is Principal Software Architect at Posit and a key contributor to the Python community. He received a Ph.D. in Cognitive Psychology from Princeton University, and is interested in what drives expert data science performance. This led him to build DataCamp Signal, adapative tests of data science skill.

Hadley Wickham is Chief Scientist at Posit, where (among other things) he leads the tidyverse team. He's an author; an adjunct professor of statistics at the University of Auckland, Stanford University, and Rice University; and is renowned for his his vast contributions to the R community.

Wes McKinney is Principal Architect at Posit and an open source software developer focusing on analytical computing. He created the Python pandas project and is a co-creator of Apache Arrow, his current focus. He authored two editions of the reference book, Python for Data Analysis.