Research Interests

My IA and UX textbook, published in Spring 2017 - Information Architecture: The Design and Integration of Information Spaces, 2nd Edition (2017).

Chronic disease patients' online information behavior journey, diabetics and their progression from novice to expert

Articles and Presentations

A model for including theories from the persuasion research domain in medical search research and design.

Presenting usability testing research results at Google

A graph of image posting, and reposting across the web and social media, through the lens of Pinterest pins and pinboards.

Peer Reviewed Articles

Exploratory Search and Health Informatics
Social Media and Information Science


Students have worked at Oracle, Twitter, McKinsey & Company, Etsy, IBM, Library of Congress and more.

  • Professor, Drexel University: Information Architecture - Grad level UX course
  • Professor, Drexel University: Digital Libraries - Grad level information science and metadata course
  • Professor, Drexel Universityr: Digital Library Technologies - Grad level programming, design, and metadata course
  • Thesis Lead, Master of Design at The University of the Arts: The Hack-Charrette: Designing a Model for Engaging Teams in Tech Innovation
  • Instructor, Bryn Mawr College: Summer Multimedia Development Intership- Undergrad summer interships in web-design and programming

Student Feedback:

  • It was your classes that got me really interested in the digital aspect of libraries and that's what led me to this [Library of Congress] internship. I couldn't have gotten this without my Drexel education so I thank you for that!
  • "I took your IA class at Drexel last winter. I loved the class so much that I decided to change careers and go into UX! In fact, I have my first interview for a UX Researcher job coming up next week"
  • "This was a very valuable course... really made me stretch my mind. I will definitely use what I learned in the future. This may turn out to be the course I got the most out of, long term."
  • "Even though it's been challenging, this has been my favorite class"
  • "Great course and Professor Zarro really made it come to life with his enthusiasm."

Invited Presentations

  • Agile UX: Dogma vs. Diversity (2016). AgilePhilly Panelist
  • It's All Sales: Selling and Defending UX (2015). ACM PhillyCHI workshop series
  • A Conceptual Model of Online Information Behavior in the Chronic Disease Trajectory (2013). World Usability Day
  • Introduction to Social Networking Sites (2012). Guest lecture, Social Aspects Of Info Systems @ Drexel University
  • User Experience Research: Is There an Academic – Practitioner Divide (2012; with Mike Carvin). ACM SIGCHI, Philadelphia Chapter (PhillyCHI)
  • Prototyping (2011). Guest lecture, Human Computer Interaction 1 @ Drexel University
  • Education Wants to be Free (2009; with Dave Cooksey). Philadelphia Mayor's Commission on Literacy
  • Information Architecture for Educators and Students (2008; with Dave Cooksey). Philadelphia Mayor's Commission on Literacy
  • Distance Education: An Insiders Perspective (2007). Philadelphia Mayor's Commission on Literacy
  • Don't Make Me Think, I'm Here to Learn (2007). Philadelphia Area Educational Technology Conference