This free webinar presented by CQL | The Council on Quality and Leadership, explains what reliability means statistically, including how it differs from validity. We address how CQL attends to reliability, and who is considered to be a certified/reliable interviewer. Finally, there is a tutorial showing how organizations can explore the reliability of their data in CQL’s PORTAL Data System.

In This Webinar

  • The statistical basis for the term reliability
  • Differences between reliability and validity
  • What reliability means to CQL and its partners
  • Information about CQL Certification
  • Brief overview of CQL’s PORTAL Data System
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Carli Friedman, Ph.D.

CQL Director of Research


Carli Friedman, Ph.D., oversees all CQL data analyses and research projects, along with providing consultation about quality enhancement. Carli’s research examines quality of life, community integration, social determinants of health, and ableism.


Carli Friedman, Ph.D.