143: The Power of One: Single System Design with Bruce Thyer, PhD, LCSW

Episode 143: In today's episode, I spoke with Dr. Bruce Thyer, is Distinguished Research Professor and former Dean with the College of Social Work at Florida State University about Single System Design. We start our conversation diving into why social workers should know about single system design, its core components, and the kinds of measures and assessments that work best and where to find them. We discuss real-world examples, the nuances of designs like AB, ABC, and beyond, and how to use single subject designs for complicated, multilayered problems. I wanted to know if they work across levels of practice—micro, mezzo, and macro—and whether they’re appropriate for evaluating evidence-based practice. When I told Bruce I had concerns about the generalizability of SSDs, he reminded me that the requirements for generalizability are almost never met, even in rigorous large scale studies. We ended with a discussion about publishing single system designs. Today's episode is the first of a two-part series on social work research. Part 2, Episode 144, is a discussion with Dr. Thyer about experimental design. You can read a transcript of today's interview at You can connect with other social workers at the Social Work Podcast Facebook page at or follow the Bluesky feed at

You can listen to 143: The Power of One: Single System Design with Bruce Thyer, PhD, LCSW online on Radio and Podcast. Open the player on this page to stream the available audio.

143: The Power of One: Single System Design with Bruce Thyer, PhD, LCSW is an episode from The Social Work Podcast by Jonathan B. Singer, Ph.D., LCSW.

This episode is 33:13 long.

This episode was published on Jan 13, 2025.

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