Today’s episode is a little different from the usual format.

What you’re hearing is an actual recording from a Research Bites Coffee Break—an informal, unscripted conversation where behavior professionals think out loud about research, ask questions, and explore ideas together. There’s no lecture and no tidy conclusions—just real discussion and curiosity in action.

The topic for this Coffee Break was the distinction between wanting and liking, two concepts that are often treated as interchangeable in training and behavior work, but that turn out to be meaningfully different. Liking refers to how much pleasure an animal experiences from a reinforcer. Wanting reflects motivation—the willingness to work for that reinforcer, sometimes described as something closer to craving.

In this conversation, we explore how wanting and liking interact, why one can be present without the other, and what that means for learning, reinforcement, and behavior change. We also talk about how these ideas can help us think more carefully about motivation in practice, especially when training isn’t going the way we expect.

If you’re interested in how scientific concepts evolve when people slow down, question assumptions, and apply them to real animals and real situations, this episode offers a candid look at that process.

A huge thank you to the Research Bites members who attended this podcast: Juliet Purll, Faith Cleary, Mason Small, Suzanne Bryner, Chrysann Collatos, Lynne Stott, Lori Torrini, Karen Scott, Kristine Adams, Wendy Katz, Shannon Noonan, Paula Philips, Heather Furby, Alice Hengst, Kiem Sie.

For more information, please check out my website and social media links below!

• Website: https://sciencemattersllc.com/
• Unlocking Resilience: https://sciencemattersllc.com/unlocking-resilience
• Research Bites: https://sciencemattersllc.com/research-bites
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One of the most common questions Dr. Kristina Spaulding hears is whether stress “stays in the system” for three days. In this episode, she digs into what that really means, what the research shows, and why the truth is more complex than a simple yes or no.

She begins with the biology of the stress response—how the HPA axis and sympathetic nervous system work together, the roles of cortisol and corticosterone, and why not all stress is bad. Then she takes on the central question: how long does stress actually last? You’ll learn how long it typically takes for stress hormones to peak and return to baseline, and the many factors that influence recovery, making exact estimates of the duration of the stress response extremely difficult.

Dr. Spaulding also explores sensitization and cross-sensitization—how prior stress can make animals more reactive to future challenges, even entirely different ones. This has big implications for understanding anxiety, PTSD, and the impacts of stress on behavior. Finally, she discusses chronic and developmental stress and why a blunted stress response doesn’t necessarily mean an animal is “fine.”

The idea that stress lingers for three days is a myth. Hormones often normalize within hours, but the effects of stress—especially repeated or early-life stress—can last for days, weeks, or even a lifetime.

Resources:

Garcia, Arantxa, Octavi Marti, Astrid Valles, Silvina Dal-Zotto, and Antonio Armario. “Recovery of the Hypothalamic-Pituitary-Adrenal Response to Stress: Effect of Stress Intensity, Stress Duration and Prevention Stress Exposure.” Neuroendocrinology 72, no. 2 (August 2000): 114–25.

Belda, X., Rotllant, D., Fuentes, S., Delgado, R., Nadal, R., & Armario, A. (2008). Exposure to severe stressors causes long‐lasting dysregulation of resting and stress‐induced activation of the hypothalamic‐pituitary‐adrenal axis. Annals of the New York Academy of Sciences, 1148(1), 165-173.

For more information, please check out my website and social media links below!

• Website: https://sciencemattersllc.com/
• Unlocking Resilience: https://sciencemattersllc.com/unlocking-resilience
• Research Bites: https://sciencemattersllc.com/research-bites
• Join the Science Matters newsletter
• Facebook
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In this episode, Dr. Kristina Spaulding dives into the complex world of labels—how we define, categorize, and talk about behavior in both humans and animals. Drawing on her psychology background, she explores the benefits and pitfalls of labels, the messiness behind mental health classifications, and how new models in psychology might help us think differently about animal behavior. At the heart of the discussion: lasting change comes from addressing underlying processes—like stress, emotional regulation, and impulsivity—rather than focusing only on behaviors. If you’ve ever wondered how labels shape your work—or how to use them more effectively—this is an episode you won’t want to miss.

Whether you’re a trainer, behavior consultant, vet, or science-curious animal lover, you’ll come away with a richer, more nuanced view of how labels shape our understanding—and results.

Links & Resources:
Unlocking Resilience: https://sciencemattersllc.com/unlocking-resilience

First, M. B., Rebello, T. J., Keeley, J. W., Bhargava, R., Dai, Y., Kulygina, M., ... & Reed, G. M. (2018). Do mental health professionals use diagnostic classifications the way we think they do? A global survey. World Psychiatry, 17(2), 187-195.

Maj, M. (2018). Why the clinical utility of diagnostic categories in psychiatry is intrinsically limited and how we can use new approaches to complement them. World Psychiatry, 17(2), 121–122. https://doi.org/10.1002/wps.20512

Nasrallah, H. A. (2021). Re-Inventing the Dsm as A Transdiagnostic Model: Psychiatric Disorders Are Extensively Interconnected. Annals of Clinical Psychiatry, 33(3), 148–150. https://doi.org/10.12788/acp.0037

For more information, please check out my website and social media links below!

• Website: https://sciencemattersllc.com/
• Unlocking Resilience: https://sciencemattersllc.com/unlocking-resilience
• Research Bites: https://sciencemattersllc.com/research-bites
• Join the Science Matters newsletter
• Facebook
• ...