In this episode of the Research Bites Podcast, Dr. Kristina Spaulding talks with Dr. Lars Schwabe about what happens to learning and memory when the brain is under stress—and why those changes matter for behavior, training, and mental health.

They begin by unpacking how memory works in the first place, walking through the stages of encoding, consolidation, and retrieval. From there, they explore the still-debated idea of reconsolidation—the possibility that when memories are retrieved, they may briefly become modifiable. Dr. Schwabe discusses the evidence behind this concept, along with early attempts to reduce the emotional intensity of memories in conditions such as addiction and PTSD.

The conversation then turns to the physiology of stress. Dr. Schwabe explains how acute stress activates the sympathetic nervous system and the HPA axis, releasing cortisol and reshaping how the brain prioritizes information. Under these conditions, the amygdala tends to amplify emotionally salient details. As a result, stress can strengthen central aspects of emotional and threat-related learning while weakening contextual information and working memory.

These shifts have important behavioral consequences. When stress is high, certain types of learning becomes stronger—one possible pathway to fear generalization. Dr. Schwabe also discusses how stress can change the type of behavior we rely on. Goal-directed behavior—associated with the prefrontal cortex—allows flexible updating based on outcomes. Habitual behavior, more closely tied to other brain areas, is faster but less flexible. Under stress, the balance can shift toward habits and away from flexible decision-making.

Throughout the conversation, Dr. Spaulding and Dr. Schwabe explore what these findings might mean for animal training, resilience, learned helplessness, and the treatment of stress-related disorders. They also emphasize an important reality of scientific work: translating laboratory findings into real-world practice is complex, and individual differences play a major role in how stress affects learning and beha

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In this episode of the Research Bites Podcast, I’m joined by my first return guest, Patricia McConnell — Certified Applied Animal Behaviorist, beloved author, and former professor at University of Wisconsin–Madison. Many of you know her from The Other End of the Leash and For the Love of a Dog, books that shaped an entire generation of trainers.

But today, we’re talking about something new.

Her debut mystery novel, Away to Me, follows Maddie McGowan — an dog behaviorist living on a small Wisconsin farm — whose world is upended when violence strikes close to home. What unfolds is both a gripping mystery and an accurate portrayal of life as a behavior professional: working with complex clients, navigating canine aggression and trauma, and building partnerships with clients.

In our conversation, we explore:

• What fiction allows us to say about dogs that nonfiction sometimes cannot
• How to write emotional truth without overstepping scientific evidence
• Why sheepdog trials are the perfect dramatic backdrop for exploring partnership and agency
• The role of trauma, resilience, and healing — for both people and dogs
• Why agency, play, and learning to read canine body language are so important for supporting out dogs

Patricia speaks candidly about walking the line between evidence and intuition, about what dogs teach us when we truly listen, and about the power of story to expand how the public understands behavior work.

If you love a good mystery, or just a good book, especially one where the dogs are written accurately—this episode is for you.

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

• Website: https://sciencemattersllc.com/
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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!

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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.

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In this episode of the Research Bites Podcast, Dr. Kristina Spaulding talks with Dr. (Jessica) Perry Hekman, DVM, PhD — behavioral geneticist and co-founder of the Functional Dog Collaborative — about what genetics can (and can’t) tell us about dog behavior.

Dr. Hekman shares her journey from veterinary practice to genetics research and helps unpack key concepts like heritability, epigenetics, and behavioral phenotypes. Together, they explore what the science really says about breed and behavior — including a thoughtful look at the much-debated 2022 Darwin’s Ark study.

The conversation takes a nuanced look at some of the biggest questions in our field: What does “breed” actually mean? How much variation exists within breeds? And how do genes and environment interact to shape the dogs we live and work with? While these questions don’t yet have clear, concrete answers, Dr. Hekman helps shed light on what current research can tell us — and where science is still evolving.

Dr. Hekman also discusses the goals of the Functional Dog Collaborative, which promotes evidence-based breeding practices that support genetic diversity, health, and sound temperament. The discussion concludes with a look at how trainers and behavior professionals can contribute to a more informed, ethical approach to breeding and behavior.

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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