Two Guys on Your Head

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December 7, 2023

Sugar and The Brain (Rebroadcast)

By: Rebecca McInroy

Why is it hard to have just one of those delicious slices of pound cake over the holidays? Well, it turns out it has less to do with the creamy butter and more to do with the way our brains react to those sweet white grains of sugar.

In this edition of Two Guys on Your HeadDr. Art Markman and Dr. Bob Duke discuss the ways our brains respond to sugar by releasing dopamine. While we may think this dopamine is supposed to make us feel good, what the chemicals in our brains are trying to do is to teach us that this sugar is a good thing and that we want more of it for our survival. This might have been beneficial to us 150,000 years ago, but with sweets in every candy dish, gas station, and coffee shop, craving sugar has its consequences.


Episodes

October 17, 2025

Bad Luck, Superstitions, and Safety Behaviors

When it comes to luck, we often focus on the good kind, but what about bad luck, superstition, and the strange rituals we turn to for comfort and control? On this episode of Two Guys on Your Head, Dr. Art Markman, Dr. Bob Duke, and Rebecca McInroy talk about how these beliefs and behaviors can […]

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October 10, 2025

Luck

Chance may favor the prepared mind, but if you’re only looking for a lucky break, you may miss out on something much more important. In this episode of Two Guys on Your Head, Dr. Art Markman, Dr. Bob Duke, and Rebecca McInroy talk about the psychology of luck.

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October 3, 2025

The Weighted Vest: an update on popularity

Popularity shapes our choices every day, but in today’s world, what we perceive as “popular” is often steered by algorithms, targeted ads, push notifications, and the constant pull of social media; forces we may not fully recognize. In this episode of Two Guys on Your Head, Dr. Art Markman, Dr. Bob Duke, and Rebecca McInroy […]

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September 26, 2025

The Psychology of Popularity

We often assume our choices reflect personal taste: selecting the “best” products, enjoying the movies we “want” to see, and listening to the music we believe is “good.” Yet underlying these decisions is the powerful influence of popularity. It doesn’t just affect what we buy—it informs how we evaluate ideas, people, and beliefs. In this […]

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September 19, 2025

How We Determine Value (Rebroadcast)

Humans may take the card we swipe for granted at the grocery store when we buy food, or look at our bank balance and not even think of how unique it is that we can translate those little numbers into experiences and things. It’s merely one of the benefits of having big brains. In this […]

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September 12, 2025

Mental Health in the Media Storm

Every day we’re surrounded by a flood of negative headlines, and it can take a real toll on our mental health. In this episode of Two Guys on Your Head, Dr. Art Markman, Dr. Bob Duke, and Rebecca McInroy share practical ways to protect your well-being and stay mentally strong in the midst of all […]

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September 5, 2025

The Psychology of Personal Resistance

To resist or not to resist? That is the question. And the answer is—shocker to no one—it depends. But what it depends on matters a lot. In this episode of Two Guys on Your Head, Dr. Art Markman, Dr. Bob Duke, and Rebecca McInroy explore the fine line between resistance as healthy self-preservation versus resistance […]

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August 29, 2025

The Weather and Social Media Use

We spend an increasing proportion of our time online, and, given the importance of social media to human welfare, the external factors that shape online behavior are important to consider. In this episode of Two Guys on Your Head, Dr. Art Markman, Dr. Bob Duke, and Rebecca McInroy explore social media use and the weather. […]

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