Why Effort Increases Value: The Neuroscience of Dopamine & Acetylcholine

Have you ever paid a premium for a product or service, or waited hours in line to obtain it, only to feel it was worth the cost? It’s not simply a feeling – your brain actually changes how it perceives the value of what you get. What once seemed like a simple psychological quirk has, in fact, a very concrete biological basis.

The Biological Basis of Perceived Value

Neuroscientists at Stanford Medicine in the United States published an article in the science journal Nature analyzing why paying more or waiting in line to buy an item increases its value in our minds.

For reasons previously unknown, we are programmed to value something more if we’ve invested significant effort into obtaining it.

Did You Know? Researchers defined “cost” as the number of times mice had to touch their noses to a hole in a box—ranging from one to almost 50 times—or the risk of receiving mild electric shocks to obtain a reward.

Dopamine’s Role in Desire and Satisfaction

“We make flawed decisions based on what we’ve invested in something, even if the probability of obtaining an objective advantage is nil,” explains Neir Eshel, an adjunct professor of psychiatry and behavioral sciences at Stanford Medicine, as reported by EuropaPress.

“And it doesn’t just happen to us. This has been demonstrated in animals throughout the animal kingdom,” he adds.

The key player is dopamine, a brain chemical that drives us to “do it again, do it more,” and is well-known for its connection to pleasure, learning, and habit formation.

Eshel clarifies there’s a distinction between wanting something and liking it, focusing on how the brain motivates behavior. “You can desire something immensely, even if you don’t like it very much. Or vice versa.”

Effort and Reward are Intertwined

Several years ago, Eshel, his then-postdoctoral advisor Dr. Rob Malenka, a professor of Psychiatry and Behavioral Sciences, and collaborators at Stanford Medicine began experiments to understand the difference between desire and enjoyment, and the role of dopamine secretion in the brain in each state.

“We observed how much an animal likes something (how much it will consume if that something is free) and how much it desires something (to what extent the animal’s consumption is affected by the cost of obtaining it),” Eshel explains.

The results of this experimentation were published on November 27th in ‘Neuron’.

The study revealed a potential neuronal mechanism for the psychological observation that we value rewards more when we work harder to obtain them: the release of dopamine in the striatum is strongly influenced by the effort expended to get a reward.

Expert Insight: The findings suggest that our brains don’t necessarily assess value based on objective worth, but rather on the investment—both in terms of effort and potential discomfort—required to acquire something. This has implications for understanding consumer behavior and decision-making processes.

Acetylcholine: The Link Between Effort and Value

The researchers discovered that another brain chemical, acetylcholine, is crucial for linking the amount of dopamine released upon receiving a reward with the effort required to obtain it.

They found that increased effort results in greater production of acetylcholine from nearby nerve cells, which in turn increases the amount of dopamine released by dopamine-secreting nerve cells after a reward is received.

The greater the prior effort to obtain the reward, the greater the satisfaction experienced upon obtaining it, and the greater the value attributed to it.

This discovery helps explain why our purchasing or effort-related decisions often don’t follow economic logic, and explains behaviors ranging from waiting in long lines to paying premium prices. Our brain literally adjusts the perception of value based on what we invest, a mechanism combining dopamine, acetylcholine, and habit learning.

Frequently Asked Questions

What is the striatum and why is it important in this research?

The striatum is a structure located in the center of the brain known for its role in motivation and movement. It contains an abundance of dopamine receptors and is connected to brain regions that secrete dopamine. It’s also involved in learning, habit formation, and addiction.

How did researchers measure “liking” versus “wanting” in the study?

Researchers measured “liking” by observing how much a rat would consume of a reward when it was freely available. They measured “wanting” by observing how much the rat’s consumption was affected by the cost of obtaining the reward.

What role does acetylcholine play in the process?

Acetylcholine links the amount of dopamine released when a reward is received with the effort needed to get it. Increased effort leads to more acetylcholine production, which then boosts dopamine release, increasing the perceived value of the reward.

Considering these findings, how might understanding the brain’s reward system influence your own decision-making processes?