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The earliest sign of addiction may not be denial, but a gap between lived experiences and current actions.

The decision-making disconnect could represent a marker of preaddiction before full addiction develops.

Treatment may depend less on teaching facts and risks and more on helping people apply what they already know.

Is preaddiction real? If so, what is it?

Preaddiction proposes that some addiction-related changes emerge before full substance use disorder develops—and before consequences become severe. Like prediabetes or prehypertension, it suggests a potentially modifiable risk state where earlier intervention may prevent progression to addiction.

Historically, addiction has often been viewed as a progression from experimentation to misuse and finally dependence. Implicit in many models is the idea that severe addiction occurs because people, overwhelmed by reward, deny or become oblivious to consequences.

A recent study from Yale University suggests something much more complex. Using computational models of decision-making, Sonia Ruiz and colleagues found that people with more extensive substance use histories were still capable of learning and recognizing which actions would lead to better outcomes. However, they were less consistent, almost random, in applying what they already knew.

Knowledge remained intact—but its influence on drug use and behavior became less reliable.

Even after making successful choices, they were less likely to repeat advantageous behavior. Participants increasingly shifted toward immediate results, habits, and context-driven responding. Decisions also became more variable and unpredictable.

This distinction matters. These data show addiction may not primarily reflect failure to understand consequences. Instead, addiction may involve impaired translation of knowledge into action. It is also a failure to change current behavior based on already acquired or newly acquired learning.

“I know this is hurting me.”

“I am destroying my family “

“I know I should stop.”

“I know what I need to do.”

Yet changing their behavior does not follow these insights.

Repeated substance exposure may weaken brain systems involved in integrating prior experience, evaluating delayed outcomes, maintaining goals, and converting intention into action. The result is not a lack of knowledge, but reduced dependability in using that knowledge.

Knowledge Alone Is Not Protective

Evidence for this idea is everywhere,........

© Psychology Today