How Other People's Beliefs Program You
A man picks up the phone to talk to a woman he’s never met. Before the call, researchers show him a photo. An attractive woman, he thinks that’s who he’s about to speak with.
It’s not. The photo is random. The woman on the other end looks nothing like it.
But something happens during the call. He’s warmer, more engaged, funnier. And the woman, who knows nothing about any photo, starts responding differently. She becomes more engaging, more likeable, more attractive in her behavior. Independent judges who only heard her side of the conversation confirmed it.¹
His false belief changed his behavior, which changed her behavior, which created a social reality that was entirely manufactured by an expectation that had no basis in fact. The interaction felt real to both of them. The connection felt real. None of it would have existed without a lie.
Now multiply this by every interaction you’ve ever had. Every conversation, every relationship, every first impression. Your expectations about other people change how you treat them, which changes how they respond, which confirms what you already believed. And everyone is doing this to you at the same time.
The social world you live in is not a fixed landscape you’re reacting to. It’s a system you’re co-creating with everyone around you, and most people have no idea they’re doing it.
This is the second part of the series on how belief systems program you. The first part covered how your own beliefs control you from the inside. This one is about the external pathway: how other people’s beliefs shape your reality, and how yours shape theirs.
The self-fulfilling prophecy
A sociologist named Robert Merton described this mechanism in 1948. He called it the self-fulfilling prophecy.²
His example: a perfectly healthy bank, nothing wrong with it. Someone starts a rumor that it’s failing. Depositors hear the rumor and rush to withdraw their money. The bank runs out of cash. The bank actually fails. The false belief caused the reality it predicted. And the person who started the rumor points at the wreckage and says “I knew it,” never realizing they caused it.
Merton showed this playing out with racism too. White unionists excluded Black workers, claiming they were strikebreakers. The exclusion forced Black workers to take the only work available to them, which was strikebreaking. Which “confirmed” the original prejudice. The prophecy manufactured its own evidence.
This mechanism runs everywhere, all the time, in every relationship and interaction you have. Someone forms a belief about you. That belief changes how they treat you. Their treatment changes your behavior. Your changed behavior confirms their original belief. And the cycle continues, getting stronger with each pass.
The teachers were programming
Researchers tested this directly in a classroom. They gave every student in a school a standard IQ test but told the teachers it was a special test designed to identify students who were about to experience dramatic intellectual growth. Then they handed teachers a list of “intellectual bloomers,” students who would supposedly surge that year.
The lists were completely random. The “bloomers” were chosen by coin flip.
Eight months later, the designated bloomers showed significantly higher IQ gains than the other students. First and second graders in the experimental group gained 27 and 16 IQ points respectively, compared to 12 and 7 for everyone else.³
The students didn’t change. The teachers’ belief about them changed. And that belief altered the teachers’ behavior in four ways they weren’t even aware of: they created a warmer emotional tone with those students, gave them harder material, gave them more chances to answer questions and more time to respond, and provided more detailed feedback on both right and wrong answers.
The teachers thought they were just teaching. They were programming.
Every authority figure you’ve ever had, every parent, teacher, boss, coach, was running this mechanism on you. Their expectations of you changed how they treated you, which changed how you developed, which confirmed their expectations. If they expected you to succeed, they invested more and you were more likely to succeed. If they expected you to struggle, they invested less and you were more likely to struggle.
The programming happens through channels nobody is monitoring. And none of it needs to be malicious or deliberate to be effective.
One sentence is enough
Researchers gave fifth graders a problem set. All the kids did well. Then they randomly split them and gave one group a single sentence of praise: “you must be smart.” The other group got: “you must have worked hard.”
Then they gave everyone a harder test. Everyone failed. Then they went back to easy problems.
The kids who were told they were smart chose easy tasks afterwards (67% of them), declined 20% in performance on the easy problems, and 40% of them lied about their scores on anonymous forms. The kids who were told they worked hard chose harder challenges (92% of them) and maintained their performance.⁴
One sentence from someone in authority. That’s all it took to install a completely different operating system for how a child handles difficulty. “You’re smart” created kids who avoided challenge and lied to protect their image. “You worked hard” created kids who sought challenge and persisted through failure.
Think about how many sentences like this you absorbed growing up. From parents, teachers, coaches, peers. Every one of them was a small piece of code being written into your belief system. Most of it was never examined, never questioned, never chosen. It just accumulated.
Culture as the biased teacher
The same mechanism operates at the level of entire groups and cultures. Researchers took Black and white Stanford students matched on SAT scores and gave them the same difficult verbal test. When the test was described as measuring intellectual ability, the Black students significantly underperformed. When the exact same test was described as just a problem-solving exercise, the gap disappeared.⁵
Same students. Same ability. Same test. The only thing that changed was whether the framing activated a culturally installed belief. The students weren’t less capable. A belief that society had been programming into them for their entire lives was enough to suppress their performance the moment the context made it relevant.
This is the Golem Effect operating at scale. In the first article I talked about how individuals become their own Golem, generating low expectations internally after absorbing them from outside. Here the source is clearer: the entire culture is the biased teacher, communicating low expectations through a million subtle channels, and the targets absorb those expectations and perform accordingly.
The social world around you is a belief-manufacturing system. It’s running on you right now. The question is whether you’re going to keep absorbing whatever programming your environment hands you, or whether you’re going to start choosing it deliberately.
But enough with the theory, let’s dive into the practical steps of how to use this to your advantage: