The Attention Economy: How Smartphones Were Engineered to Be Addictive, Who Designed the Systems, and What They’ve Said About It Since

I want to start with a quote because it is the one that stopped me cold when I first read it, and I think it sets up everything that follows better than any framing I could write.

“Behind every screen on your phone, there are generally a thousand engineers that have worked to try to make it maximally addicting.”

That is Aza Raskin, who invented the infinite scroll. He said it about the industry he helped build. He also said he feels deeply guilty about what he created. He has testified against Meta in court. He now works at the Center for Humane Technology, which exists specifically to undo some of the damage.

Here is the thing about the attention economy: nobody is really disputing the basic facts anymore. The people who built these systems have been saying, publicly and on the record, that they engineered addiction into the product. The question at this point is not whether it happened. The question is what we do about it.

What Was Actually Designed

The infinite scroll is probably the most consequential single design decision in social media history. Before Raskin introduced it around 2006, social media had page breaks. You got to the bottom of a page and had to actively click to see more. That click was a stopping cue. Your brain had a moment to register: do I want to continue?

The infinite scroll removed that moment. Content loads continuously as you scroll. There is no bottom. As Raskin later described it: “your brain does not have a chance to catch up with your impulses.” He compared what social media companies did with his invention to “sprinkling behavioral cocaine over your interface.” He made that comparison himself. The person who created the feature made the cocaine comparison.

Pull-to-refresh is another one. Loren Brichter, the former Twitter engineer who created it, later told The Guardian: “Pull-to-refresh is addictive. Twitter is addictive. These are not good things.” The mechanism works like a slot machine lever. You pull down, you wait, you get a reward. The variable reward schedule, the uncertainty of what you are going to get, is one of the most powerful behavioral hooks known to psychology. Brichter designed it into the interface. He subsequently said he regretted it.

The notification badges on apps are red for a reason. Red signals urgency. It signals threat, or at least importance, at a neurological level that predates smartphones by evolutionary time. Someone made a deliberate decision to make notification badges red because conditioning people to associate red badges with something requiring immediate attention keeps them checking their phones. James Williams, who built key parts of Google’s advertising business, later described these systems as privileging “our impulses over our intentions.”

What the People Who Built Facebook Said About It

Sean Parker, the founding president of Facebook, gave a particularly memorable account in 2017. He described Facebook’s founding logic as explicitly about consuming as much user time and attention as possible. He said the company was “exploiting a vulnerability in human psychology.” He framed the like button as a dopamine hit that creates a social validation feedback loop. He said: “God only knows what it’s doing to our children’s brains.”

Parker said this in 2017. Facebook launched in 2004. He helped build it. Chamath Palihapitiya, who was Facebook’s VP of user growth, said in the same year: “The short-term dopamine-driven feedback loops that we have created are destroying how society works.” He added that he felt “tremendous guilt” about what he had done. He said he largely avoided the products himself and that his children were not allowed to use them.

Justin Rosenstein, one of the engineers who co-created the Facebook Like button, described social approval as a kind of addiction. He subsequently put restrictions on his own phone to limit his social media use. Leah Pearlman, another Like button co-creator, hired a social media manager to handle her accounts because she could not trust herself around them.

What the Science Shows

The behavioral hooks in these products are not accidental. They draw directly from behavioral psychology research, specifically from the work of B.F. Skinner on variable reward schedules. Skinner showed that the most powerful way to reinforce a behavior is to make the reward unpredictable. Not every pull of the lever gets a reward. Some pulls get nothing, some get a small reward, occasional pulls get a large one. That unpredictability is what creates compulsive behavior in animals and in people.

Slot machines use this. Social media feeds use this. The algorithm that determines what you see when you scroll through Instagram or TikTok is specifically optimized to serve you variable rewards: some content is fine, some is engaging, occasionally something is extraordinary. You keep scrolling because you do not know when the extraordinary content is coming. Your brain is trained to keep looking.

Professor Daniel Kruger of the University of Michigan has noted that the methods social media companies use activate the same brain mechanisms as cocaine, in terms of the dopamine response pattern. Raskin made the cocaine comparison. Kruger confirmed the neuroscience.

In 2025, juries in Los Angeles and Santa Fe found Meta and Google negligent for designing apps to be addictive and harmful to children’s mental health. Both companies said they disagreed with the verdicts and planned to appeal. The legal reckoning, in other words, is underway. It is not finished.