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AI systems intended to help people make tough choices — like prescribing the right drug or setting the length of a prison sentence — can instead end up effectively making those choices for them, thanks to human faith in machines.

How it works: These programs generally offer new information or a few options meant to help a human decision-maker choose more wisely. But an overworked or overly trusting person can fall into a rubber-stamping role, unquestioningly following algorithmic advice.

Why it matters: Over-reliance on potentially faulty AI can harm the people whose lives are shaped by critical decisions about employment, health care, legal proceedings and more.

The big picture: This phenomenon is called automation bias. Early studies focused on autopilot for airplanes — but as automation technology becomes more complex, the problem could get much worse with more dangerous consequences.

  • AI carries an aura of legitimacy and accuracy, burnished by overeager marketing departments and underinformed users.
  • But AI is just fancy math. Like any equation, if you give it incorrect inputs, it will return wrong answers. And if it learns patterns that don't reflect the real world, its output will be equally flawed.

Automation bias caused by simpler technologies has already been blamed for real-world disasters.

  • In 2016, a patient was prescribed the wrong medication when a pharmacist chose a similarly named drug from a list on a computer. A nurse noticed — but administered the meds anyway, assuming the electronic record was correct. The patient had heart and blood pressure problems as a result.
  • In 2010, a pipeline dumped nearly 1 million gallons of crude oil into Michigan wetlands and rivers after operators repeatedly ignored "critical alarms." They were desensitized because of previous false alarms, according to a 2016 post-mortem report — showing another threat from over-reliance on machines.

"When people have to make decisions in relatively short timeframes, with little information — this is when people will tend to just trust whatever the algorithm gives them," says Ryan Kennedy, a University of Houston professor who researches trust and automation.

  • "The worst-case scenario is somebody taking these algorithmic recommendations, not understanding them, and putting us in a life or death situation," Kennedy tells Axios.

Now, institutions are pushing AI systems further into high-stakes decisions.

  • In hospitals: A forthcoming study found that Stanford physicians "followed the advice of [an AI] model even when it was pretty clearly wrong in some cases," says Matthew Lungren, a study author and the associate director of the university's Center for Artificial Intelligence in Medicine and Imaging.
  • At war: Weapons are increasingly automated, but usually still require human approval before they shoot to kill. In a 2004 paper, Missy Cummings, now the director of Duke University's Humans and Autonomy Lab, wrote that automated aids for aviation or defense "can cause new errors in the operation of a system if not designed with human cognitive limitations in mind."
  • On the road: Sophisticated driver assists like Tesla's Autopilot still require people to intervene in dangerous situations. But a 2015 Duke study found that humans lose focus when they're just monitoring a car rather than driving it.

And in the courtroom, human prejudice mixes in.

What's next: More information about an algorithm's confidence level can give people clues for how much they should lean on it. Lungren says the Stanford physicians made fewer mistakes when they were given a recommendation and an accuracy estimate.

  • In the future, machines may adjust to a user's behavior — say, by showing its work when a person is trusting its advice too much, or by backing off if the user seems tried or stressed, which can make them less critical.
  • "Humans are good at seeing nuance in a situation that automation can't," says Neera Jain, a Purdue professor who studies human–machine interaction. "[We are] trying to avoid those situations where we become so over-reliant that we forget we have our own brains that are powerful and sophisticated."

Go deeper

Return-to-work plans on ice after COVID spike

Illustration: Sarah Grillo/Axios

Even more "back-to-office" callbacks are being postponed amid a surge in COVID-19 infections.

Why it matters: It feels like March 13, 2020, all over again. When businesses sent all their workers home, it was an early big hint the pandemic was going to upend our lives.

How the Delta variant ups the stakes in the war against COVID

Illustration: Shoshana Gordon/Axios

The dominant Delta variant's ability to efficiently infect people and rapidly grow inside a person is enabling the coronavirus to regain its footing in the United States.

Why it matters: "The solution is right in front of us — get everybody vaccinated and we wouldn't even be talking about this," NIAID director Anthony Fauci tells Axios.

Apple debuts plan to detect images of child sexual abuse

Illustration: Aïda Amer/Axios

Apple announced new iPhone features Thursday that it said would enable the detection and reporting of illegal images of child sexual abuse while preserving users' privacy.

Driving the news: One new system will use cryptographic hashes to identify illegal images that users are uploading to Apple's iCloud without Apple directly snooping in users' troves of photos, which can be encrypted.

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