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YouTube is the new television, with more than 1.5 billion users, and videos the site recommends have the power to influence viewpoints around the world.

Those recommendations often present divisive, misleading or false content despite changes the site has recently made to highlight more-neutral fare, a Wall Street Journal investigation found.

Behind that growth is an algorithm that creates personalized playlists. YouTube says these recommendations drive more than 70% of its viewing time, making the algorithm among the single biggest deciders of what people watch.

Instagram’s Reels video service is designed to show users streams of short videos on topics the system decides will interest them, such as sports, fashion or humor. 

The Meta Platforms META -1.04%decrease; red down pointing triangle-owned social app does the same thing for users its algorithm decides might have a prurient interest in children, testing by The Wall Street Journal showed.

The Journal sought to determine what Instagram’s Reels algorithm would recommend to test accounts set up to follow only young gymnasts, cheerleaders and other teen and preteen influencers active on the platform.

YouTube wants to recommend things people will like, and the clearest signal of that is whether other people liked them. Pew found that 64 percent of recommendations went to videos with more than a million views. The 50 videos that YouTube recommended most often had been viewed an average of 456 million times each. Popularity begets popularity, at least in the case of users (or bots, as here) that YouTube doesn’t know much about.

So, the challenge becomes how to recommend “new videos that users want to watch” when those videos are new to the system and low in views. (Finding fresh, potentially hot videos is important, YouTube researchers have written, for “propagating viral content.”)

The system learns from a video’s early performance, and if it does well, views can grow rapidly. In one case, a highly recommended kids’ video went from 34,000 views when Pew first encountered it in July to 30 million in August.

Luca Maria Aiello and a few pals from the University of Turin in Italy began studying a social network called aNobii.com in which people exchange information and opinions about the books they love. Each person has a site that anybody can visit. Users can then choose to set up social links with others

To map out the structure of the network, Aiello and co-created an automated crawler that starts by visiting one person’s profile on the network and then all of the people that connect to this node in turn. It then visits each of the people that link to these nodes and so on. In this way, the bot builds up a map of the network

people began to respond to the crawler’s visits. That gave the team an idea. “The unexpected reactions the bot caused by its visits motivated us to set up a social experiment in two parts to answer the question: can an individual with no trust gain popularity and influence?”

In 2014, the American Academy of Pediatrics recommended that middle and high school start no earlier than 8:30 a.m. And just this week, California was the first state to pass into law school start times of no earlier than 8 a.m. for middle schools and 8:30 a.m.

We know that adolescents undergo significant biological changes that impact their circadian rhythm—as a result, their biological clocks shift so that their bodies naturally want to go to sleep later. However, in many communities, these biological shifts are at odds with school schedules which often have younger, elementary school age youth beginning school later, and older, high-school teens beginning school earlier.

As a result of the mismatch between biological changes and earlier school start times, teenagers are often unable to sleep the recommended 8-10 hours per night that is recommended for this age. In fact, national studies show that teenagers are one of the most sleep-deprived groups in the country with only 15 percent getting the recommended hours of sleep.

Videos that could “misinform users in harmful ways,” such as ones that claim the Earth isn’t round or question the actors behind the Sept. 11 terrorist attacks, will no longer be recommended with as much prominence, the Alphabet Inc. GOOGL 1.62% unit said in a blog post Friday.

Though the factors underpinning YouTube’s recommendation system are largely unknown, its influence is apparent in the numbers. YouTube has said its recommendations drive more than 70% of users’ viewing time, and that it recommends more than 200 million videos daily on its home page alone.

Health care

Entertainment and shopping

Today, AI’s main role in healthcare is to help with administrative tasks. Abridge, Nuance DAX, and Nabla Copilot, for example, can capture audio during an appointment and then write up notes for the doctor to review.

All of these public policies have one thing in common: They create winners and losers among members of society. Therefore, an overarching question (on which economists themselves seem unable to agree) is whether economists in their role as social scientists should make recommendations on such issues at all — even if these recommendations are driven by the quest for greater efficiency. In fact, what does efficiency actually mean in economic analysis?

Astute readers will have figured out by now that literally every point falling on the entire solid curve in the graph must be “Pareto optimal” by the economist’s definition of that term, not only those falling on line segment Y-Z. That circumstance makes the economist’s use of the word optimal even more dubious.

Indeed, can it be said that a more efficient resource allocation is better than a less efficient one, given the changes in the distribution of welfare among members of society that these allocations imply?

A POPULAR remedy for a conflict of interest is disclosure — informing the buyer (or the patient, etc.) of the potential bias of the seller (or the doctor, etc.)

disclosure: It often has the opposite of its intended effect, not only increasing bias in advisers but also making advisees more likely to follow biased advice.

But my research has found that people are still more likely to follow this advice because the disclosure creates increased pressure to follow the adviser’s recommendation.

Urban airports like Boston’s Logan thought they had silenced noise issues with quieter planes. Now complaints pour in from suburbs 10 to 15 miles away because new navigation routes have created relentless noise for some homeowners. Photo: Alamy By Scott McCartney Scott McCartney The Wall Street Journal BiographyScott McCartney @MiddleSeat Scott.McCartney@wsj.com March 7, 2018 8:39 a.m. ET 146 COMMENTS saveSB107507240220

It turns out engines aren’t the major culprit anymore. New airplanes are much quieter. It’s the “whoosh” that big airplanes make racing through the air.

Computer models suggest slowing departures by 30 knots—about 35 miles an hour—would reduce noise on the ground significantly.

The coronavirus continues to spread worldwide, with over 200,000 confirmed cases and at least 8,000 dead. In the United States, there have been at least 8,000 cases and more than 100 deaths, according to a New York Times database.

Most important: Do not panic. With a clear head and some simple tips, you can help reduce your risk, prepare your family and do your part to protect others.

That might be hard to follow, especially for those who can’t work from home. Also, if you’re young, your personal risk is most likely low. The majority of those who contract coronavirus do not become seriously ill, and it might just feel as if you have the flu. But keeping a stiff upper lip is not only foolhardy, but will endanger those around you.

The simple act of wearing a mask to protect others during a pandemic is now a political and cultural flashpoint, underscoring the polarization afflicting every corner of American life.

Dr. Anthony Fauci, the nation's top infectious disease expert and a member of the White House coronavirus task force, stood firm in his recommendation that people wear masks, telling CNN's Jim Scuitto Wednesday morning he wears a mask "for people to see that's the kind of thing you should be doing."

A political storm over a piece of cloth appears even more trivial since it comes at a moment when the United States, after one of the world's most mismanaged coronavirus responses, is on the cusp of passing the threshold of 100,000 deaths with the pandemic worsening in 17 states.

When the Centers for Disease Control and Prevention told Americans in January that they didn’t need to wear masks, Dr. S. Vincent Rajkumar, a professor at the Mayo Clinic and the editor of the Blood Cancer Journal, couldn’t believe his ears.

“Here I am, the editor of a journal in a high profile institution, yet I didn’t have the guts to speak out that it just doesn’t make sense,” Dr. Rajkumar told me. “Everybody should be wearing masks.”

Ms. Tufekci, an associate professor at the University of North Carolina’s School of Information and Library Science with no obvious qualifications in epidemiology, came out against the C.D.C. recommendation in a March 1 tweetstorm before expanding on her criticism in a March 17 Op-Ed article for The New York Times.

“Gen Z’s relationship with Instagram is much like millennials’ relationship with Facebook: Begrudgingly necessary,” Casey Lewis, a youth-culture consultant who writes the youth-culture newsletter After School, told me over email. “They don’t want to be on it, but they feel it’s weird if they’re not.”

a recent Piper Sandler survey found that, of 14,500 teens surveyed across 47 states, only 20 percent named Instagram their favorite social-media platform (TikTok came first, followed by Snapchat).

Simply being on Instagram is a very different thing from actively engaging with it. Participating means throwing pictures into a void, which is why it’s become kind of cringe. To do so earnestly suggests a blithe unawareness of your surroundings, like shouting into the phone in public.

A social media account recommended by Elon Musk for its coverage of the Israeli war with Hamas with a long history of antisemitic posts is connected to a southwest London teenager, according to research and a text exchange with the account.

Both accounts were among seven cited a week ago by researchers at the University of Washington as the “new elites” of influence on X, with more than 1.6 billion combined views in the first three days of the war.

“Most of the accounts also use video and images frequently, framed in emotional ways,” researchers wrote. “Strikingly, many of these accounts have received prior promotion from X owner Elon Musk, either through direct recommendation or through Musk’s account replying to their content, which may explain some of their dominance of 'news Twitter.’”

OSLO — “Skam,” a racy, emotionally intense, true-to-life Norwegian web and television series, follows a group of Oslo teenagers as they navigate sex, school, drinking, depression, rape, religion, coming out and the pains of status anxiety, in real life and online.

Each season of “Skam” centers on one character. Season 3, which wraps up next week, has focused on Isak (Tarjei Sandvik Moe), who is coming to terms with being gay and has fallen for an older boy, Even (Henrik Holm).

“‘Skam’ is combining reality and fiction and the line between them isn’t so clear,” said Mari Magnus, 27, the web producer for the show, who writes the text messages and masterminds the Instagram accounts.

Most of the time Google does not actually have the answers. When people say, “I looked it up on Google,” they are committing a solecism. When they try to erase their embarrassing personal histories “on Google,” they are barking up the wrong tree. It is seldom right to say that anything is true “according to Google.” Google is the oracle of redirection. Go there for “hamadryad,” and it points you to Wikipedia. Or the Free Online Dictionary. Or the Official Hamadryad Web Site (it’s a rock band, too, wouldn’t you know). Google defines its mission as “to organize the world’s information,” not to possess it or accumulate it.

Then again, a substantial portion of the world’s printed books have now been copied onto the company’s servers, where they share space with millions of hours of video and detailed multilevel imagery of the entire globe, from satellites and from its squadrons of roving street-level cameras. Not to mention the great and growing trove of information Google possesses regarding the interests and behavior of, approximately, everyone.

When I say Google “possesses” all this information, that’s not the same as owning it. What it means to own information is very much in flux.

meaning” has become the stand-in concept for everything the soul yearns for and seeks. It is one of the few phrases acceptable in modern parlance to describe a fundamentally spiritual need.

what do we mean when we use the word meaning?

as commonly used today, the word is flabby and vacuous, the product of a culture that has grown inarticulate about inner life.

the value of being aware of our ignorance has been a recurring theme in Western thought: René Descartes said it’s necessary to doubt all things to build a solid foundation for science; and Ludwig Wittgenstein, reflecting on the limits of language, said that “the difficulty in philosophy is to say no more than we know.”

Sometimes, when it appears that someone is expressing doubt, what he is really doing is recommending a course of action. For example, if I tell you that I don’t know whether there is milk in the fridge, I’m not exhibiting philosophical wisdom — I’m simply recommending that you check the fridge before you go shopping.

According to NASA, at least 97 percent of actively publishing climate scientists think that “climate-warming trends over the past century are extremely likely caused by human activities.”