Best-Ever Algorithm Found for Huge Streams of Data

Kevin Hartnett
Wired Magazine
Originally published October 29, 2017

Here is an excerpt:

Computer programs that perform these kinds of on-the-go calculations are called streaming algorithms. Because data comes at them continuously, and in such volume, they try to record the essence of what they’ve seen while strategically forgetting the rest. For more than 30 years computer scientists have worked to build a better streaming algorithm. Last fall a team of researchers invented one that is just about perfect.

“We developed a new algorithm that is simultaneously the best” on every performance dimension, said Jelani Nelson, a computer scientist at Harvard University and a co-author of the work with Kasper Green Larsen of Aarhus University in Denmark, Huy Nguyen of Northeastern University and Mikkel Thorup of the University of Copenhagen.

This best-in-class streaming algorithm works by remembering just enough of what it’s seen to tell you what it’s seen most frequently. It suggests that compromises that seemed intrinsic to the analysis of streaming data are not actually necessary. It also points the way forward to a new era of strategic forgetting.

The article is here.

Why we pretend to know things, explained by a cognitive scientist

Sean Illing
Vox.com
Originally posted November 3, 2017

Why do people pretend to know things? Why does confidence so often scale with ignorance? Steven Sloman, a professor of cognitive science at Brown University, has some compelling answers to these questions.

“We're biased to preserve our sense of rightness,” he told me, “and we have to be.”

The author of The Knowledge Illusion: Why We Never Think Alone, Sloman’s research focuses on judgment, decision-making, and reasoning. He’s especially interested in what’s called “the illusion of explanatory depth.” This is how cognitive scientists refer to our tendency to overestimate our understanding of how the world works.

We do this, Sloman says, because of our reliance on other minds.

“The decisions we make, the attitudes we form, the judgments we make, depend very much on what other people are thinking,” he said.

If the people around us are wrong about something, there’s a good chance we will be too. Proximity to truth compounds in the same way.

In this interview, Sloman and I talk about the problem of unjustified belief. I ask him about the political implications of his research, and if he thinks the rise of “fake news” and “alternative facts” has amplified our cognitive biases.

The interview/article is here.

Rigorous Study Finds Antidepressants Worsen Long-Term Outcomes

Peter Simons
madinamerica.com
Originally posted

Here is an excerpt:

These results add to a body of research that indicates that antidepressants worsen long-term outcomes. In an article published in 1994, the psychiatrist Giovanni Fava wrote that “Psychotropic drugs actually worsen, at least in some cases, the progression of the illness which they are supposed to treat.” In a 2003 article, he wrote: “A statistical trend suggested that the longer the drug treatment, the higher the likelihood of relapse.”

Previous research has also found that antidepressants are no more effective than placebo for mild-to-moderate depression, and other studies have questioned whether such medications are effective even for severe depression. Concerns have also been raised about the health risks of taking antidepressants—such as a recent study which found that taking antidepressants increases one’s risk of death by 33% (see MIA report).

In fact, studies have demonstrated that as many as 85% of people recover spontaneously from depression. In a recent example, researchers found that only 35% of people who experienced depression had a second episode within 15 years. That means that 65% of people who have a bout of depression are likely never to experience it again.

Critics of previous findings have argued that it is not fair to compare those receiving antidepressants with those who do not. They argue that initial depression severity confounds the results—those with more severe symptoms may be more likely to be treated with antidepressants. Thus, according to some researchers, even if antidepressants worked as well as psychotherapy or receiving no treatment, those treated with antidepressants would still show worse outcomes—because they had more severe symptoms in the first place.

The article is here.

The target article is here.

For some evangelicals, a choice between Moore and morality

Marc Fisher
The Washington Post
Originally posted November 16, 2017

Here is an excerpt:

What’s happening in the churches of Alabama — a state where half the residents consider themselves evangelical Christians, double the national average, according to a Pew Research study — is nothing less than a battle for the meaning of evangelism, some church leaders say. It is a titanic struggle between those who believe there must be one clear, unalterable moral standard and those who argue that to win the war for the nation’s soul, Christians must accept morally flawed leaders.

Evangelicals are not alone in shifting their view of the role moral character should play in choosing political leaders. Between 2011 and last year, the percentage of Americans who say politicians who commit immoral acts in their private lives can still behave ethically in public office jumped to 61 percent from 44 percent, according to a Public Religion Research Institute/Brookings poll. During the same period, the shift among evangelicals was even more dramatic, moving from to 72 percent from 30 percent, the survey found.

“What you’re seeing here is rank hypocrisy,” said John Fea, an evangelical Christian who teaches history at Messiah College in Mechanicsburg, Pa. “These are evangelicals who have decided that the way to win the culture is now uncoupled from character. Their goal is the same as it was 30 years ago, to restore America to its Christian roots, but the political playbook has changed.

The article is here.

And yes, I live in Mechanicsburg, PA, by I don't know John Fea.

Differential inter-subject correlation of brain activity when kinship is a variable in moral dilemma

Mareike Bacha-Trams, Enrico Glerean, Robin Dunbar, Juha M. Lahnakoski, and others
Scientific Reports 7, Article number: 14244

Abstract

Previous behavioural studies have shown that humans act more altruistically towards kin. Whether and how knowledge of genetic relatedness translates into differential neurocognitive evaluation of observed social interactions has remained an open question. Here, we investigated how the human brain is engaged when viewing a moral dilemma between genetic vs. non-genetic sisters. During functional magnetic resonance imaging, a movie was shown, depicting refusal of organ donation between two sisters, with subjects guided to believe the sisters were related either genetically or by adoption. Although 90% of the subjects self-reported that genetic relationship was not relevant, their brain activity told a different story. Comparing correlations of brain activity across all subject pairs between the two viewing conditions, we found significantly stronger inter-subject correlations in insula, cingulate, medial and lateral prefrontal, superior temporal, and superior parietal cortices, when the subjects believed that the sisters were genetically related. Cognitive functions previously associated with these areas include moral and emotional conflict regulation, decision making, and mentalizing, suggesting more similar engagement of such functions when observing refusal of altruism from a genetic sister. Our results show that mere knowledge of a genetic relationship between interacting persons robustly modulates social cognition of the perceiver.

The article is here.

Going with your gut may mean harsher moral judgments

Jeff Sossamon
www.futurity.org
Originally posted November 2, 2017

Going with your intuition could make you judge others’ moral transgressions more harshly and keep you from changing your mind, even after considering all the facts, a new study suggests.

The findings show that people who strongly rely on intuition automatically condemn actions they perceive to be morally wrong, even if there is no actual harm.

In psychology, intuition, or “gut instinct,” is defined as the ability to understand something immediately, without the need for reasoning.

“It is now widely acknowledged that intuitive processing influences moral judgment,” says Sarah Ward, a doctoral candidate in social and personality psychology at the University of Missouri.

“We thought people who were more likely to trust their intuition would be more likely to condemn things that are shocking, whereas people who don’t rely on gut feelings would not condemn these same actions as strongly,” Ward says.

Ward and Laura King, professor of psychological sciences, had study participants read through a series of scenarios and judge whether the action was wrong, such as an individual giving a gift to a partner that had previously been purchased for an ex.

The article is here.

The Illusion of Moral Superiority

Ben M. Tappin and Ryan T. McKay
Social Psychological and Personality Science
Volume: 8 issue: 6, page(s): 623-631

Issue published: August 1, 2017 

Abstract

Most people strongly believe they are just, virtuous, and moral; yet regard the average person as distinctly less so. This invites accusations of irrationality in moral judgment and perception—but direct evidence of irrationality is absent. Here, we quantify this irrationality and compare it against the irrationality in other domains of positive self-evaluation. Participants (N = 270) judged themselves and the average person on traits reflecting the core dimensions of social perception: morality, agency, and sociability. Adapting new methods, we reveal that virtually all individuals irrationally inflated their moral qualities, and the absolute and relative magnitude of this irrationality was greater than that in the other domains of positive self-evaluation. Inconsistent with prevailing theories of overly positive self-belief, irrational moral superiority was not associated with self-esteem. Taken together, these findings suggest that moral superiority is a uniquely strong and prevalent form of “positive illusion,” but the underlying function remains unknown.

The article is here.

Is There a Right Way to Nudge? The Practice and Ethics of Choice Architecture

Evan Selinger and Kyle Whyte
Sociology Compass, Vol. 5, No. 10, pp. 923-935

Abstract

What exactly is a nudge, and how do nudges differ from alternative ways of modifying people's behavior, such as fines or penalties (e.g. taxing smokers) and increasing access to information (e.g. calorie counts on restaurant menus)? We open Section 2 by defining the concept of a nudge and move on to present some examples of nudges. Though there is certainly a clear concept of what a nudge is, there is some confusion when people design and talk about nudges in practice. In Sections 3 and 4, then, we discuss policies and technologies that get called nudges mistakenly as well as borderline cases where it is unclear whether people are being nudged. Understanding mistaken nudges and borderline cases allows citizens to consider critically whether they should support “alleged” nudge policies proposed by governments, corporations, and non-profit organizations. There are also important concerns about the ethics of nudging people's behavior. In Section 5 we review some major ethical and political issues surrounding nudges, covering both public anxieties and more formal scholarly criticisms. If nudges are to be justified as an acceptable form of behavior modification in democratic societies, nudge advocates must have reasons that allay anxieties and ethical concerns. However, in Section 6, we argue that nudge advocates must confront a particularly challenging problem. A strong justification of nudging, especially for pluralistic democracies, must show that nudge designers really understand how different people re-interpret the meaning of situations after a nudge has been introduced into the situations. We call this the problem of “semantic variance.” This problem, along with the ethical issues we discussed, makes us question whether nudges are truly viable mechanisms for improving people's lives and societies. Perhaps excitement over their potential of nudges is exaggerated.

The article is here.

Moral Hard-Wiring and Moral Enhancement

Introduction

In a series of papers (Persson & Savulescu 2008; 2010; 2011a; 2012a; 2013; 2014a) and book (Persson & Savulescu 2012b), we have argued that there is an urgent need to pursue research into the possibility of moral enhancement by biomedical means – e.g. by pharmaceuticals, non-invasive brain stimulation, genetic modification or other means directly modifying biology. The present time brings existential threats which human moral psychology, with its cognitive and moral limitations and biases, is unfit to address.  Exponentially increasing, widely accessible technological advance and rapid globalisation create threats of intentional misuse (e.g. biological or nuclear terrorism) and global collective action problems, such as the economic inequality between developed and developing countries and anthropogenic climate change, which human psychology is not set up to address. We have hypothesized that these limitations are the result of the evolutionary function of morality being to maximize the fitness of small cooperative groups competing for resources. Because these limitations of human moral psychology pose significant obstacles to coping with the current moral mega-problems, we argued that biomedical modification of human moral psychology may be necessary.  We have not argued that biomedical moral enhancement would be a single “magic
bullet” but rather that it could play a role in a comprehensive approach which also features cultural and social measures.

The paper is here.