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Posts Tagged ‘perception

“For she had eyes and chose me”*…




Psychologist David Perrett’s… Perception Lab recruited 300 men and 400 women, all of whom had heterosexual partners and had been raised by two parents. They learned that romantic partners tend to look alike — the participants and their partners tended to have similar hair color and similar eye color.

This might be explained by a self-similar preference or narcissism, but on looking deeper into the data Perrett’s team found that the single best predictor of one’s partner’s eye color was the eye color of one’s parent of the opposite sex. If a woman’s mother had blue eyes and her father had brown eyes, she would most likely be partnered with a brown-eyed man. If a man’s mother had blue eyes and his father had brown eyes, his partner most likely had blue eyes. Similarly, the hair color of a man’s mother was the single best predictor of his partner’s hair color. “These results indicate that individuals choose partners who resemble their opposite-sex parent both in eye and hair color.”…

The mysteries of human attraction: “Eye to Eye.”

Read the underlying paper: Anthony C. Little et al., “Investigating an Imprinting-Like Phenomenon in Humans: Partners and Opposite-Sex Parents Have Similar Hair and Eye Colour,” Evolution and Human Behavior 24:1 [2003], 43-51.

* William Shakespeare, Othello


As we peer through the window to the soul, we might spare a thought for playwright, poet, artist, biologist, theoretical physicist, and philosopher Johann Wolfgang von Goethe; he died on this date in 1832.  Probably best remembered these days for Faust, he was “the master spirit of the German people,” and, after Napoleon, the leading figure of his age.

In 1810, Goethe published his Theory of Colors (Zur Farbenlehre), which he considered his most important work.  In it, he contentiously (and incorrectly) characterized color as arising from “the dynamic interplay of light and darkness through the mediation of a turbid medium.”  Still, Goethe was the first systematically to study the physiological effects of color; his observations of the effect of opposed colors led him to a symmetric arrangement of his color wheel, “for the colors diametrically opposed to each other… are those which reciprocally evoke each other in the eye.”  Indeed, after being translated into English by Charles Eastlake in 1840, his theory became widely adopted by the art world, most notably by J. M. W. Turner.



Written by LW

March 22, 2020 at 1:01 am

“Time flies like an arrow; fruit flies like a banana”*…




How does now unstick itself and become the past, and when does the future morph into the present? How do these states transition, one into another, so seamlessly?

How long is right now ?…

[Fascinating explorations of different explanations…]

Each theory of right now has one thing in common: It challenges the notion that the present is reliable and objective, or that it stretches out infinitely in front of us, even if we sometimes perceive it that way. This is an important reminder because the way we think about time affects the kinds of decisions we make.

We don’t just think about the past, present, or future, we think about ourselves in those places. (That’s the impetus behind something called Time Perspective Theory, which argues that there are six different ways people regard time, and it greatly influences your perspective on life.)

Studies have found that many people think about themselves in the future not as themselves, but as other people. When asked to imagine a birthday in the far off future, people are more likely to envision it from a third-person viewpoint. When we think about ourselves in 10 years, compared to right now, it activates similar parts of our brain that think about others, not ourselves.

Our instinct to place a lot of emphasis on the present, said Hal Hershfield, a psychologist at UCLA who has studied how perceptions of time relate to the choices people make. But if we could better relate to our future selves, we could be better off later on. Hershfield and his collaborators did a study that found that those who felt more similar to their future selves made more future-oriented decisions and had higher levels of well-being across a decade…

How long is right now?  As long as it took you to read that question?  Or shorter?  Or it might not exist at all…

* Anthony G. Oettinger


As we remember Ram Dass, we might recall that it was on this date in 1914 that Henry Ford announced that his company would cut its workday from nine hours to eight, and double workers’ wages to $5 per day.

Cited as the beginning of the “living wage” revolution, it is often suggested that Ford made the move so that his employees could afford the product that they were making.  But many historians argue that the real motivations were likelier an attempt to reduce employee turnover and to put economic pressure on competitors.  In any event, that’s what happened:  while Ford’s move was hugely unpopular among other automakers, they saw the increase in Ford’s productivity– and a significant increase in profit margin (from $30 million to $60 million in two years)– and (mostly) followed suit.


Assembly line at the Ford Motor Company’s Highland Park plant, ca. 1913



Written by LW

January 5, 2020 at 1:01 am

“Above all else show the data”*…


With the hope that your celebrations will be warm and peaceful, and with thanks for your kind attention over the last twelve months, (Roughly) Daily is going on it’s annual Holiday hiatus…  So here, to tide us over, The Economist Graphics Unit’s wonderful “2017 Daily chart advent calendar” (the first installment of which, above)– a collection of 25 of the years best infographics, each with a short accompanying essay.

See you in the New Year!

* Edward Tufte


As we revel in new ways of seeing, we might send terrifyingly (and at the same time, amusingly) insightful birthday greetings to Edwin Abbott; he was born on this date in 1838.  A schoolmaster and theologian, Abbott is best remembered as the author of the remarkable novella Flatland: A Romance of Many Dimensions (1884). Writing pseudonymously as “A Square,” Abbott used the fictional two-dimensional world of Flatland to offer pointedly-satirical observations on the social hierarchy of Victorian culture. But the work has survived– and inspired legions of mathematicians and science fiction writers– by virtue of its fresh and accessible examination of dimensionality.  Indeed, Flatland was largely ignored on its original publication; but it was re-discovered after Einstein’s General Theory of Relativity– which posits a fourth dimension– was introduced; in a 1920 letter to Nature, Abbott is called a prophet for his intuition of the importance of time to explain certain phenomena.



Written by LW

December 20, 2017 at 1:01 am

“And above all, watch with glittering eyes the whole world around you because the greatest secrets are always hidden in the most unlikely places”*…


The visual system’s tendency to fill in the invisible parts of the objects we see before us can be exploited to create a wide range of compelling magical illusions: spoons bending, knives cutting through flesh, and solid rings magically linking and unlinking. The principle underlying all these tricks, as well as many others, is that the visual system convinces you that something is there, whereas in fact there is just a gap or a missing piece.

But our visual system doesn’t just fill in the gaps. It can also create a compelling impression that the space hidden behind an object in the foreground is empty. In most situations, this impression is correct, but in some cases, it is illusory and misleading. To magicians, this perceptually empty space is the perfect hiding place for the things they don’t want you to know about. It is a no-brainer that hiding things behind something else makes them invisible, but the illusion of perceptually empty space entails more than just invisibility: it makes you ‘see’ that that there’s nothing there, although there sometimes is – particularly when you are watching a magician at work.

The philosopher Jason Leddington at Bucknell University in Pennsylvania says the experience of magic results from a failure of imagination. Our failure to figure out what the magician does results from the fact that we are unable to imagine it. This view neatly captures the essence of the illusion of empty space: it makes it difficult for us to even imagine that there is anything hidden behind the object in the foreground – be it the magician’s thumb, hand or anything else…

What magic can teach us about what we do– and don’t– perceive: “Now you see it, now you…

* Roald Dahl


As we confirm that there’s nothing up our sleeves, we might recall that it was this date in 1693 that is traditionally ascribed to Benedictine friar Dom Pérignon’s invention of Champagne.

In fact, the the good father didn’t actually invent sparkling wine:  The oldest recorded sparkling wine is Blanquette de Limoux, which was apparently invented by a different bunch of Benedictines in the Abbey of Saint Hilaire near Carcassonne in 1531.  Then, over a century later, the English scientist and physician Christopher Merret documented the addition of sugar to a finished wine to create a second fermentation– six years before Dom Perignon set foot in the Abbey of Hautvillers (where he did, in fact, make several improvements to the process of making bubbly) and almost 40 years before it was claimed that the famed Benedictine monk invented Champagne.  Merret presented the Royal Society with a paper in which he detailed what is now called “méthode champenoise” in 1662.

Still, today’s a good day to raise a glass in thanks.

Statue of Dom Pérignon at Moët et Chandon



Written by LW

August 5, 2017 at 1:01 am

“When you have mastered numbers, you will in fact no longer be reading numbers, any more than you read words when reading books. You will be reading meanings.”*…

Errors of judgment about large numbers can have a big impact on the way you view policies and government decisions. The rationale goes like this: The National Science Foundation received $7.463 billion for fiscal year 2016 through the Consolidated Appropriations Act. The total United States budget outlay for 2016 was $3.54 trillion. If you’re someone who perceives the difference between a billion and a trillion as relatively small, you’d think the US is spending a lot of money on the National Science Foundation—in fact, depending on your politics, you might applaud the federal government’s investment or even think it wasteful. But, if you understand that a billion is a thousand times less than a trillion, you can calculate that the Foundation got a paltry 0.2 percent of the budget outlay last year. (It may be more straightforward to think of the budget as roughly one-half to one-third of reported costs for the proposed US-Mexico border wall, and let your values guide you from there.)…

On the significance of scale: “How to Understand Extreme Numbers.

[The image above is, of course, from the ever-wonderful xkcd.]

* W.E.B. Du Bois


As we nudge ourselves toward numeracy, we might spare a thought for Sewall Wright; he died on this date in 1988.  A geneticist, he was known for his influential work on evolutionary theory and also for his work on path analysis. He was a founder (with Ronald Fisher and J.B.S. Haldane) of population genetics– a major step in the development of the modern evolutionary synthesis combining genetics with evolution.   He is perhaps best remembered for his concept of genetic drift (called the Sewall Wright effect): when small populations of a species are isolated, the few individuals who carry certain relatively rare genes may fail, out of pure chance, to transmit them. The genes may therefore disappear and their loss may lead to the emergence of new species– although natural selection has played no part in the process.



Written by LW

March 3, 2017 at 1:01 am

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