In the working and middle class neighborhoods of many Southern cities, you fill find rows of “shotgun” houses. These houses are long and narrow, consisting of three or more rooms in a row. Originally, there would have been no indoor plumbing — they date back to the early 1800s in the U.S. — and, so, no bathroom or kitchen.

Here’s a photograph of a shotgun house I took in the 7th ward of New Orleans. It gives you an idea of just how skinny they are.

In a traditional shotgun house, there are no hallways, just doors that take a person from one room to the next. Here’s my rendition of a shotgun floor plan; doors are usually all in a row:

At nola.com, Richard Campanella describes the possible origins and sociological significance of this housing form. He follows folklorist John Michael Vlach, who has argued that shotgun houses are indigenous to Western and Central Africa, arriving in the American South via Haiti. Campella writes:

Vlach hypothesizes that the 1809 exodus of Haitians to New Orleans after the St. Domingue slave insurrection of 1791 to 1803 brought this vernacular house type to the banks of the Mississippi.

In New Orleans, shotgun houses are found in the parts of town originally settled by free people of color, people who would have identified as Creole, and a variety of immigrants. Outside of New Orleans, we tend to see shotgun houses in places with large black populations.

The house, though, doesn’t just represent a building technique, it tells a story about how families were expected to interact. Shotgun houses offer essentially zero privacy. Everyone has to tromp through everyone’s room to get around the house. There’s no expectation that a child won’t just walk into their parents’ room at literally any time, or vice versa. There’s no way around it.

“According to some theories,” then, Campanella says:

…cultures that produced shotgun houses… tended to be more gregarious, or at least unwilling to sacrifice valuable living space for the purpose of occasional passage.

Cultures that valued privacy, on the other hand, were willing to make this trade-off.

Sure enough, in the part of New Orleans settled by people of Anglo-Saxon descent, shotgun houses are much less common and, instead, homes are more “privacy-conscious.”

Over time, as even New Orleans became more and more culturally Anglo-Saxon — and as the housing form increasingly became associated with poverty — shotguns fell out of favor.  They’re enjoying a renaissance today but, as Campanella notes, many renovations of these historic buildings include a fancy, new hallway.

A comic by Tom Gauld.

In the face of contentious debate about the value of guns, public health professor David Hemenway decided to have the experts weigh in. He modeled his research on the study of climate change experts that produced the familiar statistic that 97% of them believe that humans are causing climate change. He identified 300 scholars who have published about firearms in the fields of public health, public policy, sociology, and criminology. About 100 each have replied to nine surveys asking their opinions about common controversial statements.

Here is your image of the week:

At Mother Jones, Julia Lurie writes: These data “show that a clear majority of experts do not buy the NRA’s arguments.”

Studies of Americans’ unconscious beliefs shows that most people — white and black — think black people are dangerous and both average folks and police are quicker to shoot black than white people.

Where does the cognitive belief that black people are dangerous come from?

Partly, it comes from the media. A new study by Color of Change found that, while 51% of the people arrested for violent crime in New York City are black, 75% of the news reports about such arrests highlighted black alleged perpetrators.

Meanwhile, when people of color are arrested, they are more likely to be portrayed in ways that make them seem threatening than white people. This happened this week:

See also, portrayals of Mark Duggan and Mike Brown.

Each time we see a black person on TV who is linked with a violent crime or portrayed as a criminal, the neurons in our brain that link blackness with criminality fire. The same for people of other races. The more often a link is triggered, the stronger it becomes. Disproportionate reporting like the kind captured in this study make the neural links in our brain — it’s actual physical structure — reflect the racism inherent in the reporting itself.

These associations, unfortunately, are pre-conscious. Those neurons fire faster than we can suppress them with our conscious mind. So, even if we believe in our heart-of-hearts that these connections are unfair or untrue, our unconscious is busy making the associations anyway. Biased reporting, in other words, changes the minds of viewers, literally.

It’s always a treat to find a good candidate for our series on babies-who-totally-learn-how-to-do-things. In previous editions, we’ve featured a baby rapper, baby preacher, baby worshipper, and two babies mimicking a conversation.

These videos are entertaining because they’re babies, but the message their actions send is more than just adorable. They remind us of how deeply cultural we are as human beings.

In this edition, baby gives CPR:

There’s nothing natural about giving CPR. There’s no gene, no evolutionary push for that behavior, no particular brain organization, and no special mix or hormones that can explain why that baby can mimic the steps of cardiopulmonary resuscitation. Instead, that baby is learning.

Learning is coded in our genes. We’re deeply and naturally flexible that way, able to learn whatever our particular culture needs and values. Many people make biologically deterministic arguments — ones that draw a causal arrow from our biology to our behavior — but that’s usually wrong. More often, we are biologically designed to be contingent, our behavior is naturally dependent on whatever it is in the world that we encounter.

While the ’50s is famous for its family-friendly attitude, the number of hours that parents spend engaged in childcare as a primary activity has been rising ever since:

The driving force behind all this focused time is the idea that it’s good for kids. That’s why parents often feel guilty if they can’t find the time or even go so far as to quit their full-time jobs to make more time.

This assumption, however, isn’t bearing out in the science, at least not for mothers’ time. Sociologist Melissa Milkie and two colleagues just published the first longitudinal study of mothers’ time investment and child well-being. They found that the amount of time mothers spent with their children had no significant impact on their children’s academic achievement, incidence of behavioral problems, or emotional health.

Quoted at the Washington Post, Milkie puts it plainly:

I could literally show you 20 charts, and 19 of them would show no relationship between the amount of parents’ time and children’s outcomes… Nada. Zippo.

Benefits for adolescents, they argued, were more nuanced, but still minimal.

These findings suggest that the middle-class intensive mothering trend may be missing its mark. As Brigid Shulte comments at the Washington Post, it’s really the quality, not the quantity that counts. In fact, Milkie and colleagues did find that “family time” — time with both parents while engaged in family activities — was related to some positive outcomes.

The findings also offer evidence that women can work full-time, even the long hours demanded in countries like the U.S., and still be good mothers. Shulte points out that the American Academy of Pediatrics actually encourages parent-free, unstructured time. Moms just don’t need to always be there after all, freeing them up to be people, workers, partners, and whatever else they want to be, too.

The White House has made preventing sexual assaults on college campuses a priority, The Hunting Ground documents extensive institutional denial and malfeasance, the Department of Justice finds that one in five college women are assaulted, research shows that 1 in 25 college men is a serial rapist, and students at almost 100 campuses have filed federal complaints against their schools.

Yet, according to a study of 647 college presidents, only a third (32%) believe that sexual assault is prevalent on college campuses in general and only a tiny minority (6%) think it’s prevalent on their own campus.

This is stunning. Never before in history has the problem of sexual assault on campus been better documented. The media has never covered the issue so thoroughly, frequently, and sympathetically. We are in a moment of national reflection. Under these circumstances, a quarter of college presidents claim that sexual assault isn’t prevalent anywhere and 78% deny that it’s prevalent on their own campus.

These were confidential surveys, so impression management can’t explain these numbers. Those 94% of college presidents who don’t think that sexual crimes are prevalent at their schools either think the numbers are wrong, think their own institutions are exceptions, or think that one in five isn’t fairly described as “prevalent.” Or maybe some combination of the above.

No wonder faculty are frustrated and students around the country have felt forced to turn to the federal government for help. It’s clear. College presidents are either recklessly ignorant or willfully in denial — that, or they simply don’t believe women or don’t care about them.

According to the U.S. Bureau of Labor Statistics, fully employed women earn $0.81 for every dollar men make. Some of this discrepancy is due to women working in male dominated occupations, but when men work alongside women in female-dominated occupations, they still earn more.

Nursing is this week’s example. According to a new study in the Journal of the American Medical Association, male nurses out earn female nurses in every work setting, every clinical setting, and every job position except one.

On average, male nurses make $5,100 more a year than female ones. In the specialty with the biggest discrepancy, nurse anesthetists, they out earned women by $17,290. More at NPR and the New York Times.