Flashback Friday: Parrot ‘Laughter’ is Contagious

By Seriously Science | June 22, 2018 6:00 am

 

(Credit: Chris Greig Photography/Shutterstock)

(Credit: Chris Greig Photography/Shutterstock)

Instead of parroting the author’s own words (below), we will leave you with a video showing the contagious laughter-like vocalization of Kea parrots. We hope it doesn’t ruffle any feathers.

Positive emotional contagion in a New Zealand parrot.

“Positive emotional contagions are outwardly emotive actions that spread from one individual to another, such as glee in preschool children or laughter in humans of all ages. Read More

Study shows that wearing a “fatsuit” makes women snack harder.

By Seriously Science | June 21, 2018 11:36 am

Overeating is a growing problem. But what makes us overeat? Obviously, delicious food can be hard to resist, but that’s clearly not the only factor. Here, scientists explored whether feeling overweight changes how we eat. It turns out that wearing a suit designed to make one feel obese did change participants’ eating habits — but only for women. Women, but not men, ate more snack food when wearing the fatsuits, even in private. The scientists were not able to determine why this was true, but it’s true.

The psychosocial experience of feeling overweight promotes increased snack food consumption in women but not men.

“Self-identification of being overweight has been associated with overeating and weight gain in observational studies, irrespective of whether the individual in question is objectively overweight. The aims of the present studies were to examine whether experimentally manipulating the psychosocial experience of feeling overweight impacted on snack food consumption and to identify mechanisms explaining this effect. In Study 1, to manipulate the psychosocial experience of feeling overweight, 120 women wore an obese body suit or control clothing in public or private settings, before consuming snack foods. Read More

CATEGORIZED UNDER: eat me, feelings shmeelings

Flashback Friday: Bumblebees detect electric fields with their body hair.

By Seriously Science | June 15, 2018 6:00 am
Photo: flickr/Bert Heymans

Photo: flickr/Bert Heymans

We’ve already covered some of the amazing things that bees can do, from making perfectly hexagonal honeycombs to doing “the wave” to scare off predators. And it turns out they even have the power to detect electric fields! Although it was known that bees can detect electric fields around flowers, how they achieve this amazing feat was a mystery… until now! According to these scientists, bees are actually covered with small hairs that respond to electricity. Be sure to check out the video below to see the hairs in action!

Mechanosensory hairs in bumblebees (Bombus terrestris) detect weak electric fields

“Electroreception in terrestrial animals is poorly understood. In bumblebees, the mechanical response of filiform hairs in the presence of electric fields provides key evidence for electrosensitivity to ecologically relevant electric fields. Mechanosensory hairs in arthropods have been shown to function as fluid flow or sound particle velocity receivers. The present work provides direct evidence for additional, nonexclusive functionality involving electrical Coulomb-force coupling between distant charged objects and mechanosensory hairs. Read More

CATEGORIZED UNDER: fun with animals

Tinder Users Don’t Have More Casual Sex

By Seriously Science | June 13, 2018 3:20 pm
Photo: wikimedia commons/Santeri Viinamäki

(Credit: Wikimedia Commons/Santeri Viinamäki)

Are certain types of people more likely to use Tinder? These researchers set out to determine which characteristics differentiate people who use “picture-based dating apps” (aka Tinder) from those who don’t. By surveying over 600 Norwegian university students, they found a few obvious things — like men were more likely than women to emphasize “desire for sex” as a reason for using dating apps. But they also found some surprising things, like no evidence that people who used the apps actually had more casual sex partners. Swipe right on this study!

Individual differences in sociosexuality predict picture-based mobile dating app use

“This study investigates individual differences, sex differences and predictors of current and prior use of Picture-Based Mobile Dating Apps (PBMDA), including level and type of PBMDA activity, and reasons for PBMDA use. Six hundred and forty-one Norwegian university students aged between 19 and 29 years completed a questionnaire in lecture breaks. Nearly half of the participants reported former or current PBMDA use. One in five was current users. Read More

MORE ABOUT: sex & reproduction

Flashback Friday: Does wearing tighty whities kill your sperm count?

By Seriously Science | June 8, 2018 11:00 am

Boxers versus briefs: it’s a personal question that might have big consequences for your future. That’s because warming up your testicles can seriously screw up sperm development–so seriously, in fact, that polyester ball cozies have been shown to be an effective form of birth control. So if briefs are (literally) hotter than boxers, they may reduce your fertility. But before you go burn your briefs, check out the study below. These scientists actually tested the testicular temperatures of men wearing both styles of nut huts, and they found that there was no significant difference. Don’t just rely on our brief (!) summary, though–go read the paper for yourself!

Are boxer shorts really better? A critical analysis of the role of underwear type in male subfertility.

“PURPOSE: Elevation of testicular temperature may result in arrest of spermatogenesis, abnormal semen parameters and sterility. It has been proposed that brief style underwear may produce scrotal hyperthermia and lead to clinical subfertility. Although this idea is regarded as dogma by many in the lay community and the changing of underwear type is a therapy frequently recommended by medical practitioners, there is a paucity of data measuring scrotal temperature as a function of underwear type.

MATERIALS AND METHODS: Scrotal, core and skin temperatures were measured in 97 consecutive men presenting for evaluation of primary clinical subfertility. These cases were categorized by underwear type to boxer or brief group. Read More

Think your political views are the best? You’re probably misinformed

By Seriously Science | June 7, 2018 11:20 pm

We all know them: those people with strong political convictions who, when you disagree, tell you it’s because you don’t know what you are talking about. But do they really know more than you do? Here, scientists tested the relationship between feeling that one’s own political beliefs are superior and how much one actually knows about the topic. It turns out that the two are inversely related–meaning the more strongly people think their belief is superior, the more likely it is that they actually lack information. But all hope is not lost! When convinced that their beliefs may not be as great as they thought, participants tended to lower their confidence in their knowledge. Let’s all just keep that in mind come midterm elections.

Is belief superiority justified by superior knowledge?

“Individuals expressing belief superiority—the belief that one’s views are superior to other viewpoints—perceive themselves as better informed about that topic, but no research has verified whether this perception is justified. The present research examined whether people expressing belief superiority on four political issues demonstrated superior knowledge or superior knowledge-seeking behavior. Read More

CATEGORIZED UNDER: told you so

Flashback Friday: Why Do Some Birds Lay Blue Eggs?

By Seriously Science | June 1, 2018 6:00 am
(Credit: Brandon Blinkenberg/Shutterstock)

(Credit: Brandon Blinkenberg/Shutterstock)

While you might be most familiar with “robin’s egg blue”, many species of birds lay blue-colored eggs. Why might this have evolved? Although scientists can’t go back in time to observe the emergence of blue eggs, they can think carefully about which properties might be most different between blue and non-blue eggs–which is what these researchers did! They found that blue eggs absorb just the right amount of light to warm the egg, but not allow it to get too hot. Egg-cellent!

Shedding Light on Bird Egg Color: Pigment as Parasol and the Dark Car Effect.

“The vibrant colors of many birds’ eggs, particularly those that are blue to blue-green, are extraordinary in that they are striking traits present in hundreds of species that have nevertheless eluded evolutionary functional explanation. We propose that egg pigmentation mediates a trade-off between two routes by which solar radiation can harm bird embryos: transmittance through the eggshell and overheating through absorbance. Read More

CATEGORIZED UNDER: fun with animals

Your eyebrows could reveal how narcissistic you are

By Seriously Science | May 31, 2018 4:51 am
Photo: Wikimedia/Eva Rinaldi

Photo: Wikimedia/Eva Rinaldi

Identifying a narcissist is a handy skill, and these scientists have made it a bit easier by finding that the key to pinpointing a narcissist is… their eyebrows? That’s right, apparently the “distinctiveness” of someone’s eyebrows (for example, how thick or dense they are) is the main cue that they are suffering from “grandiose narcissism”. And speaking of distinctive eyebrows…

Eyebrows Cue Grandiose Narcissism.

“OBJECTIVE:
Though initially charming and inviting, narcissists often engage in negative interpersonal behaviors. Identifying and avoiding narcissists therefore carries adaptive value. Whereas past research has found that people can judge others’ grandiose narcissism from their appearance (including their faces), the cues supporting these judgments require further elucidation. Here, we investigated which facial features underlie perceptions of grandiose narcissism and how they convey that information.

METHOD AND RESULTS:
In Study 1, we explored the face’s features using a variety of manipulations, ultimately finding that accurate judgments of grandiose narcissism particularly depend on a person’s eyebrows. In Studies 2A-2C, we identified eyebrow distinctiveness (e.g., thickness, density) as the primary characteristic supporting these judgments. Finally, we confirmed the eyebrows’ importance in Studies 3A and 3B by measuring how much perceptions of narcissism changed when swapping narcissists’ and non-narcissists’ eyebrows between faces.

CONCLUSIONS:
Together, these data show that distinctive eyebrows reveal narcissists’ personality to others, providing a basic understanding of the mechanism through which people can identify narcissistic personality traits with potential application to daily life.”

Related content:
Powerful narcissists (ahem) tend towards overconfidence.
Being angry makes a woman look more like a man.
People prefer mates with a 22% resemblance to themselves.

Flashback Friday: Which state Googles “porn” the most? The answer might surprise you

By Seriously Science | May 25, 2018 6:00 am
Photo: flickr/Caden Crawford

Photo: flickr/Caden Crawford

Google Trends has become a productive source of data for social scientists, particularly those interested in when and where people search for the word “porn”. First, they discovered that porn searches peaked in winter and early summer, a result that lead them to believe that there actually is a human mating season. Now, they’ve looked at the results by state, and found some more interesting patterns.

Perhaps not surprisingly, “higher percentages of Evangelical Protestants, theists, and biblical literalists in a state predict higher frequencies of searching for porn, as do higher church attendance rates.” The state with the highest search rate? You guessed it: Mississippi, followed closely by Texas. The authors conclude that “more salient, traditional religious influences in a state may influence residents–whether religious or not–toward more covert sexual experiences.”

 Unbuckling the Bible Belt: A State-Level Analysis of Religious Factors and Google Searches for Porn.

“While the link between individual religious characteristics and pornography consumption is well established, relatively little research has considered how the wider religious context may influence pornography use. Exceptions in the literature to date have relied on relatively broad, subjective measures of religious commitment, largely ignoring issues of religious belonging, belief, or practice. This study moves the conversation forward by examining how a variety of state-level religious factors predict Google searches for the term porn, net of relevant sociodemographic and ideological controls. Our multivariate findings indicate that higher percentages of Evangelical Protestants, theists, and biblical literalists in a state predict higher frequencies of searching for porn, as do higher church attendance rates. Conversely, higher percentages of religiously unaffiliated persons in a state predict lower frequencies of searching for porn.

Higher percentages of total religious adherents, Catholics, or mainline Protestants in a state are unrelated to searching for porn with controls in place. Contrary to recent research, our analyses also show that higher percentages of political conservatives in a state predicted lower frequencies of porn searches. Our findings support theories that more salient, traditional religious influences in a state may influence residents-whether religious or not-toward more covert sexual experiences.”

Related content:
Does watching porn make people less religious?
Do different kinds of porn portray women differently?
Flashback Friday: Google search patterns reveal human mating season.

CATEGORIZED UNDER: Sex & Mating

True or False: Sex Makes Your Muscles Weaker

By Seriously Science | May 23, 2018 6:00 am


According to this study, the answer is False (despite that fact that “Sex has been deemed taboo for athletic performance going back to ancient Rome and Greece, as the act of sex was thought to promote ease and a sense of relaxation.”) Read more below!

Effect of Sexual Intercourse on Lower Extremity Muscle Force in Strength-Trained Men.

BACKGROUND: Sex has been deemed taboo for athletic performance going back to ancient Rome and Greece, as the act of sex was thought to promote ease and a sense of relaxation.

AIM: This study examined the effect of sexual intercourse completed 12 hours before a bout of isokinetic dynamometry on muscle force production in strength-trained men.

METHODS: 12 Healthy physically active men (age = 25.6 ± 3.8 years) who were sexually active participated in this study. After men completed a familiarization session on day 1, muscle force was measured during 5 sets of maximal unilateral knee extension (KE) and knee flexion exercise at 30 deg/s after men engaged in or abstained from sexual intercourse within the previous 12 hours. The order of this treatment was randomized across participants, and time of day was maintained across all sessions.

OUTCOMES: Lower extremity muscle strength and endurance were measured. Read More

CATEGORIZED UNDER: Sex & Mating
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Seriously, Science?

Seriously, Science?, formerly known as NCBI ROFL, is the brainchild of two prone-to-distraction biologists. We highlight the funniest, oddest, and just plain craziest research from the PubMed research database and beyond. Because nobody said serious science couldn't be silly!
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