Educational, Gender, Social

The Way Children Draw Human Figures Has Changed Since The 1970s, Reflecting Modern Society’s Attitudes To Gender – German Study
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Examples of children’s drawings of a human figure, via Lamm et al, 2019

By Christian Jarrett

Over the last half century Western European countries have enjoyed a large increase in gender equality. There is a long way to go, but some statistics are striking: for instance, in Germany the employment rate for women has increased from 48 per cent in 1980 to 73 per cent in 2014. Psychologists are interested in whether, and how, these kind of societal-level changes filter down and affect children’s conceptions of gender.

To find out, a team at the University of Münster and Osnabrück University, led by Bettina Lamm, has compared the way that young German children in 1977 drew a human figure with the way that age-matched German children in 2015 drew a figure. The results, published in Sex Roles, suggest two parallel changes: girls in 2015 more often chose to draw a female figure than girls in 1977; at the same time, the children tested in 2015 depicted female figures as more distinctly feminine than the children in the 1970s.

“Societal changes over the last four decades in West Germany have clearly generated two trends,” the researchers said. “… growing status equality between the genders on the one hand, and increasing gender differentiation, on the other.”

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Cognition, Educational, Intelligence

Distinct From IQ Or Working Memory, “Implicit Learning Ability” Is An Important, Stable Trait That Varies Between Individuals
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The striking findings have implications for our understanding of intelligence

By Emma Young

There’s a huge amount of research into how people differ in their ability to learn things deliberately and “explicitly”, such as memorising a list of words or instructions, for example. Far less studied is “implicit learning”. Ask a five-year-old to explain the grammatical rules of their language and they’ll likely have no clue where to start. And yet, they do know them – or at least, well enough to form coherent sentences. This kind of unconscious acquisition of abstract knowledge is an example of “implicit” learning. 

Implicit learning may be especially important for young children, but adults depend on it, too. It “is recognised as a core system that underlies learning in multiple domains, including language, music and even learning about the statistical structure of our environments,” note the authors of a new paper, published in Cognition. 

Continue reading “Distinct From IQ Or Working Memory, “Implicit Learning Ability” Is An Important, Stable Trait That Varies Between Individuals” →

Educational, environmental, Health

Researchers Conducted Six Studies To Investigate How Best To Challenge Science Deniers
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via James Mathurin/Flickr

By Jesse Singal

When responding to science denialism (or, for that matter, any sort of false or harmful information), such as claims that vaccines are ineffective and harmful, it can be difficult to establish the right strategy. Because of the fast-paced way in which information spreads these days, there is a risk that responding to a given inaccurate claim can give it further oxygen, leading the falsehood to reach more people who are vulnerable to being misled, and so forth. There’s also the possibility of the “backfire effect” – people who already endorse the false claims reacting to the debunking information by digging into their beliefs further (though there’s now evidence such fears were overhyped, and that the backfire effect may not be a regular occurrence overall).

To better understand when science-denialism debunking does and doesn’t work, Philipp Schmid and Cornelia Betsch, both of the University of Erfurt in Germany, ran a series of studies that involved online respondents being exposed to various sorts of science debates. The results, published in Nature Human Behavior, offer some useful insights about how to best stem the tide of science denialism.

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Developmental, Faces, Perception

How A Mother’s Odour Helps Her Baby Develop A Sensitivity To Faces

GettyImages-926657584.jpgBy Emma Young

A newborn baby knows almost nothing about the world it comes into. To make sense of the onslaught of incoming sensory information, she or he must start to notice meaningful patterns and categorise them: that particular combination of visual data signifies a “face”, for example, while that noise is a “voice”. As the authors of a new paper in Developmental Science point out, “without this fundamental categorisation function, our nervous systems would be overwhelmed by the sheer diversity of our experience.” 

It had been thought that infants form these categories using information from just one sense, whichever is the most relevant. Following this account, the category of “faces” results from an accumulation of visual information about what faces look like. However, an intriguing new study, involving four-month-old infants and their mothers’ smelly t-shirts, suggests that babies’ early acquisition of the faces category is a truly multi-sensory process. 

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Health, Occupational

The Human Impact Of Having Too Few Nurses

GettyImages-620954482.jpgBy guest blogger Lucy Maddox

The UK population continues to grow, while nursing numbers have remained static for several decades. Compounding matters, The King’s Fund and Nuffield Trust have reported a 25 per cent increase in nurses and midwives leaving the NHS from 2012 to 2018, from 27,300 to 34,100. In short, in the UK, we now have far fewer nurses relative to the general population than we used to.

What does this mean for patients’ care experience? The situation sounds bad, but how bad? Common sense would suggest that patients will experience poorer care when nurses are overstretched, and there’s plenty of anecdotal evidence to support that interpretation. But there are also positive stories, and claims about greater efficiency compensating for fewer staff. 

Now a study in BMJ Quality & Safety provides direct observational evidence suggesting that lower nurse-patient ratios really do result in poorer health-care interactions. 

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Educational, Feature, Language, Memory

Five Unusual, Evidence-Based Ways To Get Better At A New Language

GettyImages-1037536210.jpgBy Emma Young

The last time I tried to learn a foreign language, I was living in an Italian suburb of Sydney. My hour a week at a local Italian class was inevitably followed by a bowl of pasta and a few glasses of wine. As an approach to language-learning goes, it was certainly more pleasurable than my German lessons at school. Despite the wine, it was also surprisingly effective. In fact, getting better at a new language doesn’t have to mean hard hours on lists of vocab and the rules of grammar. It turns out that what you don’t focus on matters, too. And a glass of wine may even help … 

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Developmental, guest blogger, Methods

The “Recency Effect” Is Especially Pronounced In Children – An Important Finding For Researchers And Parents

GettyImages-1127508247.jpgBy guest blogger Bradley Busch

As father to an 18-month-old toddler, I would love to know exactly what my son is thinking. Along with many parents, one of the ways I try to find out is to ask him questions of the variety “Do you want X or Y?” But does his answer to this type of question actually reveal his preference or is it a more a reflection of a quirky cognitive bias that is more powerful in children than adults?

Two competing effects influence how adults respond to binary choices. The first is called “The Primary Effect” which describes the way that the first option we hear tends to stick in our minds. For example, one study found that adults are more likely to choose “heads” when asked if a coin toss is going to be “heads or tails”.  The second effect, which sometimes contrasts with the Primary Effect, is called “The Recency Effect”. This captures the way that the last thing we hear or experience can also have more weight in our memory (this is why popstars end their concerts on their best songs, so that everyone leaves thinking the whole gig was great). In adults, neither the Primary Effect or the Recency Effect is always the more pronounced, with evidence suggesting that one’s personality type, familiarity of the information, and how controversial the topic is, all play a mediating role.

Keen to test if the same is true in young children, or if one of the effects is more dominant, a team led by Emily Sumner conducted two experiments and published their findings in a recent paper in PLOS One fantastically titled “Cake or Broccoli: Recency Biases Children’s Verbal Responses”.

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Forensic, Memory

Preliminary Evidence That Stress Makes Negative Memories Less Distinctive, With Implications For Witness Testimony 

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By Matthew Warren

Stress has complicated effects on our memories. Whereas some studies have found that we are better at remembering events that occurred during stressful situations, such as while watching disturbing videos, others have shown that stress impairs memory. Now a study published in Brain and Cognition suggests that stress doesn’t influence the strength of our emotional memories at all. Instead, the researchers claim, it is the fidelity of those memories – how distinct and precise they are – that changes when we go through stressful experiences. 

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Cognition, Decision making

Higher Intelligence And An Analytical Thinking Style Offer No Protection Against “The Illusory Truth Effect” – Our Tendency To Believe Repeated Claims Are True

GettyImages-952609456.jpgBy Matthew Warren

It’s a trick that politicians have long exploited: repeat a false statement often enough, and people will start believing that it’s true. Psychologists have named this phenomenon the “illusory truth effect”, and it seems to come from the fact that we find it easier to process information that we’ve encountered many times before. This creates a sense of fluency which we then (mis)interpret as a signal that the content is true.  

Of course, you might like to believe that your particular way of thinking makes you immune to this trick. But according to a pre-print uploaded recently to PsyArXiv, you’d be wrong. In a series of experiments, Jonas De keersmaecker at Ghent University and his collaborators found that individual differences in cognition had no bearing on the strength of the illusory truth effect. 

Continue reading “Higher Intelligence And An Analytical Thinking Style Offer No Protection Against “The Illusory Truth Effect” – Our Tendency To Believe Repeated Claims Are True” →

Brain, Mental health, Psychosis

A Key Brain Difference Between Voice-Hearing Patients And Voice-Hearing Healthy Controls Challenges The “Continuum Model”
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Via Garrison et al, 2019

By Christian Jarrett

Hearing voices that don’t exist in the outside world is the most common form of hallucination experienced by people with a diagnosis of schizophrenia or related conditions and it can be very distressing. However, there is a growing recognition that hearing voices is not always pathological. Many mentally well people hear voices (or “auditory verbal hallucinations”) – in fact, around 6-7 per cent of adults in the general population report having had such experiences at some point in their lives.

This has led some experts to propose a “continuum model” in which the same fundamental underlying mechanism leads to hearing voices in healthy people and in patients with a clinical diagnosis, but that for various reasons, such as a traumatic past, the experience is more troublesome and distressing for the patients. However, a new open-access paper in Schizophrenia Bulletin challenges the continuum model, finding an important brain difference between patients who hear voices and voice-hearing healthy controls.

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