In 1914, the psychologist Leta Hollingworth’s experiments punctured holes in the prevailing idea that menstruating affects women’s intellect. But a century on, the ovulation cycle continues to interest psychologists, who today focus on how it affects sexual behaviour. A popular evolutionary psychology theory states that during fertile periods, women become more interested in men who use dominant masculine behaviour, as this signals they are likely to provide good genes for any offspring. A University of Goettingen team have now conducted the largest ever test of this idea, published as a pre-print at PsyArxiv.
Imagine that, during a quiet evening at home watching a movie with your romantic partner, you feel intense sexual desire and sensually put a hand on your partner’s thigh. Your partner does not respond and blithely continues to watch the movie… Is your partner truly not interested in sexual activity, or did she/he simply miss your cue?
So begins a new paper, published in the Journal of Social and Personal Relationships, that explores how accurate heterosexual people are at judging their partner’s attempts to initiate sex – in terms of their ability to the spot their partner’s cues, and also their overall impression of how often their partner makes sexual advances. It’s important, because as the researchers, led by Kiersten Dobson at the University of Western Ontario in Canada, note, “Sexual satisfaction is associated with relationship happiness, whereas sexual dissatisfaction is associated with relationship dissolution.”
You and your partner have had a tiff. Of all the things they could do to try to make up with you, what would be the most effective? A group of evolutionary psychologists recently put this question to 164 young adults. They presented them with 21 categories of reconciliatory behaviour, including giving a gift, cooking a meal and communicating better (derived from an earlier survey of 74 other young adults about ways to make up).
Men and women agreed that the most effective reconciliatory behaviour of all is communicating (for instance, by talking or texting). To varying degrees, both sexes also rated apologising, forgiving, spending time together and compromising as among the things their partner could do that would most likely heal wounds.
But some behaviours men thought would be more effective for making up than women, and these were their partner performing nice gestures (such as chores, favours and compliments), and offering sex or sexual favours. On the other hand, women thought their partner apologising or crying would be more a more effective way for their partner to make up than did the men.
Joel Wade at Bucknell University and his colleagues said these differences are in line with the predictions of evolutionary psychology, namely that thanks to sex differences in mating strategies shaped through our deep ancestral past, men are generally more concerned about opportunities for sex whereas women are more concerned about emotional commitment. The findings also complement past research, in the same vein, that’s found men are more likely to end a relationship if their partner is sexually unavailable, while women are more likely to end the relationship if their partner is emotionally distant.
“Evolutionary theory predicts a number of sex differences in mate selection, mate retention, and mate expulsion,” the researchers wrote in Evolutionary Psychological Science. “The present research expands this literature by documenting systematic differences in which actions men and women perceive as most effective in promoting conflict reconciliation within romantic relationships.”
Any context that encourages us to focus on a person’s body, more than their mind, is said to lead to objectification, such as when, in a previous era, a Formula One fan looked upon an attractive “grid girl” dressed in revealing clothes.
Perhaps the most serious concern about objectification is that it can lead us to disregard the rights and experiences of the objectified person. For instance, past research has shown that we’re more inclined to blame a rape victim depicted in a bikini, and more willing to (hypothetically) administer painful tablets to men and women shown wearing swim wear, rather than fully clothed.
Now a study in Cortex has taken things further by showing that volunteers’ empathy-related brain activity was diminished when they saw an objectified woman suffering social rejection, as compared with a woman who wasn’t objectified.
Update: Today, 15 March 2018, the authors of the research reported below have alerted us to a major correction to their analyses: read their full correction. In short, the sex differences in regional brain volumes in one-month-old infants were no longer statistically significant after controlling for sex differences in total brain volume. Much of our discussion below is now nullified because it pertained to results that were not in fact obtained.
On average, men and women differ psychologically in small but reliable ways, such as in personality, interests, and cognitive performance, but the basis of these differences is up for debate. Are they innate or due to how we’re socialised?
Neuroscientists look for traction on this question by studying sex differences in the brain, premised on the idea that these might contribute to the observed psychological differences. However, studying the brains of adults, or even teenagers, still leads to spinning wheels, because culturally produced differences will show up in the brain too. But how about one-month old infants, the subjects of a paper published in the journal Brain Structure and Function? Since birth, babies at this age have spent most of their time sleeping and suckling with limited eyesight, so profound socialisation effects aren’t going to be a factor. And yet, the new findings reveal that sex differences in a number of brain areas are already apparent.
Reporter: “When did you know she [Meghan Markle] was the one?”
Prince Harry: “The very first time we met”
It’s a trope of Hollywood: when two people realise in an instant that they have met the one they want to spend the rest of their lives with. In reality too, happy long-term couples will tell you, perhaps a little too smugly, and doing that gazing into each other’s eyes thing, how it was simply “love at first sight”. Mutual, of course.
We’re sorry to spoil the mood music, but a new paper in Personal Relationships – one of the first attempts to study this phenomenon scientifically – concludes that while believing one has fallen instantly in love does seem to be a genuine experience, it’s not really about love at all, but more to do with physical attraction (and it’s rarely mutual). And while people who remember having fallen in love with their partner at first sight do describe their relationship as more passionate in the present, their recall is probably little more than a “confabulated memory” – a “projection of their current feelings into the past”.
Imagine you’re out one evening with someone you met recently – you take your date’s hand in yours, or compliment your date’s appearance, or you kiss him or her passionately. For each behaviour, how likely is it that you wanted to have sex with that person for the first time? Researchers have put this question to heterosexual women, then they’ve asked men how they would interpret a woman’s intentions if she had behaved in these ways. The contrast in their answers is striking: men judge woman’s sexual intent as much higher than women do.
We could conclude from this that men read sex into situations where it isn’t there. But another explanation could be that men aren’t far off – it’s just that women under-report their true intentions. Which is closer to the truth? And what about men’s own sexual intentions – do women get those right?
In a new article in the Journal of Personality and Social Psychology,involving hundreds of US participants recruited online, Isabelle Engeler from IESE Business School and Priya Raghubir at New York University shine some light on the different ways men and women interpret the same dating behaviours.
There are behavioural differences, on average, between the sexes – few would dispute that. Where the debate rages is over how much these differences are the result of social pressures versus being rooted in our biology (the answer often is that there is a complex interaction between the two).
For example, when differences are observed between girls and boys, such as in preferences for play, one possibility is that this is partly or wholly because of the contrasting ways that girls and boys are influenced by their peers, parents and other adults (because of the ideas they have about how the sexes ought to behave). Studying non-human primates allows us to identity sex differences in behavior that can’t be due to human culture and gender beliefs.
Learning more about the biological roots of behavioural sex differences should not be used as an excuse for harmful stereotyping or discrimination, but it can help us better understand our human nature and the part that evolved sex differences play in some of the most important issues that affect our lives, including around diversity, relationships, mental health, crime and education.
“Many sex differences in behavioral development exist in nonhuman primates,” she writes, “despite a comparative lack of sex-biased treatment by mothers and other social partners”. Here is a digested account of five of these behavioural sex differences:
The hot-headed “macho man”, who acts first and thinks later, has long been popular in movies. Now there’s psychological evidence to support it. A new study in the Psychological Science finds that a short-term rise in testosterone – as might occur when in the presence of an attractive potential mate, or during competition – shifts the way men think, encouraging them to rely on quick, intuitive, and generally less accurate, judgements, rather than engaging in careful, more deliberate thought.
Most brain imaging studies involving transgender people or people with gender dysphoria have focused on whether their brains look more like what’s typical for the gender they identify with, rather than the gender they were assigned at birth based on their biological sex. For example, whether trans men have “masculine” brains, and trans women have more “feminine” brains.
The results have been mixed and if anything point towards trans people having brains with distinctfeatures that are neither stereotypically male or female.
A new study in Brain Imaging and Behaviour adds to this trend, showing that trans men have unusual patterns of connectivity in brain networks involved in processing of the self, as compared with male and female controls. “The present data do not support the hypothesis that sexual differentiation of the brain of individuals with gender dysphoria is in the opposite direction as their sex assigned at birth,” the researchers said, adding that the unusual connectivity patterns they found in trans men “was detected in comparison with both male and female controls, and there were no differences between the control groups”.