Poor sleepers may be hoping that with the gradual liberalisation of marijuana laws around the world, a new drug to help them sleep will soon become legally available. Bad news, then, from a new diary study, published in Health Psychology, of people who take cannabis as a sleep aid. While the drug seemed to improve some aspects of sleep, it also led people to feel more tired the next day.
Your personality traits play an important part in how long you are likely to live, as much as, or even more than, other personal factors like your intelligence and your family’s economic background. Now a study in the Journal of Research in Personality has identified a key factor that mediates the personality-mortality link – sleep. Simply put, people with certain personality characteristics are more likely to sleep too little, or too much, or to experience greater sleepiness during the day, and in turn this raises their year-on-year risk of dying (too little or excess sleep, and poor quality sleep, have known links with various health risks, such as cardiovascular disease, depression and chronic inflammation).
“Sleep has been associated with both personality and longevity, yet [before now] no study has investigated whether sleep is a pathway linking personality to objective health outcomes,” say the researchers, led by Shantel Spears at West Virginia University.
We often think of sleep as a chance to switch off from the outside world, leaving us blissfully ignorant of anything going on around us. But neuroscience research has shown this is a fantasy – we still monitor the environment and respond to particular sounds while we’re sleeping (at least in some stages of sleep) – a fact that will be unsurprising to anyone who has woken up after hearing someone say their name.
Now a study published in Nature Human Behaviour has revealed more about the brain’s surprisingly sophisticated levels of engagement with the outside world during sleep. Not only does the sleeping brain respond to certain words or sounds – it can even select between competing signals, prioritising the one that is more informative.
By Emma Young
As every parent knows, gentle rocking helps a baby to fall asleep. Now a new study, published in Current Biology by researchers in Switzerland, shows that a rocking bed also benefits adults, extending the time that they spend in deep, slow-wave sleep, helping them sleep more soundly, and increasing their memory consolidation through the night. A related rocking study on mice, conducted by a team involving some of the same researchers, and published in the same journal issue, helps to reveal how rocking might have these effects.
By guest blogger Julia Gottwald
The last time you and your class-mates or co-workers pulled an all-nighter before a deadline, you may have noticed: there are always those lucky individuals who seem to do just fine after a lack of sleep, while others feel drowsy and confused – almost like they had too much to drink.
New research conducted at the German Aerospace Center suggests this could be because alcohol intoxication and sleep deprivation are more similar than we once thought.
In their study published recently in PNAS, Eva-Maria Elmenhorst and David Elmenhorst and their colleagues show how both affect us via a shared mechanism. And what’s more, if you’re sensitive to one, you’re likely to cope poorly with the other as well.
By Emma Young
“I have been lost in a daydream for as long as I can remember….These daydreams tend to be stories…for which I feel real emotion, usually happiness or sadness, which have the ability to make me laugh and cry…They’re as important a part of my life as anything else; I can spend hours alone with my daydreams….I am careful to control my actions in public so it is not evident that my mind is constantly spinning these stories and I am constantly lost in them.”
The 20-year-old woman who emailed these reflections to Eli Somer at the University of Haifa, Israel, diagnosed herself with Maladaptive Daydreaming, sometimes known as Daydreaming Disorder. While Maladaptive Daydreaming is not included in standard mental health diagnostic manuals, there are cyber-communities dedicated to it, and “in recent years it has gradually become evident that daydreaming can evolve into an extreme and maladaptive behaviour, up to the point where it turns into a clinically significant condition,” write Somer and Nirit Soffer-Dudek at Ben-Gurion University of the Negev, in a new paper on the disorder, published in Frontiers in Psychiatry.
Can psychology help us get a better night’s sleep? Our presenter Ginny Smith hears how worry about sleep is sometimes more of a problem than lack of sleep itself. She gives us some evidence-backed sleep tips and finds out about “sleep engineering” – deliberately manipulating the sleep process to aid memory and enhance its health benefits.
Background reading for this episode:
- “Insomnia identity” – misbelieving you’ve got sleep problems can be more harmful than actual lack of sleep
- BBC News: Sleep engineering: Cardiff scientists working on designer rest
- Targeted memory reactivation of newly learned words during sleep triggers REM-mediated integration of new memories and existing knowledge
Also, find many more studies on sleep and dreaming in our archive.
Episode one: Dating and Attraction.
Episode two: Breaking Bad Habits.
Episode three: How to Win an Argument.
Episode four: The Psychology of Gift Giving.
Episode five: How To Learn a New Language.
Episode six: How To Be Sarcastic 😉
Episode seven: Use Psychology To Compete Like an Olympian.
Episode eight: Can We Trust Psychological Studies?
Episode nine: How To Get The Best From Your Team
Episode ten: How To Stop Procrastinating
PsychCrunch is sponsored by Routledge Psychology.
Routledge interviewed PsychCrunch presenter Christian Jarrett about the aims of the podcast and engaging with the public about psychology research.
You’ve had all day to worry, but your brain decides that the moment you rest your weary head upon your pillow is the precise instant it wants to start fretting. The result of course is that you feel wide awake and cannot sleep. Two possible solutions: (1) spend five minutes before lights out writing about everything you have done. This might give you a soothing sense of achievement. Or (2) spend five minutes writing a comprehensive to-do list. This could serve to off-load your worries, or perhaps it will only make them more salient? To find out which is the better strategy, a team led by Michael Scullin at Baylor University invited 57 volunteers to their sleep lab and had half of them try technique 1 and half try technique 2. Their findings are published in the latest issue of the Journal of Experimental Psychology: General.
By Alex Fradera
“In the dark, in the quiet, in the lonely stillness, the aggrieved struggle to rescue sleep from vigilance.” This arresting sentence introduces a new review of insomnia in Behaviour Research and Therapy that addresses a troubling fact observed in sleep labs across the world: poor sleep is not sufficient to make people consider themselves to have the condition… and poor sleep may not even be necessary. The paper, by Kenneth Lichstein at the University of Alabama, explores the implications of “Insomnia Identity”: how it contributes to health problems, and may be an obstacle to recovery.
By Alex Fradera
For me, dreams and creativity have always been wound tightly together. As a teenager leafing through my dad’s Heavy Metal comic strip anthologies, it was Little Nemo in Slumberland (about a character who has fantastic dreams) that stunned me the most. When I became a psychology researcher, I was fascinated with altered states and formed a short-lived dream research group with my fellow PhD students – somnambulant life seemed so mysterious, and the then-received wisdom that dreams were just brain static was becoming untenable. Today, outside of my science hours, I perform improvisational theatre, most intensively with The Dreaming, a surrealistic troupe mimicking dream-logic. And in recent years, I’ve made my sporadic dream-logging into a habit (tip: keep a voice recorder by your bed and capture everything you can without worrying about sense or structure). Could this habit make me more creative? According to new research published in the Journal of Creative Behavior, it could.