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Neuroskeptic
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  • July 15, 2012
  • 06:23 AM
  • 419 views

BOLD Blobs Brighten Baby Brains

by Neuroskeptic in Neuroskeptic

Babies born prematurely show the same kind of brain activation seen in adults: but it's a lot slower. That's according to an interesting study using fMRI scanning.The authors, Tomoki Arichi and colleagues of London, measured brain activation in response to mild sensory stimulation (touching the right hand) in three groups: adults, "preterm" infants who were just 38 weeks old since conception, and "term" infants who'd been conceived about 42 weeks before scannin........ Read more »

Arichi T, Fagiolo G, Varela M, Melendez-Calderon A, Allievi A, Merchant N, Tusor N, Counsell SJ, Burdet E, Beckmann CF.... (2012) Development of BOLD signal Hemodynamic Responses in the Human Brain. NeuroImage. PMID: 22776460  

  • July 10, 2012
  • 03:58 PM
  • 362 views

The Coming Age of Fetal Genomics

by Neuroskeptic in Neuroskeptic

It's 2020. A young woman and her partner have just found out that she's pregnant with her first child. and they're going to be parents.They're overjoyed, of course. But they're also worried. They've seen the adverts warning parents-to-be about the risk of de novo mutations - genetic mistakes that occur inside sperm or egg cells, and affect the child. These mutations, the ads say, are much more common than previously believed and they can cause all kinds of problems: intellectual disabilities, au........ Read more »

Fan HC, Gu W, Wang J, Blumenfeld YJ, El-Sayed YY, & Quake SR. (2012) Non-invasive prenatal measurement of the fetal genome. Nature. PMID: 22763444  

  • July 7, 2012
  • 09:04 AM
  • 542 views

When Data Filtering Introduces Bias

by Neuroskeptic in Neuroskeptic

Oh no. Another worrying methods problem for neuroscience, this time for electrophysiologists: Systematic biases in early ERP and ERF components as a result of high-pass filtering.The event-related potential (ERP) and event-related field (ERF) techniques provide valuable insights into the time course of processes in the brain. Researchers commonly filter the data to increase the signal-to-noise ratio. However, filtering may distort the data, leading to false results. Using our own EEG data, ........ Read more »

  • July 6, 2012
  • 05:25 AM
  • 427 views

Can You Learn To Be Synaesthetic?

by Neuroskeptic in Neuroskeptic

A neat study from Dutch psychologists Olympia Colizoli, Jaap Murre and Romke Rouw claims that it's possible to train people to have synaesthesia.Synaesthesia generally comes out of the blue - some people just have it while others don't. Those who do experience it typically report that they've always had it. But could it be learned?Colizoli et al recruited 17 non-synaesthetes and got them to read books specially printed such that 4 common letters, "a", "e", "s" and "t", were always printed in a c........ Read more »

  • July 5, 2012
  • 03:42 AM
  • 704 views

The Racist Brain?

by Neuroskeptic in Neuroskeptic

Is the human brain... a racist?There are some worrying indications that it could be. After all, the cerebrum is largely composed of so-called "white" matter, and the only black area is a little 'ghetto' at the bottom called, shockingly, the substantia nigra...!Seriously though. There's a paper just out in Nature Neuroscience from Kubota et al that looks at The Neuroscience Of Race. It's a fine review as far as it goes, but to me at least, it really shows up the limits of contemporary neuroscienc........ Read more »

Kubota JT, Banaji MR, & Phelps EA. (2012) The neuroscience of race. Nature neuroscience, 15(7), 940-8. PMID: 22735516  

  • June 30, 2012
  • 05:32 AM
  • 424 views

False Positive Neuroscience?

by Neuroskeptic in Neuroskeptic

Recently, psychologists Joseph Simmons, Leif Nelson and Uri Simonsohn made waves when they published a provocative article called False-Positive PsychologyThe paper's subtitle was "Undisclosed Flexibility in Data Collection and Analysis Allows Presenting Anything as Significant". It explained how there are so many possible ways to gather and analyze the results of a (very simple) psychology experiment that even if there's nothing interesting really happening, it'll be possible to find some "sign........ Read more »

  • June 29, 2012
  • 01:25 PM
  • 645 views

B. F. Skinner vs. the Rorschach Test

by Neuroskeptic in Neuroskeptic

What happened when the world's most no-nonsense psychologist took a Rorschach test?A fun little paper reports on B. F. Skinner's Rorschach results. He agreed to be tested as part of a 1953 project psychoanalysing various eminent scientists. The scientists were anonymous at the time but now Norwegians Cato Grønnerød et al have dug them out of the archives (Skinner has been dead since 1990).Skinner was the world's leading exponent of behaviourism, a school of thought that held roughly that ........ Read more »

  • June 26, 2012
  • 02:47 PM
  • 510 views

Brain Activation Is Pretty Selective

by Neuroskeptic in Neuroskeptic

Neuroimaging researchers like to talk about bits of the brain in terms of what kind of stimuli they respond to.The "Fusiform Face Area (FFA)" and "Parahippocampal Place Area (PPA)" are two of the most popular of these 'clue is in the name' areas. The FFA lights up in response to seeing faces, while the PPA is more into places... so textbooks will tell you.But how selective are these areas really? We know that the FFA activates more to faces than to other things on average, but is there overlap? ........ Read more »

Mur M, Ruff DA, Bodurka J, De Weerd P, Bandettini PA, & Kriegeskorte N. (2012) Categorical, yet graded - single-image activation profiles of human category-selective cortical regions. The Journal of neuroscience : the official journal of the Society for Neuroscience, 32(25), 8649-62. PMID: 22723705  

  • June 24, 2012
  • 06:02 AM
  • 421 views

This Is Your Brain On Ethics - Really

by Neuroskeptic in Neuroskeptic

A new study published in Social Cognitive and Affective Neuroscience offers a look at the neural correlates of ethical decision making: Differential Neural Circuitry and Self-Interest in Real versus Hypothetical Moral DecisionsThere have been quite a few studies using neuroimaging to measure activations associated with tackling hypothetical moral dilemmas but what makes the new paper interesting is that the participants were faced with a real moral choice. Well, mostly real.The task was called "........ Read more »

Feldmanhall O, Dalgleish T, Thompson R, Evans D, Schweizer S, & Mobbs D. (2012) Differential Neural Circuitry and Self-Interest in Real versus Hypothetical Moral Decisions. Social cognitive and affective neuroscience. PMID: 22711879  

  • June 19, 2012
  • 01:51 PM
  • 465 views

Beware Stimulus Effects in Psychology

by Neuroskeptic in Neuroskeptic

Recently I've blogged about methodological problems in neuroscience research but just to even things out a bit, here's a paper that highlights a potentially serious issue for psychologists - Treating Stimuli as a Random Factor in Social Psychology: A New and Comprehensive Solution to a Pervasive but Largely Ignored ProblemSuppose you want to find out whether people react differently to stimuli from two different groups. The reactions, stimuli, and groups could be anything: maybe you want to see ........ Read more »

  • June 14, 2012
  • 03:27 PM
  • 488 views

Brains are Different on Macs

by Neuroskeptic in Neuroskeptic

Last month, neuroscientists were warned about potential biases in SPM8, a popular software tool for analysis of fMRI data.Now a paper highlights another software pitfall: The Effects of FreeSurfer Version, Workstation Type, and Macintosh Operating System Version on Anatomical Volume and Cortical Thickness MeasurementsFreeSurfer is one of the major image analysis packages and amongst other things, you can use it to measure the size of different parts of the brain. German researchers Ed Gronenschi........ Read more »

  • June 13, 2012
  • 01:17 PM
  • 409 views

Kids Today Are Not Inattentive

by Neuroskeptic in Neuroskeptic

There's no evidence that children today are less attentive or more distractible than kids in the past, according to research just published by a team of Pennsylvania psychologists: Long-Term Temporal Stability of Measured Inattention and Impulsivity in Typical and Referred Children.The study gave a large sample of kids the "Gordon Diagnostic System" GDS test of sustained concentration ability. This dates to the 80s and it consists of a box, with a button, and a display with three digits. There a........ Read more »

  • June 9, 2012
  • 04:44 AM
  • 666 views

Teaching Neuroanatomy With A Showercap

by Neuroskeptic in Neuroskeptic

Learning the names and locations of the different parts of the brain is a task that has brought grief to generations of students.I myself didn't know my caudate from my cingulate cortex all through my undergraduate studies and the first year of my doctorate. I only cracked it after spending a couple of days in the library, surrounded by a stack of anatomy textbooks, copying diagrams and coloring them in over and over until I could do it from memory.Now a group of Australian physiologists say the........ Read more »

Vanags T, Budimlic M, Herbert E, Montgomery MM, & Vickers T. (2012) Showercap Mindmap: a spatial activity for learning physiology terminology and location. Advances in physiology education, 36(2), 125-30. PMID: 22665427  

  • June 7, 2012
  • 04:15 PM
  • 408 views

That Antidepressants In Water Cause Autism Study

by Neuroskeptic in Neuroskeptic

Oh dear. The newspapers this morning are reporting thatAutism 'could be triggered by very low doses of anti-depressants or other chemicals found in water supply'Here's the study. Young fish were exposed to a combination of three drugs, two antidepressants and an epilepsy med, for 18 days. First off, this study was tiny with an effective sample size of just 6. Three tanks of fish got exposed to the drugs, and three control tanks didn't. There were multiple fish per tank, five in fact, but those a........ Read more »

Michael A. Thomas, & Rebecca D. Klaper. (2012) Psychoactive Pharmaceuticals Induce Fish Gene Expression Profiles Associated with Human Idiopathic Autism. PLoS ONE. info:/

  • June 6, 2012
  • 02:10 PM
  • 419 views

Bipolar Disorder - A BRIDGE to nowhere?

by Neuroskeptic in Neuroskeptic

Last August I blogged about a research paper that claimed that almost half of all people suffering from depression actually have features of bipolar disorder - including me: So Apparantly I'm BipolarIt was called the BRIDGE study. I took issue with it for various reasons, including the fact that it counted as 'bipolar features' any periods of irritable or elevated mood, even if they were associated with drug treatment:Under the new regime if you've ever been irritable, high, agitated or hyperact........ Read more »

David M. Allen,, & et al. (2012) BRIDGE Study Warrants Critique. Archives of General Psychiatry, 69(6), 643. DOI: 10.1001/archgenpsychiatry.2012.118  

  • June 4, 2012
  • 11:58 AM
  • 449 views

Identical Twins, Different Lives

by Neuroskeptic in Neuroskeptic

Virginia psychiatrists Kendler and Halberstadt describe a neat "natural experiment" into what causes depression - The road not taken: life experiences in monozygotic twin pairs discordant for major depressionThey interviewed 14 pairs of identical twins. One of each pair had reported a history of depression while the other hadn't. The twins were interviewed together, and asked to describe their lives, in particular any differences between their experiences.It's well worth reading, for the human i........ Read more »

  • June 1, 2012
  • 03:22 PM
  • 409 views

Seeing Things in Pictures

by Neuroskeptic in Neuroskeptic

A team of Japanese neurologists propose a new method to detect visual hallucinations - the Pareidolia Test.Pareidolia means perceiving things that aren't there, in random or unrelated stimuli. Uchiyama et al created a set of 25 photos, each of which contains things that kind of look like faces, animals, or other objects... but not really. As you can see, the flowers and the birds look like faces. I can't work out what the leopard and the trees are meant to be, though...The authors showed the pic........ Read more »

Uchiyama, M., Nishio, Y., Yokoi, K., Hirayama, K., Imamura, T., Shimomura, T., & Mori, E. (2012) Pareidolias: complex visual illusions in dementia with Lewy bodies. Brain. DOI: 10.1093/brain/aws126  

  • May 30, 2012
  • 01:44 PM
  • 429 views

ADHD: Unhappy Birthday?

by Neuroskeptic in Neuroskeptic

Earlier this year a major study of almost one million Canadian children found that rates of diagnosed ADHD - as well as use of ADHD medications like Ritalin - were higher in kids born later in the year.This is strong support for the "immaturity hypothesis" - the idea that some children get a diagnosis of ADHD because they're younger than their classmates at school, and their relative immaturity is wrongly ascribed to an illness. In British Columbia, where the study happened, the cut-off for scho........ Read more »

  • May 23, 2012
  • 02:47 PM
  • 569 views

Rich People May Not Be So Unethical

by Neuroskeptic in Neuroskeptic

There was quite the stir a few weeks back about a psychology paper claiming that rich people aren't very nice: Higher social class predicts increased unethical behavior. The article, in PNAS, reported that upper class individuals were more likely to lie, cheat, and break traffic laws.However, these results have been branded "unbelievable" in a Letter to PNAS just published. Psychologist Gregory Francis notes that the paper contains the results of 7 seperate experiments, and they all found statis........ Read more »

  • May 22, 2012
  • 02:28 PM
  • 461 views

Gaydar Works (A Bit, On Facebook)

by Neuroskeptic in Neuroskeptic

The media are gleefully reporting a recent paper showing that "gaydar is real" - we can tell who's gay just by looking: The Roles of Featural and Configural Face Processing in Snap Judgments of Sexual OrientationWhile it's a fine paper, I'm afraid that the results really aren't that exciting.American undergraduate students were able to classify people as gay or straight with better than chance accuracy, based purely on photos of their face. For male photos, the hit rate was 0.57; for women it wa........ Read more »

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