# All Questions

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### Why is the sound of fingernails on a chalkboard so intolerable?

I am curious as to what current research shows regarding why scraping noises such as fingernails on a chalkboard, a knife/fork scraping against a plate, metal grinding against metal or stone etc are ...
1k views

### Why might a stutterer not stutter when talking to themselves, whispering, or singing?

Background: I'm a stutterer myself and have always wondered what caused my stuttering. There have been reports of the effects of certain genes and environmental factors that causes stuttering. But ...
453 views

### Is “brain training” effective?

We've had quite a few questions about "brain training" on this site (see questions tagged brain-training). And the effectiveness of "brain training" has been touched on in several questions (this ...
1k views

### Game-theory strategies to overcome holdout problem?

The hold-out problem often occurs in debt-restructuring or in urban development. The hold-out problem is defined where an agent, for example a land developer, must negotiate with many lot owners and ...
276 views

### Is Behaviorism incompatible with Cognitive Psychology?

Both disciplines have historically been at each other's throats, and Radical Behaviorists like B.F. Skinner often completely reject cognitive psychology at a philosophical level. It seems that today ...
680 views

### What are the benefits of dyslexia?

Reading the Wikipedia article on Dyslexia, it sounds very negative. The article defines Dyslexia as a learning disability, which I understand it is classified as. However, knowing individuals with ...
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### What causes short-term dysphoria following intense pleasure?

I'm interested in the phenomenon of short term Dysphoria: Dysphoria is a state of feeling unwell or unhappy; a feeling of emotional and mental discomfort as a symptom of discontentment, ...
620 views

### What is the optimal repetition pattern to maximize long term memory?

Which is the appropriate repetition pattern to aid long term memory, in terms of time between study sessions? I have been reading about Ebbinghaus and doing some related research, but I can't find a ...
429 views

### Modern replacement for Panksepp's “Affective Neuroscience” book?

Jaak Panksepp's book (Amazon link here) is a phenomenal and highly readable systems-based introduction to not only affective neuroscience, but the neuroscience of motivation in general. The problem ...
305 views

### Does cognitive training enhance dopamine release?

Joe Hardy reports on a study by Backman et al (2011) in Science, where from the authors report: Updating of working memory has been associated with striato-frontal brain regions and phasic ...
285 views

### Compared efficiency of different spaced-repetition memorisation techniques

Spaced repetition is a memorization technique that works by reviewing question/answer pairs according to a schedule that depends on performance. Be it software or paper flashcards, there are various ...
425 views

### What is the current status of tetrachromacy in humans?

Tetrachromacy is a condition of having four colour channels. There is a hypothesis that some women posses 4 different types of cone cells (each with different opsin responsible for different ...
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### What defines the easiest time to get out of bed in the morning for humans?

I'm interested in sleep research, and sometimes in conversations with people the following idea gets discussed: "A person becomes aware at a certain time in the morning and feel great(while still in ...
4k views

### How to get rid of subvocalization?

When I read a text written in latin alphabet and I want to understand what it means I usually transform each word into spoken word (internal speech) and then I transform it into meaning. I can't ...
213 views

### What explains variability in the mean firing rate across biological neurons?

Biological neurons have a trade-off between high information transfer (high firing rate) and energy conservation (low firing rate). One would suspect that the maximization of this function has a ...
428 views

### Is the theory of Information Metabolism a reasonable scientific theory?

Background I have been checking out various personality typing assessments lately when I came across a Personality typing system known as Socionics which aims at explaining relationships between ...
201 views

### How does the brain calculate velocity?

How does the human brain calculate velocities? For example, when crossing a road and seeing a car coming towards you, how does the brain actually compute the rough velocity of the vehicle and your own ...
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### Have the core CBT “Thinking Errors” been found to NOT be effective in evidence-based clinical practice?

This is his chart of the ten "thinking errors." It's taken from The Feeling Good Handbook. Table 3–1. Definitions of Cognitive Distortions ALL-OR-NOTHING THINKING: You see things in black-and-white ...
2k views

### What is the effect of viewing pornography on children?

It is generally accepted that porn shouldn't be seen by children, and we even sometimes punish parents who fail to stop their children from finding porn. How much are these laws based in science? Can ...
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### How does displaying existing votes to a poll influence subsequent voting behaviour?

Some polls involve a question where the existing votes received for each response option are displayed. I have heard that on such polls the existing votes influence the answers provided by subsequent ...
128 views

### Learning of new concepts being impeded by an error in previous work

Note: I'm framing this question in terms of tutoring math since that's what I tutor most, though it applies to a wide range of subject matters. I do a decent amount of tutoring, and this is one ...
147 views

### How does daily amount of sleep vary within and between healthy adults?

I'm interested in research that has employed the following or similar research design: Measure the daily amount of sleep every day for an for an extended period (e.g., more than a month) in a ...
201 views

### Human behaviour in one-shot perfect information games

Background A one-shot game is one where two participants have some set of actions $\{1, ... , n\}$, they make their decision on which option to take (without knowing the decision of their partner, or ...
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### What do anatomical substrates of conditioned taste aversion tell us about treatment?

Conditioned taste aversions (CTAs) or Garcia effect are a byproduct of feeling ill after we've consumed a certain food. These aversions is present even if the illness is not related to ingestion and ...
438 views

### Have humans always had problems with motivation and laziness?

I originally wanted to ask a question "Is there a drug for motivation or laziness", but google search revealed that people have been asking this question for years and there's no drug that is ...
378 views

### Is the mathematician's activity psychologically healthy?

I am a professional mathematician, and I regularly meet other mathematicians. I have come to wonder if there is something like a slight neurosis, specific to this activity. To be more precise, let ...
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### What can we learn from the neural networks of C.elegans to understand human brains?

Recently I am reading some works about Caenorhabditis Elegans. A C.elegans has 302 neurons and we already know the function and connection of every one of their neurons so that we can exactly ...
383 views

### Why is training better when following an easy-to-difficult schedule?

As suggested in the answer to this question, experimental results show that training is most effective when it follows an easy-to-difficult schedule. What theories and specifically computational ...
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### Folding (wrinkles) in cortex: Why is surface area more important than volume?

When we look at the cortex of the brain, it has a folded structure. It is said that this is because this enables a greater number of neurons to exist, which is obviously advantageous. However, we ...
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### Is there an accurate online IQ test for measuring 160+ IQs?

Is there some (preferably free) online and accurate IQ test? One which does not give me an genius IQ and then tries to sell me a diploma. I need one which measures upto 160 sd15 (or higher). Such a ...
7k views

### Can we smell in dreams?

I'm interested in whether people can smell in their dreams. Do people really experience smell in their dreams? For example, if I dream of smelling a flower, will I feel the smell, too? Is there any ...
261 views

### References for biologically plausible models of knowledge representation?

I'm looking for references that deal with the issue of how various kinds of semantic knowledge are (or might be) represented neurally. Most of the discussion of this topic seems skewed by social ...
239 views

### How can I find open access journals for cognitive science research?

What open access journals that publish research in cognitive science/psychology exist? Apart from PLOS ONE, are there any other open access journals that publish research in cognitive ...
134 views

### Which are the multisensory brain areas?

What would be an example of a multisensory brain area, where multiple senses (e.g. smell and taste) are combined to decode the corresponding stimuli from more than one sensory organ? I was thinking ...
316 views

### Why do we not remember things from the first couple of years of childhood?

As parents of a soon-to-be three-year-old, my wife and I spend a lot of time planning activities and trips for our son. However, my wife wanted to hold off on some of the big ones (i.e. Disney ...
464 views

### Is it possible to quantify cognitive bias?

We know that bias exists, and that it affects our judgment and perception. This effect has to do with user's experience in life. That experience is taken care of by the brain, and if you counter a ...
225 views

### How do humans control saccades?

I've gathered the standard rational for a visual system utilizing saccades from perception textbooks: the neural cost of processing an entire scene at a high level of detail would be prohibitive, but ...
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### Is it possible to improve reading speed and visual comprehension by doing exercises?

Background I'm trying to capture detailed information from the images in my visual memory, mainly text. My daily life requires reading many documents on varying topics. I want to increase my reading ...
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### What was the experiment where you pour liquid from a tall container to a short one and ask a child which has more?

From Developmental psychology 101 I remember an experiment where the person conducting the experiment would pour liquid from a tall, narrow container into a short, narrow container and ask a child if ...
555 views

### What is the “static” in human vision called?

Sort of like a cheap digital Camera, the human eye has certain feedback that's perceived but doesn't actually exist in the real world; a little layer of Static that's especially noticeable in pitch ...
3k views

### What transient factors affect performance on IQ tests?

While performance on intelligence tests aim to measure an underlying relatively stable trait, there are presumably a range of transient factors that could temporarily lower or possibly even raise ...
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### Is there a practical limit to the amount of knowledge a human can learn?

There's definitely progressive interference and retroactive interference, which are basically two ways that old memories and new memories can interfere with each other. But on the other hand, do ...
508 views

### To what extent are correlations of father's age with birth defects and autism causal?

I read the following in the paper today: Dr Karin Hammarberg ... said that while most children are born healthy, large studies of parental age were starting to show higher rates of birth ...
164 views

### Perception of probability of being right

The probability that people percept may be different from the real one due to a number of factors, including the form in which their are presented, their context and biases (due to misinformation or ...
661 views

### What form might Jungian archetypes take in the brain?

Modern psychology and psychiatry are very well grounded in scientific principles. Both, however, have a history in various analytical philosophies. Jung had the notion of an archetype, a universally ...
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### What are biological primary mathematical skills?

In doing a bit of background reading for this question I came across a section in the book Cognitive Neuroscience: The Biology of the Mind on page 602 stating: There are no sex-related differences ...
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### What are different ways to determine centroids of fMRI activation, their drawbacks and perks?

I'm reading an older article on bilingualism (Kim, Relkin, Lee, & Hirsch, 1997) for a seminar. They were interested in the spatial separation of two languages in early and late bilinguals. They ...
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### Are there third party providers of Mechanical Turk psychology experiment services?

For various reasons it can be difficult to run a Mechanical Turk experiment (i.e., you don't have the technical expertise, you don't reside in the United States, etc.) Have any third-party providers ...