Category: Psychology

  • The incredible reason why you should be exercising regularly

    I think everyone is sold on the idea that exercise is good for the body, assuming no contraindications. Everyone who can, should do it – it makes you physically healthier, stronger, etc.

    Fewer people are aware of it’s effect on mood though, which I have discussed before. Physical exercise makes you happier, and more likely to overcome stressful setbacks that you encounter through your life. I believe it was Tal Ben-Shahar who said “Not exercising is like taking depressants.”

    Fewer people still are aware of another benefit to exercise. It’s even good for the brain. Is there nothing it can’t do?

    Take dementia for instance. Laurin et al (2001) looked at a huge sample of randomly selected Canadian men and women. 6,434 of these were ‘cognitively normal’ at baseline; that is, no dementia. Five years later, 4,615 people completed a follow up test which asked them about their exercise habits, as well as other tests, such as for cognitive impairment.

    High levels of activity were associated with reduced risks of cognitive impairment, dementia (of any type), and Alzheimer disease. The odds of someone having Alzheimer’s in the group who exercise were half as low as those who did no exercise at all!

    So it seems that regular physical activity might be a preventative factor in age related cognitive decline and Alzheimer’s. This is pretty big.

    But the benefits of exercise do not seem to stop at prevention – they may actually have an augmenting effect on cognitive function in healthy adults; and the evidence for this is getting stronger.

    Take Winters et al (2007) for instance. They took a group of people, got them to run around a bit, and then tested their learning performance, both immediately afterwards and long term. They found that vocabulary learning was 20% faster after intense exercise, as well as increases in a protein called brain-derived neurotrophic factor, or BDNF, and sustained BDNF was linked to greater learning success. BDNF is sort of the holy grail of cognitive enhancement, helping to support the survival of existing neurons as well encourage the growth of new neurons and synapses. This protein may explain both the preventative and enhancement effects of exercise on cognitive function.

    So when you’re wondering whether to get off your ass and get to the gym today, keep this in mind – you’re not only keeping your body healthy, you’re improving your mental function and preventing cognitive decline.

    This might also play a role in the timing of your exercise sessions. Try working out immediately prior to any time you need to learn. It should improve your performance.

  • Tim Ferriss, Email, and science reporting – Weeding out the bad data on productivity

    As many of you know, I’m in the process of writing a book: a psychology study guide to be precise. One of the things it will cover is time management, planning, productivity; that sort of thing. While researching this chapter (the last one to do I might add), I remembered an interesting study that Tim Ferriss mentioned on his site. It found that people who were distracted during an IQ test by email and ringing phones actually did worse than people who were high on marijuana. That’s just the sort of quirky study I’d love to cite. It’s interesting, it would stick out in peoples’ minds.

    In Tim’s words:

    “In 2005, a psychiatrist at King’s College in London administered IQ tests to three groups: the first did nothing but perform the IQ test, the second was distracted by e-mail and ringing phones, and the third was stoned on marijuana. Not surprisingly, the first group did better than the other two by an average of 10 points. The e-mailers, on the other hands, did worse than the stoners by an average of 6 points.”

    I wanted to find the original study for my book. With the help of Matt Fox of Persuasion Theory fame, I tracked down a Beyond the Biz article entitled “Study offers dope on e-mail madness” (good title; not as good as mine), which had more details of the study. Some highlights:

     

    “E-MAIL HAS A MORE DETRIMENTAL EFFECT on British workers’ IQs than smoking marijuana, according to a Hewlett-Packard study conducted by TNS Research. Dr. Glenn Wilson, a psychiatrist at King’s College at London University, monitored worker IQ throughout the day in 80 clinical trials. Wilson said the IQ of workers who tried to juggle e-mail messages and other work fell by 10 points-more than double the four-point fall seen after smoking pot, and about equal to missing a full night’s sleep.”

    We have a name! And it’s the well-known Dr Glenn Wilson, no less. And he monitored IQ throughout the day? In 80 trials? Wow, must be a solid finding! The article continues:

    “He added the IQ drop was more significant in men in the study, which was conducted with 1,100 people. Wilson advocates companies helping employees solve the problem. “Companies should encourage a more balanced and appropriate way of working,” he said.”

    OK so now we’re talking about ‘the’ study with 1,100 people. Is that in each of the 80 trials? That would make 88,000 participants. That’s a lot of pot! Either something’s amiss here or Dr Wilson has his ethics committee wrapped around his little finger! So maybe those 1,100 people are spread across the 80 trials. That would make an average of 13.75 participants per trial. I’m not sure which is most unlikely – a psychiatrist doing 80 trials with less than 5 participants per group, or 29,333 people getting stoned in the name of science.

    This is not looking altogether kosher.

    In a section of his site called “The Truth,” Tim Ferriss cites a New York Magazine article on Dec 4th 2006, called “Can’t Get No Satisfaction.” For your convenience, here is a link directly to the page of the magazine in question. For your greater convenience, here is a quote of the relevant section:

     

    “In 2005, a psychiatrist at King’s College London did a study in which one group was asked to take an IQ test while doing nothing, and a second group to take an IQ test while distracted by e-mails and ringing telephones. The uninterrupted group did better by an average of ten points, which wasn’t much of a surprise. What was a surprise is that the e-mailers also did worse, by an average of six points, than a group in a similar study that had been tested while stoned.”

    As you can see, New York Magazine clearly states that there were TWO groups in the study. The marijuana group data was from another study. Comparing data from one study to data from a ‘similar’ study is not something you should do without firm justification. They didn’t even give references.

    But whatever, even though the marijuana aspect is pretty central to these articles, I’m more interested in the effects of distracting emails so I can write about it in my book. So I did some further digging to find the original study.

    Conveniently, Glenn Wilson has a report on his site here (it’s the ‘infomania’ link at the bottom). This cleared everything up.

    Wilson was commissioned by Porter-Novelli to supervise an in-house experiment, which would accompany a survey of 1,000 people. Wilson had nothing to do with the survey, and just helped out with the experimental side of things.

    His study tested 8 employees in two conditions – a ‘quiet’ condition and a ‘distracting’ condition (mobile phones ringing, emails arriving; usual office stuff). He measured IQ with a matrices-type test (which I’m not familiar with), as well as physiological measurements. He did find that distraction reduced IQ performance and increased stress, but 8 participants? That’s a pilot at best. Hardly newsworthy.

    But no blame on poor Wilson here, he just did the job he was asked to do. It’s in the reporting of the study where things went a little bit silly.

    Somewhere along the line, “8 participants” become “80 clinical trials”. That is absolutely laughable. The 1,100 participants obviously came from the 1,000 participant survey that came up. But it is shocking how people will literally lie like this.

    Wilson leaves a note at the end of his report:

     

    “This study was widely misrepresented in the media, with the number of participants for the two aspects of the report being confused and the impression given that it was a published report (the only publication was a press release from Porter-Novelli). Comparisons were made with the effects of marijuana and sleep loss based on previously published studies not conducted by me. The legitimacy of these comparisons is doubtful because the infomania effect is almost certainly one of temporary distraction, whereas sleep loss and marijuana effects on IQ might conceivably be more fundamental, even permanent.”

    And later said on the matter:

     

    This “infomania study” has been the bane of my life. I was hired by H-P for one day to advise on a PR project and had no anticipation of the extent to which it (and my responsibility for it) would get over-hyped in the media. ??There were two parts to their “research” (1) a Gallup-type survey of around 1000 people who admitted mis-using their technology in various ways (e.g. answering e-mails and phone calls while in meetings with other people), and (2) a small in-house experiment with 8 subjects (within-S design) showing that their problem solving ability (on matrices type problems) was seriously impaired by incoming e-mails (flashing on their computer screen) and their own mobile phone ringing intermittently (both of which they were instructed to ignore) by comparison with a quiet control condition. This, as you say, is a temporary distraction effect – not a permanent loss of IQ. The equivalences with smoking pot and losing sleep were made by others, against my counsel, and 8 Ss somehow became “80 clinical trials”.

    Since then, I’ve been asked these same questions about 20 times per day and it is driving me bonkers.

    You’ve gotta feel for the guy.

    So even though I’m a little late to the party I thought this was worth mentioning, just to highlight that you cannot trust something just because it has been published – even in so-called ‘reputable’ places.

    Remember, this was an in-house study with 8 participants which had *nothing to do with marijuana whatsoever*. And look what happened:

    Any my personal favourite:

    • Email destroys the mind faster than marijuana – study (The Register)

    DESTROYS the mind! Are you kidding me?!

    All these articles mention the marijuana link too.

    So whose fault is this? I don’t know who started it. I can’t be bothered to check. It wasn’t Tim Ferriss. But everyone is guilty of not checking their sources. This time the only victims were Dr Glenn Wilson’s inbox and a few concerned citizens, but you can imagine how the same process on more serious topics could be quite destructive.

    It would be nice if the sources above updated or removed the articles in light of the fact that they are, well, a load of bullshit. Out of curiosity over what would happen, I sent the following email to most of the above sources:

    To whom it may concern,

    I’m writing with regards to your article:

    XXXXXX

    Which discusses the effects of marijuana on IQ. I thought I would bring to your attention the fact that your article is incorrect. The study in question did not actually look into the effects of marijuana at all, although this is certainly an honest mistake, as many news outlets have made the same error.
    The true study was:

    * A small test involving 8 participants
    * Looking at distractions of email/phone against quiet conditions
    * Not connected with the Institute of Psychiatry at Kings, except for the fact that the person hired to supervise the study, Dr Glenn Wilson, is a member of that faculty

    Further information is available here:

    http://itre.cis.upenn.edu/~myl/languagelog/archives/002493.html

    In the interests of accurate news reporting I am bringing this matter to your attention so that you can make the necessary alterations to your article.

    With kind regards,
    Warren Davies

    As you can see, I sound very polite and formal. I thought I would be taken more seriously that way, as opposed to an informal “Hey dude! FYI….” . Let’s see if anyone will agree to change their article to reflect the truth. Tim Ferriss is difficult to contact by definition, but I’ve sent him a message on twitter just in case.

    Now, if you’ll excuse me, I need to get to work on that book chapter I was talking about. Right after I check my email and finish this bong, that is.

  • Approaches to cognitive psychology

    Cognitive psychology is a field concerned with the internal processes that we use to perceive our environment, process those perceptions, and decide on an output (action). Anything to do with perception, attention, memory, problem solving, creativity, etc., are of interest to cognitive psychologists.

    They say that the human brain is one of the biggest unsolved mysteries there is. Some people even say this is a mystery that can’t be solved; that the brain, cognition, and all that goes with it are too complex for us to really know what’s going on. Of course, people have said that about a lot of things. Research into cognition has been picking up pace since the 1950s, and started sprinting within the last 15-20 years when neuroscience got involved too. I remember watching a TED talk (don’t remember off hand who it was, sorry), where the speaker said we’d have a full specification of the brain and how it works by the 2020s. I think that’s a bit optimistic, but since there are so many useful approaches to cognition, it might not be far off. Here are the four main approaches to this area of psychology.

    Approaches to cognition

    1) Experimental Cognitive Psychology – This involves doing experiments under laboratory conditions, trying to get a handle on a specific brain process that has been theorised. For example, in tests of memory they might see how well people can remember a list of words under various conditions (long words, short words, interfering noises, and so on).

    2) Cognitive Neuropsychology – One way of investigating cognition is to study people who have suffered brain damage. Are there any specific cognitive impairments brought about by damage to a particular brain region? If so, it’s likely that the damaged area is involved in that cognitive function.

    3) Computational Cognitive Science – This involves creating computer-based models of human cognitive functions, as well as work from artificial intelligence.

    4) Cognitive Neuroscience – This has become very popular in the last decade or so, and involves using brain-imaging devices to study cognitive functions. This can help to discover where these processes occur in the brain, and when (including for instance, the order that different areas are activated when a person attempts a task).

    On their own, these approaches to cognitive psychology have their limitations. For example, you could argue that experimental cognitive psychology takes people too far out of their real-life environments to be able to generalise from, and computational cognitive science can often be used to create a huge number of potential models and there is controversy over how relevant it is to knowing where cognition happens in the brain.

    But the main value is in seeing where each approach agrees and disagrees with the others; there are four different ways to test a theory, so what comes out the other end intact will be good candidates for solid theories. This is commonly known as converging evidence, and it’s a very powerful way to conduct research. But powerful enough to give us a full map of the brain and how it works in the next 20 years? I’m saying no. What do you think?


    Recommended Reading:

  • Weaknesses of the working memory model

    We’ve recently looked at Baddeley and Hitch’s working memory model, which they first proposed back in 1974 and has been through a few changes since then. For an overview of the working memory model, see this article, and there’s another one looking at the strengths of the model. Here’s a quick look at some of the weaknesses of the model, which mainly revolve around the lack of understanding and depth of the model at present.

    Weaknesses of the working memory model

    1) The components of the model may as yet be too simple, and do not explain the full range of day-to-day phenomena, for example, some things we’re pretty good at remembering, unless someone starts talking to us while were trying to remember it. Is there any information that is not as prone to decay as it is to interference from competing input?

    2) The central executive is poorly understood. Since there are only modest correlations between people on different executive functions, and since some people can lose some executive functions but keep others, it’s highly unlikely that the CE is one unitary construct. Without knowing how the CE is broken down, it’s very difficult to come up with hypotheses to test the model further, and to know how these subsections relate to each other and the other parts of the model. Take verbal rehearsal for example. Does the CE initiate this, monitor it, maintain it? Or is it purely a function of the phonological loop?

    3) Researchers do not yet have a detailed understanding of how the episodic buffer combines information from the other parts of the model, and from long-term memory.

    Recommended Reading:

  • Why 88% of New Years' resolutions fail

    Jonah Lehrer wrote an excellent article for the Wall Street Journal on why New Year’s resolutions fail.

    Quick overview of reasons:

    • The more overloaded our brain is with ‘stuff’ (including resolutions we need to keep track of), the weaker its willpower is. We need to spread our resolutions across the year.
    • Just like a muscle, our will-power has limited capacity – don’t make it do too much or you’ll lose self-control.
    • Again, just like a muscle, exercising will-power uses up energy (glucose), so beware if you’re trying to lose weight as a resolution – starving yourself will reduce your will-power.
    • When you reach the inevitable point of temptation, distract yourself rather than trying to power through.
    • Will-power can be trained and training it in one domain (eg posture) increases will-power in others

    I really recommend the article, it’s great stuff. You can also find Jonah’s blog here.

  • Subliminal Advertising: Should we be worried?

    In 1957, a gentleman by the name of James Vicary created a new concept: Subliminal advertising. He flashed the words “Eat Popcorn” and “Drink Coca-Cola” for a fraction of a second during a film, and claimed increases in sales of these products of 18% and 57% respectively.

    But, there’s one other thing that bugged me about that ‘study’. The name of the film. It was called ‘Picnic’. I’ve never seen this film, and I don’t know if you have, but I find it hard to imagine that there weren’t multiple scenes of gratuitous eating and drinking in it! Could this possibly have a more powerful effect than a few words, flashed for only 1/300th of a second?

    Maybe, but this is all academic, as Vicary supposedly admitted to fabricating his results. Still, I think my general point is valid.

    Most people would see subliminal messages as some kind of slimy, dirty, underhanded advertising trick, right up there with spam emails. However it’s apparently OK to use every other persuasion technique in the book to get you to buy something: celebrity endorsements which bring authority and social proof. Free gifts to trigger the reciprocity principle. Short-term sales to activate the scarcity principle. Are these things underhanded? Oh no, these are all fine, but throw in a capitalised word for 1/300th of a second, and there’ll be riots!

    Advertisers are throwing the big guns at us, and we’re worried about the little pee-shooter in the corner. I think it’s the feeling of being cheated; that they are not playing by the rules. Manipulate us, sir, but not behind our backs; that would be wrong.

    But is this something we should be worried about? Probably not. In 1992, a review of over 200 studies of subliminal advertising concluded that there is very little evidence to support the idea that subliminal advertising can influence our behaviour. (1)

    But sometimes you’ll hear stories of people that were ‘influenced’. You’ve got to be careful that you’re not seeing what you want to see; adapting your interpretation of your experience to fit your beliefs, rather than the other way around. Vicary publicly announced that he’d run another subliminal message, this time on live TV. He flashed the phase “telephone now” during a program. Call-in rates didn’t increase, however some viewers reported that they had the uncontrollable urge to get a drink or use the toilet. Interesting. Because that never happens when people aren’t flashing subliminal messages at you!

    So how did we start at Vicary’s supposedly fabricated first study, go through the failed second one, the 1992 rebuke, and still end up at, for example, the telegraph, September 2009: “Subliminal advertising really does work, claim scientists.

    Claim scientists? Hang on a second. Weren’t the scientists the ones saying subliminal messaging in advertising DOESN’T work? What’s going on here?

    Well there’s a difference between subliminal messages changing someone’s behaviour, and the subliminal perception of a message. Very important distinction. The study reported by the telegraph asked people to rate whether the word was positive or negative; it didn’t look into behavioural consequences of that perception.

    We came across a similar study in the priming article. People seem unconsciously aware of whether subliminal messages are positive or negative, but it takes more overt priming to bring behavioural consequences. Not much more; but read the priming article for more information on that. This brings me nicely back to my point: Don’t worry about subliminal messages in advertising, they probably aren’t going to effect you. It’s the very blatant, obvious stuff you should be worrying about!

    Maybe blatant persuasion and propaganda is something we’ll look into another day. I’d cover it now, only I have the strangest urge to go buy some popcorn and coca-cola…

    References:

    (1) Pratkanis, A & Aronson, E. (1992). Age of Propaganda: The Everyday Use and Abuse of Persuasion. NY: W.H. Freeman

  • 6 Strengths of the working memory model

    The working memory model discussed earlier has a lot going for it compared to other memory models. Here are a few things:

    strengths of the working memory model
    The working memory model.

    1) Unlike some other models (eg, the short-term store model), the working memory model explains not only the storage, but also the processing of information.

    2) Specificity. Because the model proposes specific and separate functions and subsystems, new predictions and hypotheses can be drawn up for testing.

    3) It is consistent with records of brain-damaged patients. For example the visuo-spatial sketch pad is said to be made of two parts, the visual cache which stores information about colour and form, and the inner scribe, which processes spatial and movement information. Patient ‘LH’ had more difficulty with visual tasks than spatial tasks, which probably means that there is a different part of the brain controlling these things; just as the model suggests (1). Another example is ‘KF’, whose forgetting of auditory stimuli was higher than visual stimuli. (2) There are quite a few cases like this, which support the model.

    4) The model integrates a large number of research findings. As well as studies on brain damaged patients, there is also experimental evidence which supports the model (eg., Baddeley and his colleagues’ word-length effect (3) supporting the phonological loop), and a number of brain-scan studies have found different brain regions to activate when people carry out tasks involving the different components of working memory (4; this paper and many others are available for download here).

    5) A previous model placed enormous importance on verbal rehearsal for transferring information into long-term memory; this doesn’t match up well with our day-to-day experience. In the working memory model, verbal rehearsal is noted as one way to encode and store information, but there are other routes too (visual stimuli, the episodic buffer, etc). From this point of view, it’s more realistic.

    6) The working memory has a strong role in cognitive psychology and can be used to study other theorised systems and processes in the brain (eg., consciousness), by seeing how they relate to working memory. A perfect example of this, is how the central executive allows researchers to look into how memory relates to attention.

    There you go, six starting points for the evaluation section of any essay or exam you might have on this topic, or more detailed information for people who are just plain interested. By they way, if you’re a psychology student, you may also be interested in my study skills book!

    References:

    (1) Farah, M.J., Hammond, K.H., Levine, D.N. & Calvanio, R. (1988). Visual and spatial mental imagery: Dissociable systems of representation. Cognitive Psychology, 20, 439-462.
    (2) Shallice, T., & Warrington, E. K. (1970). Independent functioning of verbal memory store: A neuropsychological study. Quarterly Journal of Experimental Psychology, 22, 261–273.
    (3) Baddeley, A.D. et al. (1975). Word length and the structure of short-term memory. Journal of Verbal Learning and Verbal Behavior 14, 575–589.
    (4) Sala, J.B., Rama, P., & Courtney, S.M. (2003). Functional Topography of a Distributed Neural System for Spatial and Nonspatial Information Maintenance in Working Memory. Neuropsychologia, 41(3), 341-56.


    Recommended Reading:

  • Change Blindness

    Ever notice a blank wall where a painting used to be, only to find out it had been gone for days? That’s change blindess at work. As we go about our business, our visual scene is changing frequently. We think that we have a clear and accurate view of the world as we move around it; but we’re actually not that great at detecting changes in our visual environment. This is going on all the time – things in your environment change, but you’re none the wiser.

    This even applies to changes that you would think were completely obvious. The classic study on change blindness had a researcher ask participants for help with some written directions. While they were talking, a brief distraction was arranged, during which a confederate switched places with the researcher, and continue the conversation. Amazingly, most of the participants did not even notice the switch, and carried on talking to the completely different person! (1) Here’s a video of a similar study, reporting that 75% of people didn’t notice!

    How is change blindness explained?

    There is still work to be done in this area, but the main theory is based on the idea of mental maps of scenes, which are stored in long-term memory. (2) When we fixate our attention on a particular aspect of our visual environment, it gets added to the mental map. These representations are thought to be fairly detailed, though not wholly accurate, and they stay for some time after they’re formed. Unless a particular aspect of a scene has been indexed in the mental map, there’s nothing to compare it with to realise there has been a change. So the most important factor in change blindness is not memory, but attention. If something hasn’t been fixated on, according to this theory, it doesn’t get added to the map, and changes to it (or its disappearance) won’t be noticed.

    Where to go for more information on change blindness

    For general interest, the You Tube clip linked to above is worth watching, but for academic interest get Hollingworth and Henderson’s 2002 paper (it’s on Andrew Hollingworth’s website for free download), also look up Rensink’s work.

    References:

    (1) Simons, D. J. & Levin, D. T. (1998). Failure to detect changes to people during a real-world interaction, Psychonomic Bulletin and Review, 5, 644–649

    (2) Hollingworth, A., & Henderson, J. M. (2002). Accurate visual memory for previously attended objects in natural scenes. Journal of Experimental Psychology: Human Perception and Performance, 28, 113-136.

    Recommended Reading:

  • Baddeley and Hitch: Working Memory

    I’ve been looking for information on memory recently, searching for ways to improve it. I know a few tricks (the peg system), but I don’t want to using a technique every time I try to remember something, I want general performance improvement. One way to improve the performance of a system is to learn how it works, and go from there.

    This is where researchers Baddeley and Hitch come in (1). Most people think of human memory as being a passive storage space, but this isn’t actually the case. According to Baddely and Hitch’s working memory model, memory is an active set of processes (this is short-term, not long term memory) – when we first perceive something, it is ‘worked on’ in working memory. This is called encoding. Memories have to be encoded before they can be stored in long-term memory.

    Baddeley and Hitch’s working memory model has a few separate parts to it, each processing different types of information:

    baddeley and hitch working memory

    Baddeley and Hitch: Working Memory

    The central executive

    This is the master controller of the working memory system. It’s functions are thought to include switching attention between tasks, selecting/ignoring stimuli, and activating necessary information from long-term memory. At the moment it’s unclear whether the central executive is one unitary mechanism, or whether it can be broken down into subsystems.

    The phonological loop

    This component holds speech-based information. It has two parts – a phonological store, which temporarily holds speech information, and the articulatory control process (ACT; the arrow in the diagram), which is the part that’s working when you’re talking to yourself in your head. The ACT is one way of getting information into the phonological store, but, information in the phonological store starts to decay after a few seconds. This is why to remember a phone number you need to keep repeating it over and over until you find a pen – you’re refreshing the decaying information by it by putting it through the ACT again.

    Visuo-spatial sketch pad

    Not surprisingly, this is the part that processes visual information. This might be from your eyes, recalling a memory, or creatively visualising something. If you’re seeing with your “mind’s eye,” or mentally manipulating an image, this is the part that’s working.

    The episodic buffer

    Information is encoded differently in the phonological loop and the visuo-spatial sketch pad, while the central executive can only process, not store. The episodic buffer is able to combine information from the above components into a single representation. This was added to the model only recently (2000), because a number of research findings were hard to explain without it. (2)

    Anything useful in Baddely and Hitch’s working memory model?

    Study tip

    The phonological loop explains why it’s a really bad idea to listen to music with lyrics while studying. If you’re paying any attention to the music, it will enter the loop, and compete for encoding with whatever you’re reading – even if you don’t read ‘in your head’, looking at words visually seems to put them into the phonological store too. If you don’t encode the information, you won’t store it, and you’ll have a harder time remembering it tomorrow, let along in an exam.

    Repetition

    As the above stores only have a short capacity, one way of making encoding more likely is repetition. The more times you go over something, the better you’ll remember it. So read and re-read the thing you need to remember, in your head and out loud.

    Chunking

    Because the working memory system can only hold a limited number of discreet items (between 5 and 9 for the loop), to increase it’s capacity we have to chunk larger amounts of information together. For example, a string of 10 one-digit numbers could be chunked into a string of five two-digit numbers.

    Attention

    Generally speaking, anything we’re not fully attending to will face competition for encoding. Have you ever been on a bus, daydreaming, and later be completely remember what the person in front of you looked like? When your focus is on your internal images, the input from your eyes isn’t encoded as easily (if at all). The central executive is monitoring what’s going on, of course, so if the person turned around and was incredibly beautiful, or holding a weapon, your attention would be diverted accordingly.

    But the general point here is that giving something your full attention gives you a better chance of remembering it, because it will have less competition in the temporary storage areas outlined above, and is therefore more likely to be encoded and then stored in long-term memory.

    References:

    (1) Baddeley, A.D., & Hitch, G.J. (1974). Working memory. In G.H Bower (Ed.), The psychology of learning and motivation, Vol 8. London: Academic Press.

    (2) Baddeley, A.D. (2000). The episodic buffer: A new component of working memory? Trends in Cognitive Science, 4, 417-423

  • Creativity and Originality

    Imagine the classic image of the troubled artist; filled with angst and pain, tormented by something-or-other, but pulls out these classic works of art that inspire people for generations. How does this stereotype fit in with studies showing that creativity is enhanced through positive moods and emotions? (1) Is there a contradiction here? No, there’s just a slight distinction that needs to be made between creativity and originality.

    Originality

    Originality refers to the production of a new idea, without any particular care for whether these ideas will be useful or not. So when you’re brainstorming and trying to turn out as many possibilities as you can, psychologists would call this originality, not creativity. It’s originality that is enhanced by positive moods. So when people are brainstorming ideas, good moods will help them come up with more ideas, all other things being equal. Remember the golden rule of brainstorming though: no idea is a bad idea. Just keep them coming and write them all down, review and analysis can come later.

    creativity and originality
    Van Gogh – troubled but creative

    Originality is usually tested through divergent thinking exercises, like the ‘Uses of a Brick’ test, where the researchers simply ask people to come up with as many uses for a brick as they can – no matter how silly. We tested this in class once, half of the class left to another room and watched a sad youtube clip, and the rest of us watched a happy one. Both groups did the Uses of a Brick exercises, those of us who watched the happy clip came up with more uses for a brick (my favourite one was ‘combing your hair’) – so the theory held up to our test.

    Creativity

    So what’s creativity then? Well, while originality is judged by the sheer number of ideas one can come up with, creativity places a more stringent criteria on these ideas – they not only have to be original, they have to be worthwhile or useful. So creativity is more beneficial than originality, but unfortunately it’s harder to measure, because the usefulness of an idea is not always immediately apparent.

    This is how creativity and originality are defined in psychology. This does not imply good moods are bad for creativity – only that there’s more going on in creative achievement than the simple generation of original ideas. Other things are being channelled into the work which make it useful, and of course when you’re talking about usefulness, difficult questions arise (useful for what? For whom?). But all the other factors involved mean that even although the tormented artist’s originality might be lowered to some degree due to less frequent positive emotions, this doesn’t necessarily mean she will also have lowered creative output.

    Reference:

    (1) Fredrickson, B. L. (2001). The Role of Positive Emotions in Positive Psychology. American Psychologist. 56 (3), 218-226.