Categories
science

Myth busting: metabolism while watching TV

I’ve been told this so many times, and it feels so right it should be true: your metabolic rate while watching television is lower than when you are unconscious. It should be true, but it isn’t

Buchowski MS, Sun M. (1996). Energy expenditure, television viewing and obesity.
International Journal of Obesity Related Metabolism Disorders. 1996 Mar;20(3):236-44.
Abstract: OBJECTIVE: To measure energy expenditure (EE) of television viewing, sitting, and resting and duration of self-selected television viewing in obese and non-obese men and women. DESIGN: Cross-over randomized study consisting of two separate 24-h stays in a whole-room indirect calorimeter. SUBJECTS: 123 obese and non-obese healthy men and women (age: 38 +/- 9, BMI: 29.4 +/- 7.9) MEASUREMENTS: Rates of energy expenditure during resting (RMR), sitting (EEsit) and television viewing (EEtv) using indirect calorimetry technique on two separate 24-h stays in a whole-room indirect calorimeter. Physical activities and work of body movements during these periods using a large force platform system located inside the calorimeter. RESULTS: Rates of EE for television viewing, adjusted for differences in body composition were 18% higher than resting metabolic rate (RMR), but similar to rates of other sedentary activities. There were no significant differences between obese and non-obese subjects in metabolic rates during resting, television viewing, and other sedentary activities. Average time of self-selected television viewing was significantly greater in obese than in non-obese subjects and also in women than in men. CONCLUSION: EE rate for television viewing in adults is higher than RMR and similar to other sedentary activities. Obese adults choose television viewing as a form of leisure activity more often than non-obese individuals and as a result they could significantly reduce other forms of physical activities and total daily EE.

Categories
psychology

Mind Shut Closed

Steve Johnson‘s Mind Wide Open gets a bad review. Although the review is great fun to read, it’s because it contains more about the review than the book. It concludes:

The idea that brain science is somehow going to do something which will “exceed the wildest dreams of poets and philosophers” is very light and very ignorant. It is, however, a characteristic idea of our time.

Which is true, as far as it goes, but he also says:

Equally, our minds work on the basis of myriad assumptions. If these are exposed as the deterministic workings of mere chemistry, then we might not even be able to get through the day, never mind the next million years.

which Paul Myers characterises well as

Well. I guess we’d better stop studying the brain then, shouldn’t we? Who knows, we might actually learn things about how it works that don’t involve angels or ghosts, and then people will get depressed.

The great thing about consciousness is it’s sheer obstinacy in the face of contradictory evidence. We don’t need to worry too much about the existential dangers of too much scientific information (the damage has already beeen done in that respect). We do need to worry about the social use, misuse and abuse of scientific information…But that’s another story.

Categories
links

Links

Linkloggery 3rd May 2004:

Categories
politics

charity efficiency

So someone suggested last night that Oxfam waste our money. The specific claim being (if i remember right) that ‘there was a report’ saying that even though they pay less than the commercial sector to their employees, and they use volunteers to do work for free, they are still an inefficient beaurocracy squandering cash in only the way well-meaning but incompetent lefties can.

Well, I couldn’t find any hint of this report by looking on the internet, although i did find this from Oxfam Ireland

We strive to keep our administration costs to an absolute minimum in order to ensure that the value of each euro/pound that you donate is maximised. During the 2002/2003 period, 90 cent/pence in every donated euro/pound went towards supporting our overseas programmes and campaigns work…When you make a donation to one of our Emergency Appeals, 100% of your donation goes directly to that Emergency relief effort…Did you know that for every pound or euro donated, there is the possibility of us raising a further four pounds or euros from other European (both government and other institutional) funding sources?

The annual report of Oxfam UK (the third biggest charity in the UK, incidentally) gives their accounts. So, next, I looked at this and the accounts for Cancer Research UK (who are the biggest charity in the UK) and two other international development charities – Christian Aid and Action Aid, comparing the total income, charitable expenditure and admin and management costs for each charity.

So Oxfam have about the same admin costs as other international development NGOs and about the same charitable spend as another charity of comparable size. But I guess a lot depends on what they include under ‘charitable spend’. This here is a pretty crude index of efficiency.

Simply put I don’t have the expertise to assess if, or if not, Oxfam are being more or less inefficient that anyone else. What they do, and the scale they do it at, makes comparisons difficult. My ignorance of the subject doesn’t help either. Does anyone have any advice or leads on this – i’d love to hear more about how to tell if a charity is spending money well?

This guy seems to have looked into it and to have been satisfied with what he found out. There’s an article about league tables of charity spending efficiency, and why they can be misleading, here, which seemed important.

For me I think the more important thing is what the money is being spent on (which is what I think Emily was getting at when she started the conversation and concluded by saying, “I just don’t want them spending my money on bibles” i guess). Given that Oxfam operates in 75 countries, provides emergency disaster relief but also – and this is the majority of their work – invests in long-term development work, including lobbying and policy work to challenge the institutions and structures which keep under-developed parts of the world under-developed, I’m going to continue giving them my money and not worry about the efficiency which which they spend it – it’s got to be better than not giving anything at all.

Oxfam International
The Trade Justice Movement

Categories
politics

‘You tell em Jack’

Spotted by/at alittlepoison.com:

George Bush, 21st September, 2001: ?Either you are with us, or you are with the terrorists?

Jack Straw, March 15th, 2004: ?the truth about these fanatics is that unless you are 100% with the terrorists, you are seen to be 100% against them.?

Categories
science

Something to be clever about

Richard Dawkins, writing for The Edge, says

In a 1968 book review of THE DOUBLE HELIX, anthologised in PLUTO’S REPUBLIC, the distinguished biologist Sir Peter Medawar wrote that if a
young man as talented as Jim Watson had been born British, especially in
the Cambridge of his and Crick’s time, he would have been steered towards
literary studies:

“It just so happens that during the 1950s, the first great age of molecular biology, the English Schools of Oxford and particularly of Cambridge produced more than a score of graduates of quite outstanding ability ?much more brilliant, inventive, articulate and dialectically skilful than most young scientists; right up in the Watson class. But Watson had one towering advantage over all of them: in addition to being extremely clever he had something important to be clever ABOUT.”

Categories
psychology

More on neural plasticity

Via http://www.cns.caltech.edu/~carlos/coolpapers/, a list of ‘cool scientific papers’:

Jennifer Linden (neuroscientist) wrote:
Here are my paper suggestions. It’s been years since I read these papers, but I still remember them — the experiment is truly beautiful. The background: Normally, each eye innervates a single tectum in the frog, with no competition between the eyes. The experiment: What happens when you implant a third eye in a frog, so that two eyes are forced to innervate the same tectum? The result: ocular dominance stripes, in an animal which normally doesn’t have them. A beautifully clean demonstration that ocular dominance stripes arise from competition between the two eyes, rather than from some kind of pre-established pattern of innervation.

Constantine-Paton, M. and Law, M.I., “Eye-specific termination bands in tecta of three-eyed frogs”, Science 202 : 639-641 (1978)

Law, M.I. and Constantine-Paton, M., “Anatomy and physiology of experimentally produced striped tecta”, Journal of Neuroscience 1 : 741-759 (1981)

Categories
quotes

Quotes #21 and #22

Taking about the transition from naive ignorance to profound ignorance in the pub last night, this quote came up :

Before I had studied Zen for thirty years, I saw mountains as mountains, and waters as waters. When I arrived at a more intimate knowledge, I came to the point where I saw that mountains are not mountains, and waters are not waters. But now that I have got its very substance I am at rest. For it’s just that I see mountains once again as mountains, and waters once again as waters.

– Ch’ing-y?an

The quote reminded me of a Chinese poem which touches upon the same distinction

Mount Lu in misty rain; the River Che at high tide.
When I had not been there, no rest from the pain of longing!
I went there and returned…. It was nothing special:
Mount Lu in misty rain; the River Che at high tide.

Both are in Alan Watts’ book The Way of Zen

Categories
psychology

The Sensory homunculus

From the Natural History Museum picture library, a sensory homunculus:

This model shows what a man’s body would look like if each part grew in proportion to the area of the cortex of the brain concerned with its sensory perception.

To see which areas of cortex map to which body parts use the interactive motor/sensory homunculus mady by Jaakko Hakulinen (IE only i think, sorry).

Categories
technical notes

WEFT

Here’s how to tell if your browser supports Microsoft’s Web Embedding Fonts Tool (WEFT). Mine (Mozilla Firefox) doesn’t. If this page looks special, then you are seeing embedded fonts:
http://www.microsoft.com/typography/web/embedding/demos/3/demo3.htm

There’s an image of what it should look like if WEFT is working here

Categories
psychology

The nature of memory

A post from Onemonkey, Context is everything, on the perpetual construction and reconstruction of memory and the research findings of Susan Engel.

From the outset our so-called episodic memories act in ways far removed from the faithful verbatim recording we often feel we’ve experienced….[Children] only really relive the past when prompted to do so, and rely heavily on confirmation and elaboration from the adult or their peers. And when they tell these stories to others and later to themselves, the world is seen through [the distorting lens of their limited linguistic capacities].

Categories
psychology

Environmental enrichment causes critical period closure of visual plasticity for dark-reared rats

This seemed important:

Environmental enrichment prevents effects of dark-rearing in the rat visual cortex
Nature Neuroscience, March 2004 Volume 7 Number 3 pp 215 – 216
Alessandro Bartoletti, Paolo Medini, Nicoletta Berardi & Lamberto Maffei
Abstract: Environmental enrichment potentiates neural plasticity, enhancing acquisition and consolidation of memory traces. In the sensory cortices, after cortical circuit maturation and sensory function acquisition are completed, neural plasticity declines and the critical period ‘closes’. In the visual cortex, this process can be prevented by dark-rearing, and here we show that environmental enrichment can promote physiological maturation and consolidation of visual cortical connections in dark-reared rats, leading to critical period closure.

Presumably because environmental enrichment encourages cannibalisation of the proto-visual areas by other functions. Another tale of activity dependent neural development…

Categories
politics

‘An experiment in consumerist identity’

In February 2001 Michael Landy destroyed all his possessions. Every single one. This act of annihilation, entitled Break Down, took fourteen days to complete and cost approximately ?100,000….Landy spent three years cataloguing the 7,006 separate items. Each object was numbered, separated into a category and included in a long list displayed on the walls. The smaller objects were bagged in plastic and placed in yellow crates that snaked along 160 metres of conveyor belt around four dismantling bays. Landy and his team of operators, all clothed in industrial blue overalls, systematically reduced each item down to its basic components. The pieces were then shredded or granulated and bagged up.

(from BBCi arts)

Landy says:

The happiest day of my life

Categories
quotes

Quote #21: On the road

It’s just the only place a man can go, When he don’t know where he’s travelin’ to
– Steve Earle on the road, and Townes Van Zandt

Categories
quotes

Quote #20: Erdos on publishing

“Non numerantur, sed ponderantur”
(They are not counted, but weighed)

Categories
politics

Our glorious leader

U.S. President George W. Bush looks up before speaking at the Davos Performance Hall in Grand Rapids, Michigan, January 29, 2003. Traveling a day after his State of the Union address, Bush spoke here of his plan to offer prescription drug benefits and catastrophic illness coverage to seniors as inducements to give up their fee-for-service Medicare benefits and enroll in private plans. Bush also talked about the situation in Iraq. 29 Jan 2003 REUTERS/Kevin Lamarque

Categories
quotes

quote #19 : die knowing something

Stare. It’s the way to educate your eyes. Stare, pry, listen, eavesdrop. Die knowing something. You are not here long.

– Walker Evans

Categories
science

The death of Bacon, by Chicken

I’ve just found out how the father of modern science died. It was, fittingly, in the pursuit of knowledge. In March of 1626, Bacon took advantage of wintry conditions and stuffed a chicken with snow, in an attempt to research the effects of freezing on putrefaction. He became ill from exposure to the cold and died of pneumonia on April 9, 1626.

An admirable death!

Categories
quotes

quote #18

Do not ask what the world needs. Ask what makes you come alive. For what the world needs is more people who have come alive.

– Howard Thurman or Harold Whitman, depending on which bit of the web you look for the source.

Categories
science

The Panda’s Thumb

The Panda’s Thumb: The Panda’s Thumb is dedicated to explaining the theory of evolution, critiquing the claims of the anti-evolution movement, and defending the integrity of science and science education in America and around the world.. (via Corante/loom).

Categories
psychology

Orality and Literacy

If you enjoyed Relevant History on word spacing (and you should have) or me on the invention of perspective you must read Walter Ong’s Orality and Literacy. I can’t do the erudition, sweep and profundity of the book justice, but here’s a few quotes. You’ll have to excuse me if I leap to the conclusions rather than pr?cis the arguments here. My thoughts are preceded by a !, everything else is a quote, paraphrase or summary of Ong.

Walter Ong (1982,2002) Orality and Literacy – The Technologizing of the Word. Routledge, New York.

Writing makes words appear to be things. In oral culture words have no residue, they are just potential. They only exist in transience. The visual form of words gives you control over them. Without stable form they are spectres – always actions, always transient, always willed – intrinsically agenic. (p14)

When and often-told story is not actually being told, all that exists of it is the potential in certain human beings to tell it (p11)

In oral cultures you only know what you can recall – in literate cultures you know what you can look up. Formulas and themes are central to oral culture, for they provide structure for works which rely upon human memory to persist. By removing this constraint, literacy unleashes chaos on knowledge.

Writing separates the knower from the known and thus sets up conditions for ‘objectivity’ p45

oral societies live very much in a present which keeps itself in equilibrium or homeostasis by sloughing off memories which no longer have present relevance

Table summarising Chapter 3: Some psychodynamics of orality

oral
literate
words as actions words as objects
formulaic unstructured/multiple
additive subordinative
harmonising analytic/dissective
redundant sparse
narrative facts & lists
episodic/thematic chronological
ever-present past and future looking
amnesic hypermnemonic
‘savage mind’ rationality
animistic objective
holistic linear
conservative progressive
unreflective introspective
social/public individual
empathetic & participatory objectively distanced
situational/situated abstract
contextual self-contained
restricted code elaborated code

! It is impossible not to note at this point how the features of oral culture are those idealised by the environmental and new-age movements.

! While literate knowledge is abundant, oral knowledge (‘ancient wisdom’) is concentrated. Single items – koans, kata, poems, rituals, icons – physically embody depth of information and can reveal it to the individual through study of that single thing (compare: knowledge is explicit, in multiple sources, and the individual can collect that information by acquiring, ie reading, those sources).

The ‘restricted’ linguistic codes of primarily oral cultures are just as specific and expressive, but much content is embedded in the context the language is used in. The ‘elaborated codes’ of text-based culture have their meaning rooted within the language itself.

! Note the paradoxical nature of creation myths of pre-literate cultures (eg Norse or Ancient Greek) – pre-literate cultures are ever-present. They do not see the need for creation ab nihilo, so the writing down of these myths makes them seem nonsensical (ie illogical). The great, later, religions – with their sacred texts – are only possible because of the development of literacy and the grafting of a new literate form on top of passing oral cultures.

Is the idea of a Jaynesian software rewrite of self-consciousness subsumed within the idea of a transition from oral to literate culture? (p28)

By separating the knower from the known…writing makes possible increasingly articulate introspectivity, opening the psyche as never before not only to the external objective world quite distinct from itself but also to the interior self against whom the objective world is set (p104)

Because spoken language is necessarily shared, it promoted groupness. Language is only what can be mutually understood. Reading is done individually. Literate culture promotes individuality and introspection. In writing the audience is always imagined (simulated) rather than actual.

Self-analysis requires a certain demolition of situational thinking. It calls for isolation of the self, around which the entire lived world swirls for each individual person, removal of the center of every situation from that situation enough to allow the centre, the self, to be examined and described.

By removing words from the world of sound where they first had their origin in active human interchange and relegating them definitively to visual surface, and by otherwise exploiting visual space for the management of knowledge, print encourages human beings to think of their own interior conscious and unconscious resources as more and more thing-like, impersonal and religiously neutral. Print encouraged the mind to sense that its possessions were held in some sort of inert mental space (p129)

! Writing is a cognitive technology for transforming meaning across sensory codes. It takes what defines human uniqueness and subsumes it to work in our most powerful modality. This raises the question of what kinds of operation are best subserved by audition. I suggest associative recall (the chaining of items in sequences) – note that the order of the alphabet is learn auditorially but employed visually (in indexes)!

What’s amazing is that our cognitive abilities have coped so well with such a radical technological hybridisation. It’s as astounding as the fact that we can live in cities of millions when we evolved to live in tribes of hundreds.

The present-day phenomenological sense of existence is richer in its conscious and articulate reflection than anything that preceded it. But it is salutary to recognise that this sense depends on the technologies of writing and print, deeply interiorised, made part of our own psychic resources. The tremendous store of historical, psychological and other knowledge which can go into sophisticated narrative and characterisation today could be accumulated only through the use of writing and print (and now electronics). But these technologies of the world do not merely store what we know. They style what we known in ways which made it quite inaccessible and indeed unthinkable in an oral culture.

! So, back to my original compulsion – how was inner life experienced before the ascendancy of individual perspective? At the very least the articulation of that experience couldn’t have occurred in the way is does now. If a tree falls in the forest and nobody hears, does it make a sound? If a qualia cannot be articulated, is it experienced?

I feel like I?ve reached the end point of this question?s productivity. Which isn?t to say that it is answered, but rather that the question will have to be changed to go forward.

Categories
science

peadophiles, the turing test and Bad Science

I had stopped reading the Guardian’s Bad Science on thursday’s. The two most recent columns from Ben Goldacre (first, second) convince me I should start again. (thanks to Andy for this).

Categories
misc

Victoria station at rush hour

If you stand on Victoria station at rush hour there are more people in your field of view than most people, for most of human history, would have met in their entire lives. In ten minutes more people walk passed you than the sum population of the human species at its narrowist bottleneck.

All in all, I think we’re coping remarkably well.

Categories
quotes

Quote #17

“Love! Shall I tell you what love is? Love is suffering!

– Fyodor Dostoyevsky in The Gambler

Categories
quotes

Quote #16

The availability of good coffee has become more important than the availability of democracy.

– Michael Leunig

Categories
quotes

Quote 15: Hanlon’s Razor

Hanlon’s Razor:
Never attribute to malice that which can be adequately explained by stupidity

(this from the very interesting MeatBall Wiki)

Categories
misc

Note to self: wear hats more often…

Categories
quotes

Quote #14

Reading maketh a full man,
conference a ready man,
and writing an exact man.

Francis Bacon (1561-1626) ‘Of studies’

Categories
systems

The Invisible College

monkeymagic.net says some considered, interesting, important things on Echoes in the Invisible College. I so want to be able to see five years into the future to find out what conclusions all the current thinking about the influence of social structure on group cognition will produce…

Categories
psychology

neuroanatomical orientation

Not only do different people call different structures in the brain by different names, depending on which classificatory scheme they use and which species they mainly invesitgate, but also the different structures are all heirarchically organised so that any given structure is probably also part of several supa-structures and will contain a number of sub-structures.

Help is at hand.

This is a basic crib sheet for the basic terminology on prefixes, directional terminology, etc

BrainInfo is great for definitions of areas, showing where they are in the heirarchy, what else they are called and what else they contain.

And the Whole Brain Atlas is another great resource for orientating yourself.