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Posts Tagged science & society

caesarians & medical hypotheses Alison Campbell Apr 01

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Many moons ago I used to do the occasional talk for Parents Centre ante-natal classes, on what to expect during a caesarian delivery. (I’d experienced an emergency C-section, so was happy to let others know what was involved.) So it was to be expected that this op.ed piece in today’s NZ Herald (in the “Life & Style” section) would catch my eye. Initial interest turned to a thought that perhaps I was reading a spoof (check the date), but the paper described in this article does exist.

In January 2012 we brought together eleven researchers (midwives, scientists, epidemiologists, geneticists and epigeneticists) at the University of Hawaii and developed the EPIIC Hypothesis, which has just been published in Medical Hypothesis.

I did wonder in passing why epidemiologists & geneticists weren’t counted as scientists, but what stood out is the fact the paper was published in Medical Hypotheses. (Being charitable, I’ll assume the mis-spelling occurred in the editorial process.) In other words, there’s no requirement to present any data in support of the hypothesis under discussion.

We have known for a while now that caesarean section is linked to longer-term health implications for the child…

As one of the commenters on the Herald piece points out, correlation is not the same as causation. Surely the researchers are aware of this?

We hypothesise that events during labour and birth – specifically the use of the synthetic hormone oxytocin, along with antibiotic use and caesarean sections – affect the epigenetic remodelling processes and the subsequent health of the mother and child.

Oxytocin is produced in large quantities during a normal labour; what would be the impact of that on epigenetic changes around the time of birth? In fact, the authors point the finger at more than (synthetic) oxytocin & C-sections, including forceps & vacuum-assisted deliveries as those potentially exerting a harmful effect. In describing this hypothesis, the op.ed. writer seems to be ignoring the fact that in at least some cases not using those interventions could result in the considerably more harmful outcome of death for mother &/or child. (To be fair, things are narrowed down somewhat in the MH paper.)

In the EPIIC hypothesis, we propose that physiological labour and birth have evolved to exert eustress (a healthy, positive form of stress) on the fetus, and that this process has an epigenomic effect on particular genes, particularly those that programme immune responses, genes responsible for weight regulation, and specific tumour-suppressor genes.

This is an interesting use of the term ‘eustress’, since its definitions suggest that whether or not stress is ‘healthy’ depends on how the individual perceives that stress, & whether they are left with a ‘feeling of fulfilment’ after experiencing it. At what point would a ‘normal’ labour cease to be so, & start generating ‘non-healthy, negative’ forms of stress?

And how would this hypothesis be tested? The Medical Hypotheses paper (sorry; it’s behind a paywall) does suggest a possible research program: essentially a long-term project tracking outcomes in individuals who birth experiences range from

home births in the most familiar environment to the woman and without medical interventions … to those born after elective caesarean section for breech presentation where there are no underlying medical complications…

and including

various ethnic groups, gestational ages, maternal ages and socioeconomic backgrounds.

With so many variables listed, proper data collection & analysis would be an extremely complex task. There is no mention of how this might be properly blinded. And – as that same Herald commenter says – why not go for an animal model first? And publish the results in a mainstream journal?

chocolate! & just in time for easter Alison Campbell Mar 27

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For years the husband has insisted that chocolate is a health food. He’s also spun me the line that eating it is good for the rainforest, as the mature cacao trees apparently grow in mature forest. So he’ll be happy with the Herald‘s story on his sweet treat, which has the enticing title of “Sweet news: chocolate is good for you”, and comes direct from the Daily Mail, that fount of all things good in science reporting. (Not.)

Me? Not so much. Like cautious investors, I tend to subscribe to the view that if something sounds too good to be true, it probably is.

The item begins:

Just in time for Easter, it’s the news chocolate lovers have dreamt of – official confirmation that their favourite guilty pleasure can be good for you.

New research shows that eating just a single chocolate bar has a direct effect on the brain and may cut the risk of stroke.

The research on which the Daily Mail‘s story is based was published last week in the journal Neurology, to which – alas! – we don’t have a subscription. The brief excerpt I can see indicates that the researchers were building on an earlier publication:

Larsson et al. investigated the association between chocolate consumption and risk of stroke in men, concluding that moderate chocolate consumption may lower the risk of stroke. We performed a prospective mechanistic study that may suggest a potential mechanism for this observation.

A prospective study is one that takes a group of individuals & follows them for some period of time, studying the impact of various factors on that group; ‘mechanistic’ means that the researchers would be looking to explain their findings in terms of physical or biological causes. In this case they were interested in the impact of eating chocolate, & apparently found that this had an impact on blood vessels; specifically, on the stiffness of the vessel walls. It would be interesting to read the actual paper because I’d like to know, for example, which blood vessels were studied, & how they determined the ‘impact’ of chocolate on brain cells. It’s notable that there’s no indication of what constituent of chocolate might be involved in any possible outcomes, so it’s a very broad-brush, preliminary outcome.

In its timing this mirrors an earlier story, published just before Easter 2010. However, the 2010 story is much more balanced in scientific terms, pointing out the shortcomings of the earlier research (and that most newspapers Got It Wrong) & noting that while it was possible that eating a small quantity of chocolate might confer some benefit, the association between choccy consumption & health wasn’t particularly strong. (And in fact, reported chocolate consumption appeared awfully low – the ‘high intake’ group reported eating a mere 7.5g/day!)

In this week’s Daily Mail story, the lead researcher is quoted as saying that

We think a reduction in stroke risk may be caused by chocolate changing how brain blood vessels behave.

It’s a real pity that the DM left this next part of the message until the very end of the tale, but at least the paper does note that

chocolate also has a high sugar and fat content which can cause obesity – a definite risk factor for strokes.

Sounds like swings & roundabouts to me. I hate to dash the husband’s hopes, but it would be a leetle premature to add this putative benefit to his list of reasons to eat his favourite Whitaker’s bar :(

a cheer for saccharomyces cerevisiae Alison Campbell Mar 17

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Here’s another of those catchy science-based ditties – & definitely one I’ll be adding to my collection for showing in class :) (I would have embedded it, but MT is not doing what it should today…later edit: thank goodness for IT wizards!)

 

And a happy St Patrick’s day!

"the aviator" – a vision of the future that’s a little too close for comfort Alison Campbell Jan 09

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I found the Herald’s front page this morning a sad and depressing read. My heart goes out to all those affected in some way by the terrible bush fires ravaging so much of Tasmania, Victoria, & New South Wales.

I also had a certain sense of deja vu as I read of the fires – for I’d read something similar last year, in blog-buddy Gareth’s book The Aviator, Book One of the Burning World series. Except that in the book, the scale of events is much greater than is (thankfully) the case at the moment, and Melbourne is destroyed by a fire storm. Gareth’s vision of a not-too-distant future in which our global ecosystems have been irreparably affected by anthropogenic greenhouse warming, is both an alarming foretaste of how things could become**, and a rather good read (another blogging friend, Ken Perrott, reviewed the book very favourably when it first came out, & I’ve been meaning to write my own review for quite a while). The story follows the key character (& narrator – well, one of them), an airship pilot called Lemmy, in his travels around a world in which ecosystems and societies have collapsed, or changed – in many instances, beyond recognition. (There are actually 2 narrators: the second is Jenny, the artificial intelligence who actually runs the airship. Their commentaries alternate, & it’s interesting to see the differences in perspective, especially given that the AI is to some degree self-aware.)

As the series title suggests, in this future world it’s not only Australia that suffers from fire. Lemmy also witnesses huge fires in the Arctic, where massive methane deposits originally locked under the ocean in the form of methane clathrates have been ignited and the flames burn seemingly endlessly. I’ve recently read more about these deposits in Bill McGuire’s Waking the Giant: we are talking significant carbon stores here, at around 2000 billion tonnes of carbon trapped in the form of clathrates: something that is highly attractive to energy companies & of deep concern to climate scientists.

The first time I read The Aviator, I thought it would be a rather good classroom resource for senior students. And that hasn’t changed on a subsequent re-reading. Its engaging focus on a current, extremely relevant topic means that the book could be used in many different areas as the basis of discussion and to provoke further student research: how do individuals, and societies, cope with change? What happens when the technologies we rely on so heavily are no longer available, or are concentrated in the hands of relatively few people? How would a rise in average global temperature affect various ecosystems? Is a future such as the one Gareth describes, something that we can yet avoid?

Highly recommended.

 

Gareth Renowden (2012) The Aviator (The Burning World). Limestone Hills Ltd.

Bill McGuire (2012) Waking the Giant: how a changing climate triggers earthquakes, tsunamis, and volcanoes. Oxford University Press. ISBN 978-0-19-959226-5

 

** In some ways it reminds me of Richard Cowper’s The Twilight of Briareus - though having said that, Cowper’s world has been sunk into an ice age, and his story has a strong mystical feel to it. But the themes of societal and ecological break-down, and how people cope with these, are common to both books.

 

 

 

 

talk nerdy to me Alison Campbell Oct 17

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Grant’s talked quite a bit about TED talks. This one’s a cracker: Melissa Marshall talking about science communication. Important point for scientists: clear, careful explanations of what we’re doing =/= ‘dumbing it down’!

And thanks, Annette, for passing it on :)

academic olympics fail to gain government support Alison Campbell Aug 16

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This is a guest post – I’m running it on behalf of my friend & colleague Dr Angela Sharples. Angela is the current chair of OlympiaNZ (the umbrella organisation for the various NZ Olympiad committees) and leads NZ International Biology Olympiad. She received the Prime Minister’s Science Teacher Award in 2011.

At a time when we celebrate all things sporting we should reflect on our attitudes towards success in all forms of endeavour in New Zealand. The Olympics showcase the world’s best in sporting endeavour and we rightly look up to these elite athletes and admire the effort and dedication it took for each and every one of these athletes to reach the top of their field. The personal attributes required for them to even participate at the Olympics are transferable to all areas of performance in life and so we celebrate these athletes, admire them and aspire to like them. They are role models that encourage younger athletes from primary school to university level to participate in the sport of their choice and to dream that with hard work and dedication they too may reach Olympic level.

The government recognises this social benefit of elite sports and funds it accordingly, through SPARC and the high performance programmes. They have their eye on the long term benefits that participation in sport at the elite level provides to the wider New Zealand community. The government also recognises that New Zealand must foster innovation through a responsive, high performance education system if New Zealand is to remain globally competitive in a rapidly changing world.  Unfortunately, whilst the government has
published any number of reports on the importance of Science and innovation in New Zealand we see very little action on establishing and supporting programmes which foster such excellence.

Just last week, the New Zealand International Biology Olympiad withdrew from hosting the International Biology Olympiad here in New Zealand in July 2014. This prestigious international event challenges and inspires the brightest young secondary school students from 60 countries (and the number of member countries continues to grow) to deepen their understanding of biology and promotes a career in science. The focus is on the importance of biology for society, especially in areas such as biotech, agriculture and horticulture, environmental protection and biodiversity. These are all areas of academic endeavour crucial for New Zealand’s economic success in the future. Hosting this event in New Zealand was a chance to showcase our innovative education system and biological research to some of the world’s top academics and to inspire our own students to develop the dedication and put in the sheer hard work required to reach this highest level of academic endeavour. It is an opportunity lost!

Unlike our sporting Olympians our academic Olympians receive little support from the government and even less acknowledgement and celebration of their success. New Zealand has performed outstandingly well in the International competitions since we first competed in 2005, winning 16 Bronze medals, 7 Silver and 1 Gold Medal. These high performing students are New Zealand’s economic future and yet few in the country are even aware of their achievement.

Until we apply the same high performance strategies to our science and innovation system in New Zealand that we utilise in sports we will continue to talk about the importance of fostering excellence in science and innovation whilst we watch our competitors on the global stage outperform us. And we will continue to lose our best young minds to countries where their contribution is valued.

reflections on the WEB days Alison Campbell Jun 13

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We’ve just held the second day of the annual “Waikato Experience of Biology” (WEB) days – around 700 year 13 biology students, & their teachers, have come on campus over those 2 days for a program of seminars + some lab experience that supports their learning in several areas of their Biology curriculum. (There are photos on the Faculty’s Facebook page.) I give seminars on human evolution & other colleagues talk about gene expression, patterns of evolution, biotechnology, and plant responses/animal behaviour.

The students were great – it’s always fun to spend time talking with young people about biology :-) They were also a credit to their schools – when you’ve got a lecture theatre full of 400 year 13 students, & absolutely no issues with noise or chatter during a talk, then that speaks volumes.

I spoke with a lot of the attending teachers as well, just catching up & making sure that we had things pitched at the right level & were meeting their needs & those of their students. (It sounded like we had things pretty much spot-on.) But we also talked about the impending implementation of the new  (‘aligned’) Achievement Standards at Level 3 – this is the last year that gene expression will be taught & examined at that level, for example, as it’s moving down to year 12 & in its place comes a new AS on homeostasis, and another on ‘human manipulation of genetic transfer’ which seems a more tightly focused version of the previous standard on biotechnology.

And it became quite clear that many of those I spoke with were concerned at how well they were going to be able to deliver this new content & develop their students’ understanding of it. One of the things we’ll be doing here at Waikato to support them is running a teacher evening to provide ideas, content knowledge & maybe other resources. If you’re a scientist with an interest in, say, homeostasis (or cloning, or transgenes), and an interest in communicating the science around it, why not contact the HoD Biology at your local secondary school and offer to help? It could be the start of a wonderful new working relationship :-)

in the rush to ‘e-learning’, are we losing sight of our goals? Alison Campbell Feb 27

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One of the ‘big things’ in schools these days seems to be the increasing expansion of e-learning. I’ve written previously on one school’s decisionto require all its new students to have iPads, or similar tablet-style computers. At the time I worried about whether, in the rush to embrace new technology, the question of whether its use would enhance student learning was being left behind. And a friend of mine who’s a secondary teacher recently said something similar: these technologies can be tools for learning but do not & should not replace the need for linking our teaching to a student-inquiry-based experiential and cognitive-conflict-based learning (which requires a lot of forethought & planning from teachers!).

That concern resurfaced yesterday as I was reading the NZ Herald‘ on-line edition (on my iPad, lol), & found one story citing a couple of US reports suggesting that perhaps e-learning isn’t all it’s cracked up to be.

The first of the Herald‘s references was to this report at Education News Colorado, which examines the performance of students who are taught entirely on-line (for a range of reasons, that could include having dropped out of “regular” schooling, living in an extremely isolated area, or for philosophical reasons. At this point I need to note that the news report is based on an analysis of on-line school data, & so far doesn’t appear to have been published in the science education literature. (However, the Colorado Department of Education annual report, from which the data are drawn, can be found here.) Nonetheless, the analysis does appear to highlight some rather worrying trends:

Online students are losing ground. Students who transfer to online programs from brick-and-mortar schools posted lower scores on annual state reading exams after entering their virtual classrooms.

Academic performance declined after students enrolled in online programs. Students who stayed in online programs long enough to take two years worth of state reading exams actually saw their test results decline over time.

Wide gaps persist. Double-digit gaps in achievement on state exams between online students and their peers in traditional schools persist in nearly every grade and subject — and they’re widest among more affluent students.

Now, one reason put forward by education officials for the apparently wide differences in results was that on-line education was pretty much an option of last resort, & certainly at least one Colorado virtual school does appear to target at-risk students who may well be behind on many educational indicators. However:

The analysis of state data shows, however, that most online school students do not appear to be at-risk students. Only about 120 students of the more than 10,000 entering online programs last year were identified as previous dropouts returning to school, and only 290 entered online schools after spending the prior year in an alternative school for troubled youth.

The obvious question is, why? Because there does appear to be something going on. And it’s relevant to NZ even though fully on-line teaching is a long way from the use of iPads & their like in a bricks-&-mortar classroom: we’re still looking at two stages on a continuum here.

Part of it could be that kids are not really as tech-savvy as we’d like to think. Putting them in front of a desktop computer, or giving access to things like tablets, doesn’t mean that they’ll necessarily use the technology to its best advantage. They may well need to learn that skill. And those using the technology to teach also need to think about how well it fits their learning objectives – is it there because it’s “there”, or because it enhances learning in some way?

Coming back to the full-blown exclusively on-line learning thing: there are also issues of community & pedagogy. In a real (as opposed to virtual) school, students are part of an actual community that includes both their peers & their teachers, & which can extend into the community outside of school. It can be rather isolating to be a distance student, & not be a part of that (this was certainly my experience when I was studying extramurally for my teaching qualification). And maybe that can have an effect on learning.

Which is where the pedagogy comes in. Certainly from a university perspective,we haven’t always been terribly successful at moving from the face-to-face to the on-line teaching environment. However, technologies like vide0-conferencing, skype, moodle & panopto can help to give some sense of belonging to a learning community – as can tailoring teaching materials to this alternative means of teaching & learning, instead of simply uploading everything in the format that’s used in ‘normal’ classes. Are some of the students in the Colorado study missing out on that sense of community?

And the Herald‘s second reference? It was to this story (from September 2011) in the New York Times, which carried out what looks like a fairly extensive investigation on the use of technology in schools, before concluding that

schools are spending billions on technology, even as they cut budgets and lay off teachers, with little proof that this approach is improving basic learning.

Now, that’s talking about the current status quo in parts of the US. New Zealand’s a long way back from what the NYT is describing, both in the extent of our technology roll-out & in the amount of money we have available for it. And the research into the effectiveness of on-line teaching & learning is certainly being done (here,here, and here, for example). (There’s also an interesting review of ‘virtual schools’ available here, which uses New Zealand as one of its examples.)

But still: technology, in education as elsewhere, is a useful tool, but not necessarily a panacea for all ills.

anti-vaccination anti-science Alison Campbell Feb 25

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At Respectful Insolence, Orac has a recent post discussing ‘anti-science’, and I thought of this when I finally got around to writing this piece (which Grant has kindly ‘left to me’, as it were!). Here’s how Orac defines the term ‘anti-science’:

It’s an imperfect term for people who reject well-established science. To get a flavor of what being “anti-science” means, take a look at people who reject evolution, reject anthropogenic global warming, reject vaccines, and reject scientific medicine in favor of quackery.

Which is a reasonable characterisation of some of the content from the IAS website that Grant’s deconstructed, leaving this bit for me (because I asked nicely):

When a well meaning friend or relative questions your decision [not to vaccinate], simply say “I fail to see how injecting heavy metals, foreign proteins, multiple viruses and many toxic substances into a body all at one time can keep someone well, can you explain it to me?”

“Heavy metals”: could they mean (gasp!) mercury? It’s hard to tell, with such a non-specific term. But if they do mean mercury, then this phrase can only be construed as intending to mislead: mercury (as thiomersal) was phased out of New Zealand’s paediatric vaccines in 2000. In reality, the “heavy metals” actually include some elements that are required for life (such as iron, molybdenum, & cobalt) as well as the harmful ones like lead & plutonium – and mercury.

Dose & chemistry also matter. When childhood vaccines in NZ did have thiomersal in them, the mercury was in the form of the organic compound ethylmercury. Unlike methylmercury, ethylmercury has a half-life in the body of around 7-10 days: it is converted to an inorganic form & then excreted. As for dosage, back when our vaccines contained ethylmercury, a 6-month-old child who had received all recommended vaccines would have received a grand total of 175 micrograms of this substance, well below World Health Organisation guidelines.

‘Foreign proteins”? Which ‘foreign’ proteins are we discussing here? Presumably it’s the antigens included in vaccines to elicit an immune response. Which are no more, & no less, ‘foreign’ than the self-same proteins on the surface of a bacterium or the coat of a viral particle. In any case, it’s worth remembering that proteins & large polypeptides from food can cross the gut wall to circulate in the bloodstream, & they’re equally ‘foreign’.

“Multiple viruses”? It’s correct that some vaccines contain viruses. “Live” vaccines contain viruses that are attenuated but which stimulate an immune response in the host. Examples are measles, mumps, rubella, & chickenpox. “Inactivated” viral vaccines (eg for polio & influenza) have had their ability to replicate destroyed – this further reduces the extremely small risk of a “live” vaccine inducing disease, but requires much higher doses to elicit the same immune response. There are also vaccines based solely on viral protein subunits.

Let’s assume that the IAS’s “multiple viruses” refers to the MMR vaccine. Three viruses at once – sounds bad! However, viruses are extremely common in many indoor environments, so daily exposure to viral particles may be many orders of magnitude greater than the 3 in that particular vaccination. Many pathogenic viruses are airborne, entering the body through mucous membranes, and some can persist for up to several months on dry surfaces. Overall, an individual’s daily exposure to antigens is many orders of magnitude greater than exposure via vaccines.

As for the “many toxic substances” part (oh noes, teh ebil toxins!) – it’s notable that many of those who cite the presence of toxins appear quite unable to identify what they are. The term ‘toxins’ is presumably sufficiently scary to put hearers off asking for elucidation. At a guess, IAS might be referring to formalin, squalene, & or aluminium. However, once more dose is important. None of these are toxic at the concentrations found in vaccines – in the case of aluminium daily exposure through food & drink is far higher (hardly surprising when you consider that it’s one of the most abundant elements in the earth’s crust). And our bodies make both formalin (formaldehyde) & squalene as part of their normal metabolic functioning.

So, sad to say, that particular anti-vaccine website could fairly be characterised as anti-science.

have universities degraded to teaching ‘only’ scientific knowledge? Alison Campbell Feb 20

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The title for this post is taken from one of the search terms used by people visiting my ‘other’ blog (the one I share with Marcus & Fabiana), Talking Teaching. It caught my eye & I thought I’d use it as the basis of some musings (which are re-posted here).

We’ll assume that this question is directed at Science Faculties :-) Using ‘degraded’ suggests that a university education used to provide more than simply a knowledge base in science. (If I wanted to stir up a bit of controversy I could say – oh, OK, I will say – that it’s just as well that they ‘only’ teach scientific knowledge, however that’s defined. My personal opinion is that the teaching of pseudoscience (eg homeopathy, ‘terapeutic touch’ etc) has no place in a university, & it’s a matter of some concern that such material has appeared in various curricula eg in the US, UK & Australia. Why? Because it’s not evidence-based, & close investigation – in one case, by a 9-year-old schoolgirl – shows that it fails to meet the claims made for it. You could teach about it, in teaching critical thinking, but as a formal curriculum subjet? No way.)

Anyway, back to the chase. Did universities teach more than just ‘the facts’, in the past? And is it a Bad Thing if we don’t do that now?

I’ll answer the second question first, by saying that yes, I believe it is a Bad Thing if all universities teach is scientific knowledge – if by ‘knowledge’ we mean ‘facts’ & not also a way of thinking. For a number of reasons. Students aren’t just little sponges that we can fill up with facts & expect to recall such facts in a useful way. They come into our classes with a whole heap of prior learning experiences & a schema, or mental construct of the world, into which they slot the knowlege they’ve gained. Educators need to help students fit theri new learning into that schema, something that may well involve challenging the students’ worldviews from time to time. This means that we have to have some idea of what form those schemas take, before trying to add to them.

What’s more, there’s more to science than simply ‘facts’. There’s the whole area of what science actually is, how it works, what sets it apart from other ways of viewing the world. You can’t teach that by simply presenting facts (no matter how appealingly you do this). Students need practice in thinking like a scientist, ‘doing’ science, asking and answering questions in a scientific way. And in that sense, then I would have to say that I think universities may have ‘degraded’. Until very recently, it would probably be fair to say that the traditional way of presenting science to undergraduates, using lectures as a means of transmitting facts and cook-book labs as a means of reinforcing some of those facts (& teaching practical skills), conveyed very little of what science is actually all about. And it’s really encouraging to see papers in mainstream science journals that actively promote changing how university science teaching is done (here, here, & here, for example).

Of course, saying we’ve ‘degraded’ what we do does make the assumption that things were different in the ‘old days’. Maybe they were. After all, back in Darwin’s day (& much more recently, in the Oxbridge style of uni, anyway) teaching was done via small, intimate tutorials that built on individual reading assignments & must surely have talked about the hows and the whys, as well as the whats, of the topic du jour. However, when I was at university (last century – gosh, it makes me feel old to say that!) things had changed, and they’d been different for quite a while. Universities had lost that intimacy & the traditional lecture (lecturer ‘transmitting’ knowledge from up the front, & students scrabbling to write it all down) was seen as a cost-effective method of teaching the much larger classes that lecturers faced, particularly in first-year. In addition, the sheer volume of knowledge available to them had increased enormously, & with it, the pressure to get it all across. And when you’re under that pressure to teach everything that lecturers in subsequent courses what students to know before entering ‘their’ paper, transmission teaching must have looked like the way to go. Unfortunately, by going that route, we’ve generally lost track of the need to help students learn what it actually means to ‘do’ science.

Now, those big classes aren’t going to go away any time soon. The funding model for universities ensures that. (Although, there’s surely room to move towards more intimate teaching methods in, say, our smaller 3rd-year classes? And in fact I know lecturers who do just that.) But there are good arguments for encouraging the spread of new teaching methods that encourage thinking, interaction, & practicing a scientific mindset, even in large classes. Those papers I referred to show that it can be done, and done very successfully.

First up: there’s more to producing a scientifically-literate population than attempting to fill students full of facts (which they may well retain long enough to pass the end-of-term exam, & then forget). We need people with a scientific way of thinking about the many issues confronting them in today’s world. Of course, we also need a serious discussion at the curriculum level, about what constitutes ‘must-have’ knowledge’ and what can safely be omitted in favour of helping students gain those other skills. (This is something that’s just as important at the level of the senior secondary school curriculum!)

And secondly: giving students early practice at doing & thinking about science may encourage more of them to consider the option of graduate study, maybe going on to become scientists themselves. (In NZ graduate students are funded at a higher rate than undergraduates, and the PBRF system rewards us for graduate completions, so there’s a good incentive for considering change right there!)

I’m sure you can think of others :-)

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