Tagged: IQ

Do we need a new fluoride debate? - Open Parachute

Ken Perrott Oct 12, 2017

I think we do. Something like the good faith scientific exchange I had with Paul Connett four years ago (see Connett & Perrott, 2014 – The Fluoride Debate). After all, there have been a number of important scientific reports since then. They may have been thrashed out (and thrash is sometimes the operative word) in one of the “anti-fluoride” or … Read More

Endemic fluorosis and its health effects - Open Parachute

Ken Perrott Sep 28, 2017

The public debate in New Zealand might convince the casual reader that all the science related to fluoride revolves around tooth decay and IQ. But that is certainly not the case on a world scale. The World Health Organisation gives guidelines for the concentration of fluoride in drinking water recommending it should be in the range 0.5 – 1.5 mg/L. OK, … Read More

Maternal urinary fluoride/IQ study – an update - Open Parachute

Ken Perrott Sep 24, 2017

 The maternal urinary fluoride/IQ study  (Bashash et al., 2017) continues to get attention – but mainly from anti-fluoride organisations. The scientific community will evaluate the published report after giving it due consideration and there have already been criticisms. But anti-fluoride campaigners consider it the best thing since sliced bread. The Fluoride Action Network (FAN) describes it as … Read More

Fluoride, pregnancy and the IQ of offspring - Open Parachute

Ken Perrott Sep 22, 2017

What’s the story about this new IQ-fluoride study? The one that claims fluoride intake by pregnant women could endanger their children’s IQ? Whatever the truth, it has certainly got the anti-fluoride activists going. Mary O’Brien Byrne, leader of the local anti-fluoride group is even suggesting people check if their mothers lived in fluoridated areas. And they are busy promoting the newspaper articles … Read More

Local anti-fluoride activists tell porkies yet again - Open Parachute

Ken Perrott Aug 03, 2017

Well, I suppose that’s not news. A bit surprising, though, because they are claiming the absence of research on fluoridation and IQ – which sort of conflicts with the previous attempts to actually condemn and misrepresent the actual research on fluoridation and IQ. Fluoride Free NZ’s (FFNZ) face book page is claiming: Would you be interested to know that no studies … Read More

Anti-fluoride authors indulge in data manipulation and statistical porkies - Open Parachute

Ken Perrott Mar 12, 2017

Darrell Huff & Irving Geis wrote a classic book – How to Lie With Statistics. They outline various ways data can be presented to give the wrong story. However, there is an even more naive use of statistics to misrepresent data – just declare that a relationship is statistically significant, don’t show any data or statistical analysis. Unfortunately, many … Read More

EPA comprehensively debunks anti-fluoride claims of a fluoride-IQ effect - Unsorted

Ken Perrott Feb 26, 2017

The US environmental Protection Agency (EPA) has denied an anti-fluoride petition to ban community water fluoridation. The document outlining its reasons for declining the petition is valuable because it considers all the arguments and evidence presented in the petition and comprehensively shows them to be misleading or even false. This is a humiliating defeat for the petitioners – the US  Fluoride Action … Read More

Water fluoridation – what to expect in the near future - Open Parachute

Ken Perrott Jan 21, 2017

Community water fluoridation (CWF) will persist in science news for the foreseeable future – not for any valid scientific reason but because of reaction to political pressures against it. This is particularly so in New Zealand where our parliament will be discussing legislative changes to fluoridation decision-making this year. This is not to say that all the relevant news will be … Read More

More nails in the anti-fluoridation myths around IQ and hypothyroidism - Open Parachute

Ken Perrott Jan 16, 2017

A new Canadian study shows no relationship of cognitive deficits or diagnosis of hypothyroidism with fluoride in drinking water. This work is important because it counters the claims made by anti-fluoride campaigners. While the campaigners cite scientific studies to support their claims, those studies are usually very weak, or irrelevant because they involve areas of endemic fluorosis where drinking … Read More

50% of people who lived in 1917 were intellectually disabled - Mere Conjecture

Jack Auty Jan 07, 2017

More than half the world was intellectually disabled prior to 1917CE….. if you extrapolate the Flynn effect. This blog will be an interesting dive into IQ, intellectual disability, crime, time travel and the Flynn effect. Let’s start by saying that you are probably “smarter” (whatever that means) than your parents. That’s right, when you were a pimply, hormone filled, teenager … Read More