Wednesday, 29 September 2010

perspective

Dear Mom,

I plan to beat this average.

Love,
Your Son

(The longest doctoral program in the nation is the music program at Washington University in St. Louis, with a median length of 16.3 years, according to the Chronicle of Higher Education.)

The link is here. Via Marginal Revolution.

fermi paradox

SMBC gets it right again:
:

Tuesday, 28 September 2010

Science journalism how-to

Last month, I wrote about misusing quantum mechanics.

Martin Robbins has taken it to the next level:
This paragraph elaborates on the claim, adding weasel-words like "the scientists say" to shift responsibility for establishing the likely truth or accuracy of the research findings on to absolutely anybody else but me, the journalist.
In this paragraph I will state in which journal the research will be published. I won't provide a link because either a) the concept of adding links to web pages is alien to the editors, b) I can't be bothered, or c) the journal inexplicably set the embargo on the press release to expire before the paper was actually published.
"Basically, this is a brief soundbite," the scientist will say, from a department and university that I will give brief credit to. "The existing science is a bit dodgy, whereas my conclusion seems bang on," she or he will continue.
Hat tip to loyal reader ZM.

Whoa.

via Swansontea:

Monday, 27 September 2010

on invoking the right to remain silent

In the recent case of Berghuis v. Thompkins the U.S. Supreme Court ruled five to four that persons being interviewed by the police are required to articulate their answers to the Miranda warning that they have the right to remain silent. 
This is certainly contrary to my intuition. If someone tells me I have the right to remain silent, I would assume that remaining silent is enough.
Justice Kennedy, writing for the majority, opined that Thompkins' mere silence in the face of questioning was not a clear and unambiguous invocation of his right to remain silent.
From the point of view of the questioning officer, requiring an explicit invocation of a right removes ambiguity. But how should suspects be informed that this is the case?

For the record,
Justice Sotomayer wrote the dissenting opinion, saying (1) that it is counterintuitive for defendants to speak after they are told they have the right to remain silent, (2) that in such cases detectives should presume that the suspects have invoked their rights to silence when they remain silent for almost three hours of questioning [as in this specific case], and (3), citing Miranda: "…the fact that an individual eventually made a statement is consistent with the conclusion that the compelling influence of the interrogation finally forced him to do so. It is inconsistent with any notion of a voluntary relinquishment of the privilege."

Sunday, 26 September 2010

Vaccines don't cause autism

In case anyone needs a reminder: vaccines do not cause autism.
The final two groups that were studied consisted of 256 children with ASD [autism spectrum disorders] and 752 matched controls. One very interesting aspect that looks as though it were almost certainly placed into the experimental design based on concerns of anti-vaccine advocates like Sallie Bernard is a group of children who underwent regression. Basically, the study examined whether there was a correlation between ASD and TCV [thimerosal-containing vaccines, i.e. mercury-containing vaccines] exposure. It also examined two subsets of ASD, autistic disorder (AD) and ASD with regression, looking for any indication whether TCVs were associated with any of them. Regression was defined as: "the subset of case-children with ASD who reported loss of previously acquired language skills after acquisition." 
So what did the investigators find? I think you probably know the answer to that question. They found nothing. Nada. Zip. There wasn't even a hint of a correlation between TCV exposure and either ASD, AD, or ASD with regression: "There were no findings of increased risk for any of the 3 ASD outcomes. The adjusted odds ratios (95% confidence intervals) for ASD associated with a 2-SD increase in ethylmercury exposure were 1.12 (0.83-1.51) for prenatal exposure, 0.88 (0.62-1.26) for exposure from birth to 1 month, 0.60 (0.36-0.99) for exposure from birth to 7 months, and 0.60 (0.32- 0.97) for exposure from birth to 20 months."
(via Kottke)